Dell POWERVAULT MD3600F manual

Dell PowerV ault MD3600f and MD3620f Storage Array s Owner’ s Manual Regulatory Model: E03J Series and E04J Series Regulatory T ype: E03J001 and E04J001 book.book Page 1 Friday, Sept ember 23, 2011 2:4 6 PM[...]

Notes, Cautions, and W arnings NOTE: A NOTE indicates important information that helps you make better use of your computer . CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followe d. WA RN I N G : A W ARNING indicates a potential for property damage, personal injury , or death. ___________ _______[...]

Contents 3 Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . 21 About This Document . . . . . . . . . . . . . . . . . . 21 Inside the Box of the De ll PowerV ault MD3600f Series Storage Array . . . . . . . . . . . . . . . . . . . 22 MD3600f Series Storag e Array . . . . . . . . . . . 22 Dell PowerV ault Modular Disk Storage Mana[...]

4 Contents RAID Controller Module Connectors and Features . . . 34 Host Channel LED Link/Rate Indications . . . . . . . . 36 RAID Controller Modul e— Additional Features . . . . . 36 Battery Backup Unit . . . . . . . . . . . . . . . . 36 Storage Array Thermal Shutdown . . . . . . . . . 37 Sy stem Password Reset . . . . . . . . . . . . . . 37 Cach[...]

Contents 5 V irtual Disk Initiali zation . . . . . . . . . . . . . . 47 Background Initialization . . . . . . . . . . . . . . 48 Foreground Initialization . . . . . . . . . . . . . . 48 Consistency Check . . . . . . . . . . . . . . . . . 48 Media V erification . . . . . . . . . . . . . . . . . 48 Cycle T ime . . . . . . . . . . . . . . . . . . . . [...]

6 Contents Monitoring MD3600f Seri es Sy stem Performance . . . 61 5 Configuration: Overview . . . . . . . . . . . . 65 User Interface . . . . . . . . . . . . . . . . . . . . . . 65 Enterprise Management Window . . . . . . . . . 66 Array Management Window . . . . . . . . . . . . 67 6 Configuration: About Y our Storage Array . . . . . . . . . . . . [...]

Contents 7 Setting the Storage Array RAID Controller Module Clocks . . . . . . . . . . . . . . . . . . . 86 7 Configuration: Event Monitor . . . . . . . . . 87 Enabling or Disabling the Event Monitor . . . . . . . . 88 Windows . . . . . . . . . . . . . . . . . . . . . . 88 Linux . . . . . . . . . . . . . . . . . . . . . . . . 88 8 Configuration: Ab[...]

8 Contents Locating a Disk Group . . . . . . . . . . . . . . 104 Creating V irtual Disks . . . . . . . . . . . . . . . 104 Changing the V irtual Disk Modification Priority . . . . . . . . . . . . . . . . . . . . . . 106 Changing the V irtual Disk Cache Settings . . . . 107 Changing the Segment Size of a V irtual Disk . . . . . . . . . . . . . . . .[...]

Contents 9 Changing the RAID Level of a Disk Group . . . . . 130 Removing a Host-to-V irtual Disk Mapping Using Linux DMMP . . . . . . . . . . . . . . . . . 131 Restricted Mappings . . . . . . . . . . . . . . . . . . . 132 Changing the RAID Controller Module Ownership of a V irtual Disk or a Disk Group . . . . 134 Changing the RAID Level of a Disk [...]

10 Contents Enabling and Disabling Snapshot Schedules . . . . . . . . . . . . . . . . . . . . . 148 Creating a Snapshot V irtual Disk Using the Simple Path . . . . . . . . . . . . . . . . . . . . 148 About the Simple Path . . . . . . . . . . . . . . 149 Preparing Host Servers to Create the Snapshot Using the Simple Path . . . . . . . . . 150 Creati[...]

Contents 11 11 Configuration: Premium Feature—V irtual Disk Copy . . . . . . . . . 169 T ypes of Virtual Disk Copies . . . . . . . . . . . . . . . 170 Offline Copy . . . . . . . . . . . . . . . . . . . . . 170 Online Copy . . . . . . . . . . . . . . . . . . . . . 171 Creating a Virtual Disk Copy for an MSCS Shared Disk . . . . . . . . . . . . . .[...]

12 Contents Re-Copying a V irtual Disk . . . . . . . . . . . . . 181 Removing Copy Pairs . . . . . . . . . . . . . . . . . . 182 12 Configuration: Premium Feature—Upgrading to High– Performance T ier . . . . . . . . . . . . . . . . . 183 13 Configuration: Premium Feature— Remote Replication . . . . . . . . . . . . . . . . 185 Switchable Host [...]

Contents 13 Activating the Remote Replication Premium Feature and Creating Replication V irtual Disks . . . . . . . . . . . . . . . . . . . . . 192 Activating and Creating Re plication Repository Virtual Disks From the Storage Array . . . . . . . . . . . . . . . . . . 192 Activating and Creating Re plication Repository Virtual Disks From an Existin[...]

14 Contents Reversing Roles Between the Primary and Secondary V irtual Disks . . . . . . . . . . . . . 209 Promoting the Secondary V irtual Disk or Demoting the Primary V irtual Disk . . . . . . . . 210 Suspending a Remote Re plication . . . . . . . . 210 Resuming a Remote Replication . . . . . . . . . 211 About Resumed Remote Replications . . . . [...]

Contents 15 15 Management: Firmware Downloads . . . . . . . . . . . . . . . . . . . . . . 229 Downloading RAID Controller and NVSRAM Packages . . . . . . . . . . . . . . . . . . . 229 Downloading Both RAID Controller and NVSRAM Firmware . . . . . . . . . . . . . . . . . 230 Downloading Only NVSRAM Firmware . . . . . . . . . 232 Downloading Phy sica[...]

16 Contents Installing a Hard Drive Into a Hard-Drive Carrier . . . . . . . . . . . . . . . . 249 RAID Controller Module . . . . . . . . . . . . . . . . 249 Removing a RAID Controller Module Blank . . . 249 Installing a RAID Controller Module Blank . . . . 250 Removing a RAID Contro ller Module . . . . . . . 251 Installing a RAID Controller Module [...]

Contents 17 18 Management: Sy stem Interfaces . . . . . 269 Microsoft Services . . . . . . . . . . . . . . . . . . . . 269 V irtual Disk Se rvice . . . . . . . . . . . . . . . . . 269 V olume Shadow-Copy Service . . . . . . . . . . . 269 19 T roubleshooting: Y our Storage Array Software . . . . . . . . . . . . . . . . . . . 271 Start–Up Routine .[...]

18 Contents Capturing the State Information . . . . . . . . . . . . 288 SMrepassist Utility . . . . . . . . . . . . . . . . . . . 289 Unidentified Devices . . . . . . . . . . . . . . . . . . 290 Recovering From an Unidentified Storage Array . . . 290 Starting or Restarting the Host Context Agent Software . . . . . . . . . . . . . . . . . . . . . 29[...]

Contents 19 T roubleshooting RAID Controller Modules . . . . . . . 306 Conditions . . . . . . . . . . . . . . . . . . . . . . 306 21 Getting Help . . . . . . . . . . . . . . . . . . . . . . 309 Contacting Dell . . . . . . . . . . . . . . . . . . . . . 309 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311 book.book Page 19 Friday[...]

20 Contents book.book Page 20 Friday, September 23, 2011 2: 46 PM[...]

Introduction 21 1 Introduction NOTE: Unless specified , MD3600f Series represents Dell PowerV ault MD3600f and Dell PowerV ault MD3620f storage array s. WA RN I N G : See the Safety , Environmental, and Regulatory Information document for important safety information before following any procedures listed in this document. About This Document This [...]

22 Introduction Inside the Box of the Dell PowerV ault MD3600f Series Storage Array Y our M D3600f Series pr oduct package includes: • Dell P owerV ault MD3600f Series storage array • Small form-factor pluggable (SFP) transceiver (2 per controller) • F iber optic cables (optional) • P ower cables (2) • F ront b ezel (optional) • Mountin[...]

Introduction 23 Other Information Y ou May Need WA RN I N G : See the safety and regulatory info rmation that shipped with your sy stem. Warranty information may be in cluded within this document or as a separate document. •T h e Getting Started Guide provides an overview of setting up and cabling your st orage array . •T h e Deployment Guide p[...]

24 Introduction book.book Page 24 Friday, September 23, 2011 2: 46 PM[...]

Planning: About Y our Storage Array 25 2 Planning: About Y our Storage Array Overview The MD3600f Series storage array is designed for high av ailability , offering r edundant access to data storage. It’s fe atures support for bo th single and dual R AID controller configurations. The Dell P owerV ault MD36 00f Series storag e array provides F i [...]

26 Planning: About Y our Storage Array Hardware Features Front-Panel Feature s and Indica tors Figure 2-1. Front-Panel Features and Indicators—Dell PowerV ault MD3600f Figure 2-2. Front-Panel Features and Indicators—Dell PowerV ault MD3620f 1 2 3 5 4 6 1 2 3 4 6 5 book.book Page 26 Friday, September 23, 2011 2: 46 PM[...]

Planning: About Y our Storage Array 27 Figure 2-3. Front-Bezel Features and Indicators Item Indicator , Button, or Connector Icon Descript ion 1 Enclosu re status LED The encl osure stat us LED lights when the enclosur e power is on. Lights blue during normal operation. Blinks blue when a host server is identifying the enclosur e or when the system[...]

28 Planning: About Y our Storage Array 3 Split mode LED This LED must be unlit as the sp lit mode function is not supporte d by the MD3600f Series Storage Arrays. 4 System identi fication button The system identification button on the front control panel can be u sed to locate a particula r enclosur e within a rack. When the button is pushed, the s[...]

Planning: About Y our Storage Array 29 Back Pane l Features and Indic ators Figure 2-4. Back-Panel Features and In di cators—Dell PowerV ault MD3600f Series 1 600 W power supply/cooling fan module 2 RAID Controller Module 0 3 RAID Controller Module 1 4 600 W power supply/cooling fan module 1 2 4 3 book.book Page 29 Friday, September 23, 2011 2: 4[...]

30 Planning: About Y our Storage Array Hard–Drive Indicator Patterns Figure 2-5. Hard Drive Indicators 1 hard-drive activity indicator (green) 2 hard-drive status indicator (green and amber) 1 2 book.book Page 30 Friday, September 23, 2011 2: 46 PM[...]

Planning: About Y our Storage Array 31 Power Supply and Cooling Fan Features The MD3600f Series storage array incl udes two integrat ed, hot-swappable power supply/cooling fan modules. Both modules must be in stalled to ensure proper cooli ng. The syst em requi res a t least one of the cooling f ans to function to avoid overheating. A power supply/[...]

32 Planning: About Y our Storage Array Power Indicator Codes and Features Figure 2-6. Power Indicator Codes and Features Item LED T ype Icon Description 1 DC power The LED lights gr een when the DC output voltage is within the limit. If this LED is off, it indicat es that the DC output voltage ar e not within the limit. 2 P ower supply/cooling fan [...]

Planning: RAID Controller Modules 33 3 Planning: RAID Controller Modules RAID Controller Modules The R AID controller modules provi de high-performance, ad vanced virtual disk c onfigurat ion, an d fault-t olera nt disk subsystem managemen t. Each R AID controller module contains 2 GB of cache that is mirror ed with the other controller's cach[...]

34 Planning: RAID Controller Modules RAID Controller Module Connectors and Features Figure 3-1. MD3600f Series Fibr e Channel RAID Controller Module Item Component Function 1 SAS OUT port P rovides SAS connection for cabling to a downchain expansion enclosur e. 2 FCIN port 0 P rovides host-to-controller FC connection. 3 FCIN port 1 P rovides host-t[...]

Planning: RAID Controller Modules 35 9 Management port Ethernet connector P rovides a 100/1000 Mbps Ethernet connect ion for out-of - band management of the enclosure. 10 Management port speed LED Lights gr een when Ethe rnet connection is operating at 1000 Mbps. Lights amber when Ethernet connection is operating at 100 Mbps. O f f w h e n E t h e [...]

36 Planning: RAID Controller Modules Host Channel LED Link/Rate Indications B e l o w e a c h F C p o r t i s a p a i r o f L E D i n dicators. The status of any FC port can be determined by applying T able 3-1 to the condition of each LED pair . RAID Controller Modu le—Additional Features Battery Backup Unit Each R AID controller contains a two-[...]

Planning: RAID Controller Modules 37 Storage Array Therma l Shutdown The system automatically shuts do wn when system temperature e xceeds the safe threshold. The battery backup unit protects against data loss by providing power to offload cache to no n-volat ile memory in the event of power loss. It is not necessary to shut down any MD1200 Series [...]

38 Planning: RAID Controller Modules Write– Back Cache In write-back cache, write operations r e sult in a completion signal bei ng sent to the host operating system as soon as the cache re ceives the data to be written. The tar get physical disk r eceives the data at a more appropriate ti me in order to increase controller perf ormance. In dual-[...]

Planning: RAID Controller Modules 39 Figure 3-2. Fiber Optic Cable Conn ection The R AID expansion ports support SA S e xpansion connections. F igure 3-3 shows a SAS cable and an SFF-8088 connector . Figure 3-3. SAS Cable 1 SFP transceiver 2 Fiber optic cable 1 SFF-8088 connector 2 S AS cable 1 2 1 2 book.book Page 39 Friday, September 23, 2011 2: [...]

40 Planning: RAID Controller Modules Interoperability of 2 G bps, 4 Gbps, and 8 Gbps Devices The FC standa rd specifies a procedure for speedy auto -detection. If a 4 Gbps port on a switch or device is connected to a 2 Gbps port, it must negotiate down for the link to run at 2 Gbps. If there ar e two 8 Gbps ports on either end of a link, the negoti[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 41 4 Planning: MD3600f Series Storage Array T erms and Concepts This chapter e xplains terms and co ncepts used for configuration and operation of MD3 600f Se ries storage arrays. Phy sical Disks, Virtual Disks, and Disk Groups Physical disks in your storage array provide the physical stor[...]

42 Planning: MD3600f Series St orage Array T erms and Concepts Phy sical Disks Only Dell supported 6.0 Gbps SAS physi cal disks ar e supported in t he storage array . If the storage array detects unsuppo rted physical disks, it marks the disk as unsupported and the physical disk be comes unavailable for all op erations. NOTE: The MD3600f Series sto[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 43 If a disk drive rebuild fails because of a source drive failur e or because the drive is too small, the MDSM r eports a failur e of the physical disk even though the LE D state on the drive indi cates the rebuild was aborted (gr een for 3 seconds, amber for 3 seco nds, then off for 3 se[...]

44 Planning: MD3600f Series St orage Array T erms and Concepts Disk groups are always created in the un configured capacity of a storage array . Unconfigured capacity is the availa ble physical disk space not already assigned in the stor age array . Virtual disks ar e cr eated within the fr ee ca pacity of a disk group. F ree capacity is the space [...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 45 RAID Levels R AID levels determine the way in which data is written to physical disks. Differ ent R AID levels provide different levels of accessibility , redundancy , and capacity . Using multiple physical disks h as the follo wing advant ages over using a s ingle physical disk: • Pl[...]

46 Planning: MD3600f Series St orage Array T erms and Concepts RAID 0 R AID 0 uses disk striping to provide hi gh data throughput, especially for lar g e files in an environment that r equir es no data r edundancy . R AID 0 br eaks the d at a d ow n i n to s e gm e n t s a n d w r it e s ea ch segment to a sepa rate physical disk. I/O performance i[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 47 RAID 10 R AID 10 , a comb ination of R AID 1 and RAID 0, uses disk striping across mirrored disks. It provides high da ta throughp ut and complete data r edundancy . Utilizing an even number of physical disks (four or more) creates a R AID level 10 disk group and/or virtu al disk. Beca [...]

48 Planning: MD3600f Series St orage Array T erms and Concepts Background Initialization The storage array ex ecutes a background in itialization when the virtual disk is created to establish pa rity , while allowing full host server access to the virtual disks. Background initia lization does not run on R AID 0 virtual disks. The background init i[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 49 Cycle T ime The media verification ope ration runs only on selecte d disk groups, independent of other disk groups. Cycle time is the time taken to complete verification of the metadata r egion of the disk group and all virtual disks in the disk group for which media verificati on is co[...]

50 Planning: MD3600f Series St orage Array T erms and Concepts Disk Group Operations RAID Level Migration Y ou can migrate from one R AID level to another depending on your requir ements. F or example, fault-tolera nt characteristics can be added to a stripe set (R AID 0) by converting it to a R AID 5 set. MDSM provides information about R AID attr[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 51 V irtual Disk Capa city Expansion When you configure a virtual disk, you se lect a capacity based on the amount o f d a t a y o u e x p e c t t o s t o re . H o w e v e r , y o u may need to increase the virtual disk capacity for a standar d virtual disk by a dding fr ee capacity to the[...]

52 Planning: MD3600f Series St orage Array T erms and Concepts If a r edundant R AID controller module fails with an existing disk group process, the process on the failed controller is transferr ed to the peer controller . A transferr ed process is placed in a suspende d state if ther e is an active disk group process on the peer controller . The [...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 53 V irtual Disk Migration and Disk Roaming V irtual disk mi gration is moving a virtual dis k or a hot spar e from on e array to another by detaching the physical disks and r e -attaching them to the new array . Disk roaming is moving a phys ical disk from one slot to another on the same [...]

54 Planning: MD3600f Series St orage Array T erms and Concepts Use either of the following methods to move disk groups and virtual disks: • Hot virtual disk migration—Disk migrati on with the destina tion storage array power turned on. • Cold virtual disk migration—Disk migration with the destination storage array power turned off. NOTE: T [...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 55 • Enabling premium features before migration—Befor e migrating disk groups and virtual disks, enable the requir ed premium featur es on the destination storage array . If a disk group is migrated from a MD3600f storage array that has a pr emium feature enabled and the destination ar[...]

56 Planning: MD3600f Series St orage Array T erms and Concepts Y ou can manually configure a host serv er -to-virtual disk mapping. When you configure host server -to-virtual disk mapping, consider these guidelines: • Y ou can define one host server -to-virt ual disk mapping for each virtual disk in the storage array . • Host server -to-virtual[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 57 Snapshot Reposito ry Virtual Disk When you cr eate a snapshot virtual disk , it automatically cr eates a snapshot repository virtual disk. A s napshot reposi tory is a virtual disk cr eated in the storage array as a r esource for a snapsh ot virtual disk. A snapshot r epository virtual [...]

58 Planning: MD3600f Series St orage Array T erms and Concepts Source Virtual Disk When you create a virtual disk copy , a co py pair consisting of a source virtual disk and a tar get virtual disk is cr ea ted on the same storage array . When a virtual disk copy is started, data from the source virtual disk is copied completely to the tar get virtu[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 59 Using Snapshot and Disk Copy T ogether Y ou can use the Snapshot V irtual Disk and Vi r t u a l D i s k C o p y premium featur es together to back up data on th e same storag e array , or to r estor e the data on the snapshot virtual disk to its original source virtual disk. Y ou can co[...]

60 Planning: MD3600f Series St orage Array T erms and Concepts Ownership of a virtual disk is moved from the pr eferred controller to t he secondary controller (also called the al ternate controller) when the pr eferred controller is: • Physically removed • Updati ng firmw ar e • Involved in an event that caused failover to the alte rnate con[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 61 • Round robin with subset—The round robin with subset I/O load balance policy routes I/O requests, in rotation, to each available data path to the R AID controller module that owns the virtual disks. Thi s policy treats all paths to the R AID controller module th at owns the virtual[...]

62 Planning: MD3600f Series St orage Array T erms and Concepts • Using the P erformance Monitor to r etrieve performance data can affect the normal storage array performance depending on the polling interval that you set. • If the storage array you ar e monitoring begins in or transitions to an unresponsive state, an informational dialog is dis[...]

Planning: MD3600f Se ries Storage Array T erms and Concepts 63 9 Select an appropriate directory . 10 T ype a file name in the Fi l e n a m e text box. NOTE: The .perf extension is the default. 11 Select a file type f rom the Fi l e s o f t y p e list. •U s e t h e R eport format (ASCII te xt) file type to save the data to a r eport form for view[...]

64 Planning: MD3600f Series St orage Array T erms and Concepts book.book Page 64 Friday, September 23, 2011 2: 46 PM[...]

Configuration: Overview 65 5 Configuration: Overview Dell P owerV ault Modular Disk Stor age Manager (MDSM) online help contains information on the how to use the MDSM application to perform the configuration and mana gement tasks described in this document. Y ou can access online help by selecting Help located at the top right corner of MDSM inter[...]

66 Configuration: Overview Enterprise M anagement Windo w The EMW provides high-level manage ment of storage arrays. When you start MDSM, the EMW is displayed. The EMW has these tabs: • Devices tab—P rovides information about the storage arrays. • Setup tab—P r esents the initial setup ta sks that guide you through addin g storage arrays an[...]

Configuration: Overview 67 Inheriting the Sy stem Settings Use the Inherit Syst em Settings option to im port the operating system theme settings into the MDSM . Importing system them e settings affects features lik e font type, font size, color , and contrast in the MDSM. 1 Open the Inherit System Settings window in one of these ways: • Select T[...]

68 Configuration: Overview • Physical tab—Y ou can view the organization of the storage array by R AID controller modules, phys ical disks, and other hardwar e components. • Mappings tab—Y ou can define the hosts, hos t groups, and host ports. Y ou can change the mappings to grant virt u al disk access to h ost groups and hosts and create s[...]

Configuration: About Y our Storage Array 69 6 Configuration: About Y our Storage Array Y ou can manage a storage array in two ways: • Out-of -band management • In-band management Out-of-Band Management Using the out-of -band management meth od, data is separated from c ommands and events. Data tra vels through the host-to-co ntroller interface,[...]

70 Configuration: About Y our Storage Array When you add storage arrays by using this management me thod, you need to specify only the host name or IP address of the host. After you add the specific host name or IP addr ess, the host -agent softwar e automatically detects any storage arrays that are connected to that host. CAUTION: Some operating s[...]

Configuration: About Y our Storage Array 71 Automatic Discovery of Storage Array s The A uto matic Discovery process sends out a broa dcast message across the local subnetwork (subnet) an d adds any storage array that responds to the message. The Automatic Discovery process finds both in-band and out-of - band storage arrays. NOTE: The Automatic Di[...]

72 Configuration: About Y our Storage Array • In the EMW , select the Setup tab, and select Name/Rename Storage Arrays . • In the AMW , select the Setup tab, and select Ren a m e S t o ra g e A rr a y . • In the EMW , right-click the icon corresponding to the array and select Re n a m e . Setting Up Y our Storage Array A list of initial setup[...]

Configuration: About Y our Storage Array 73 • Manually de fine hosts—Define the hosts and the host p ort identifiers that are connected to the storage array . Use this option only if th e host is not automatically recognized and shown in the Mappings tab. • Configure ethernet management ports—Configur e the network parameters for the Ethe r[...]

74 Configuration: About Y our Storage Array T o rename a selected storage array: 1 P erform one of these actions: • In the AMW Setup tab, select Ren a m e S t o ra g e A r ra y . •I n t h e E M W Devices tab T r ee view , select Edit  Ren a m e. •I n t h e E M W Devices tab T able view , select Edit  Re n a m e . •I n t h e E M [...]

Configuration: About Y our Storage Array 75 Setting a Password Y ou can configure each storage array with a passwor d to protect it from unauthorized access. MDSM prompts for the passwor d when an attempt is made to change the storage array configur ation, such as, when a virtual disk i s cr eated or deleted. View operations do not change the stora[...]

76 Configuration: About Y our Storage Array Password Guidelines F ollow these guidelines when you cr eate a password: • Use secure passwor ds for your storage array . A password must be easy for you to remember but difficult for ot hers to determine. Consider using numbers or special characters in the place of letters, such as a 1 in the place of[...]

Configuration: About Y our Storage Array 77 Adding/Editi ng a Comment to an E xisting Storage Array A descriptive comment, with an applic a ble storage array name, is a he lpful identification tool. Y o u can add or edit a comment for a storage array in the EMW only . T o add or edit a comment: 1 In the EMW , select the Devices tab and select the r[...]

78 Configuration: About Y our Storage Array Enabling Premium Features Y ou can enable pr emium features on the storage array . T o enable the premium features, you must obtain a feature k ey file specific to the pr emium feature that you want to enable from your storage supplier . T o enable premium features: 1 F rom the toolbar in AMW , select Sto[...]

Configuration: About Y our Storage Array 79 Changing the Cache Settings on the Storage Array 1 In the AMW , select Storage Array  Change  Cache Settings . The Change Cache Settings window is dis played. 2 Select or enter the percentage of unwr itten data in the cache to trigger a cache fl ush in Start flushing . 3 Select or enter the pe[...]

80 Configuration: About Y our Storage Array Changing the Enclo sure Order in the Phy sical Pane Y ou can change the order of the R AID con troller mo dules and the expansion enclosur es in the Physical pane to match the har dwa re configuration in your storage array . The Physical pane that i nitially is d isplayed is a de fault view that may not m[...]

Configuration: About Y our Storage Array 81 T o confi gure alert noti ficati ons for a sing le storag e array: 1 In the EMW , select the Devices tab. 2 Select the relevant storage array , then select Edit  Configure  Alerts . The Configure Alerts dialog is disp layed. T o conf igure e-mail alerts, see "Configuring E–mail A lerts&[...]

82 Configuration: About Y our Storage Array The SMTP mail server i s the name of the mail server that forwards the alert e-mails to the configured e-mail addresses. 5 In E-mail sender address , type the vali d sender e-mail address. The e-mail address of the sender (the network administrator) is displayed on each e-mail alert sent to the de stinati[...]

Configuration: About Y our Storage Array 83 9 F o r the selected e-mail address, in Fr e q u e n c y , select: • Every event —Sends an alert e-mail whenev er an event occurs. This is the default option. • Every x hours —Sends an alert e-mail after the specified time interval if an event occurr ed duri ng that time interval. Y ou can select [...]

84 Configuration: About Y our Storage Array These results occur , depending on your selection: • If you select all s torage arrays, the Configure Alerts dialog is displayed. • If you select an individual storage array , the Select Storage Ar ray dialog is dis played. Select the st orage array for which you want to receive alert notifications an[...]

Configuration: About Y our Storage Array 85 F o llow these guideli ne for SNMP alerts: • Any SNMP addresses that you had previously configured are displayed in the Configured SNMP addr esses area. • The SNMP Community Name is determined by the system administrator and configured within the a ma nagement application, s uch as the Dell Management[...]

86 Configuration: About Y our Storage Array T o change the battery settings perform these steps: 1 In the AMW , select Storage Array  Change  Battery Settings . The Battery Settings dialog is disp layed. 2 In Battery location , select a battery . 3 Check these details about the battery : • Battery status • Battery age • Days until[...]

Configuration: Event Monitor 87 7 Configuration: Event Monitor An event monitor is provided with De ll P owerV ault Modular Disk Stor age Manager (MDSM). The event monitor runs continuous ly in the background and monitors activity on the managed storage arrays. If the event monitor detects any critical problems, it can notify a host or r emote syst[...]

88 Configuration: Event Monitor Enabling or Disabli ng the Event Monitor Y ou can enable or disable the event monitor at any time. Disable the event monitor if you do not want the system to send alert notifications. If you ar e running the event monitor on multiple systems, disabling the event monitor on all but one system pr events t he sending of[...]

Configuration: About Y our Host 89 8 Configuration: About Y our Host Configuring Host Access Dell P owerV ault Modular Disk Stor age Manage r (MDSM) software is comprised of multiple modules. One of these modules is the Host Cont ext Agent. The host conte xt agent is instal led as part of the MDSM installation and runs continuously in the backgroun[...]

90 Configuration: About Y our Host The host topology is re configurable. Y ou can perf orm the following tasks: • Create a host and assign an alias or user label. • Add or associate a new host p ort identifier to a particul ar host. • Change the h ost port identifier alias or use r label. • Move or associate a host port identifier to a diff[...]

Configuration: About Y our Host 91 T o define a host: 1 In the AMW , select the Mappings tab and select the appropriate storage arra y . 2 P erform one of the actions: • Select Mappings  Define  Host . • Select the Setup tab, and click Manually Define Hosts . • Select the Mappings tab. Right-click the root node (storage array name[...]

92 Configuration: About Y our Host • No —this host does NOT share access to the same virtual disks with other hosts. 9 Click Next . If you s elect Ye s , the Specify Host Group window is dis played. If you select No , see step 11 10 Enter the name of the host group or se lect an existing host group and click Next . The Pr e v i e w window is di[...]

Configuration: About Y our Host 93 Creating a Host Group 1 In the AMW , select the Mappings tab. 2 In the To p o l o g y pane, select the storage array or the Default Group . 3 P erform one of the following actions: • Select Mappings  Define  Host Group • Right-click the storage array or the Default Group, and sele ct Define  [...]

94 Configuration: About Y our Host Moving a Host to a Different Host Group 1 In the AMW , select the Mappings tab, select the host node in the To p o l o g y pane. 2 P erform one of these actions: • Select Mappings  Move . • Right-click the host node, and s elect Move from the pop-up menu . The Move Host dialog is dis played. 3 In the Sel[...]

Configuration: About Y our Host 95 Host T o pology Host topology is the o r gani zation o f hosts, host gr oups, and host interfaces configured for a storage array . Y ou can view the host topology in the Mappings tab of the AMW . F or more info rmation, see "Using the Mappings T ab" on page 90. The following tasks change the host topolog[...]

96 Configuration: About Y our Host Windows T o start or stop the host context agent: 1 Click Start  Settings  Contro l P anel  Administrative T ools  Services . or Click Start  Administrative T ools  Ser vices . 2 F rom the list of services, select Modular Disk Storage Manager A gent . 3 If the host context agent is[...]

Configuration: About Y our Host 97 F or more information on Linux DM please see "Confi guration: Device Mapper Multipath for Linux" on page 21 9. F or mor e information on MPIO please see microsoft.com . NOTE: Y ou must have the multi-path driver in stalled on the hosts at all times, even in a configuration where there is only one path to[...]

98 Configuration: About Y our Host T o manage a host port identifier: 1 P erform one of these actions: • Right-click the host in the To p o l o g y pane, and se lect Manage Host P ort Identifiers in the pop-up menu. • F rom the menu bar , select Mappings  Manage Host P ort Identifiers . The Manage Host P ort Identifiers dialog is disp layed.[...]

Configuration: About Y our Host 99 8 Select the host port iden tifier that you would l ike to manage from the list of host port identifiers in the Host port identifier information area. 9 P erform one of these actions for the selected host port identifier : • T o edit the host port identifier—Select the appropriate host port identifier and clic[...]

100 Configuration: About Y our Host book.book Page 100 Friday, Sep tember 23, 2011 2:46 PM[...]

Configuration: Disk Groups and Virtua l Disks 101 9 Configuration: Disk Groups and V irtual Disks Creating Disk Groups and V irtual Disks Disk groups ar e created in the unconfi g ured capacity of a storage array , and virtual disks ar e created in the fr ee capacity of a disk group. The maximum number of physical disks supported in a disk group is[...]

102 Configuration: Disk Groups and V irtual Disks A disk group must be organized accor ding to its related tasks and subtasks. F or example, if you cr eate a disk gr oup for the Accounting Department, you can cr eate virtual disks that mat c h the different types of accounting transactions performed in the depa rtment: Accounts Receivable (AR), Acc[...]

Configuration: Disk Gr oups and V irtual Disks 103 3 T ype the name of the disk group (up to 30 characters) in Disk group name . 4 Select the appropriate Physical Disk selection choices , you can select: • A utomatic , see step 6 • Manual , see step 9 5 Click Next . 6 F or Automatic configuration, The RA I D L e v e l a n d C a p a c i t y wind[...]

104 Configuration: Disk Groups and V irtual Disks Locating a Disk Group Y ou can physically locate and identify al l of the physical disks that comprise a selected disk group. An LED blinks on each physical disk in the disk gro up. T o locate a disk group: 1 In the AMW , select the Lo gi c al tab. 2 Select the appropriate disk grou p and from the t[...]

Configuration: Disk Gr oups and V irtual Disks 105 NOTE: Ensure that you create disk gr oups before creating virtual disks. T o cr eate virtual disks: 1 Choose one of these methods to start the Create V irtual Disk Wizard : • T o cr eate a virtual disk from unconfigured capacity in the storage array—On the Lo gi c a l tab, select an Unconfigure[...]

106 Configuration: Disk Groups and V irtual Disks 5 In Advanced virtual disk parameters , you can select: • Use recommended settings . • Customize settings . 6 Click Next . 7 In the Customize Advanced V irtual Disk P arameters window , sel ect the approp riate V irtual Disk I/O characteristics type. Y ou can select: • F ile system (typical) ?[...]

Configuration: Disk Gr oups and V irtual Disks 107 T o change the virtual disk modification priority : 1 In the AMW , select the Log ic al tab. 2 Select a virtual disk. 3 In the toolbar , sele ct Vi r t u a l D i s k  Change  Modification P riority . The Change Modi fication P riority window is displayed. 4 Select one or more virtual di[...]

108 Configuration: Disk Groups and V irtual Disks To c h a n g e t h e v i r t u a l disk cache settings: 1 In the AMW , select the Lo gi c al tab and select a virtual disk 2 In the toolbar , select Vi r t u a l D i s k  Change  Cache Settings . The Change Cache Settings window is displayed. 3 Select one or more virtual disks. T o selec[...]

Configuration: Disk Gr oups and V irtual Disks 109 5 Click OK . A message prompts you to confirm the change in the virtual disk modification priority . 6 Click Ye s . 7 Click OK . Changing the Segment Size of a Virtual Disk Y ou can change the segmen t size on a selected virtual disk. During this operation, I/O performance is affect ed, but you r d[...]

110 Configuration: Disk Groups and V irtual Disks T o change the segment size of a virtual disk: 1 In the AMW , select the Lo gi c al tab and select a virtual disk. 2 Select Vi r t u a l D i s k  Change  Segment Size . 3 Select the requir ed segment size. A message prompts you to confirm the selected se gment size. 4 Click Ye s . The se[...]

Configuration: Disk Gr oups and V irtual Disks 111 T o change the I/O type: 1 Select from these virtual disk I/O ch aracteristic types, based on your application needs: • F ile system (typical) • Database •M u l t i m e d i a •C u s t o m The corr esponding dynamic cache read pr efetch se tting and segment siz e values that are typically we[...]

112 Configuration: Disk Groups and V irtual Disks Phy sical Disk Security With Self Encrypting Disk Self encrypting disk (SED ) technology pr events unauthorized access to the data on a physical disk that is physica ll y removed from the storage array . The storage array has a security k ey . Self en crypting disks prov ide access to da ta only thr[...]

Configuration: Disk Gr oups and V irtual Disks 113 T able 9-1 shows how to interpret the security status of a disk group. The Physical Disk Security menu is displayed in the Storage Array menu. The P hysical Disk Security menu has these options: • Create Security K ey • Change Security K ey •S a v e S e c u r i t y K e y F i l e • V alidate[...]

114 Configuration: Disk Groups and V irtual Disks The Secure Physical Disks option is inactive with a check mark on the left if the disk group i s already security enabled. The Create a secure disk group option is displa yed in the Create Disk Group Wizard - Disk Group Name and Physical Disk Selection dialog. The Create a secure disk group option i[...]

Configuration: Disk Gr oups and V irtual Disks 115 T o cr eate a security k ey : 1 In the AMW toolbar , select Storage Array  Physical D isk Securi ty  Create Security K ey . The Create Security K ey window is displayed. 2 In Security key identifier , enter a string that becomes part of the secur e k ey identifier . Y ou can enter up to[...]

116 Configuration: Disk Groups and V irtual Disks After you have cr eated a security k ey , yo u can create secur e disk groups from security capable physical disks. Cr ea ting a secure disk group mak es the physical disks in the disk group secu rity-enabled. Security-enabled physical disks enter Security L ocked status whenever power is re-applied[...]

Configuration: Disk Gr oups and V irtual Disks 117 3 In Secure key identifier , enter a string that becomes part o f the secure k ey identifier . Y ou may leave the text box blank, or enter up to 189 alpha numeric characters without white space, punc tuation, or symbols. Additional characters ar e generated automatically . 4 Edit the default path b[...]

118 Configuration: Disk Groups and V irtual Disks T o save the security k ey for the storage array : 1 In the AMW toolbar , select Storage Array  Physical Disk S ecurity  Save Security K ey Fi l e . The Save Security K ey F ile - Enter P ass Phrase window is displayed. 2 Edit the defaul t path by adding a file name to the end of the pat[...]

Configuration: Disk Gr oups and V irtual Disks 119 the appropriate security key must also be imported to the new storage array . Otherwise, the data on the security enab led physical disks that were moved is inaccessible. F or more information on validating the security k ey , see the Po w e r V a u l t Modular Disk S torage Manage r online help to[...]

120 Configuration: Disk Groups and V irtual Disks Configuring Hot Spare Phy sical Disks Guidelines to configure host spar e physical disks: • Y ou can use only unas signed physical dis ks with Optimal status as hot spare physical disks. • Y ou can unassign only hot spar e physical disk s with Optimal, or Standby status. Y ou cannot unass ign a [...]

Configuration: Disk Gr oups and V irtual Disks 121 • Right-click the physic al disk and select Hot Spare Coverage from the pop-up menu. The Hot Spare Physical Disk Options window is dis played. 4 Select the appropriate opti on, you ca n select: • V iew/ change current hot sp are coverag e —to r eview hot spar e coverage and to assign or unass[...]

122 Configuration: Disk Groups and V irtual Disks Hot Spares and Rebuild A valuable strategy to protect data is to assign available physical disks in the storage arra y as hot spar es. A hot spar e a dds another level of fault tolerance to the storage array . A hot spar e is an idle, powered-on, stand-by physical disk r eady for immediate use in ca[...]

Configuration: Disk Gr oups and V irtual Disks 123 Hot Spare Drive Protection Y ou can use a hot spar e physical disk fo r additional data protection from physical disk failures that occur in a R AID level 1, or R AID level 5 di sk group. If the hot s par e physical dis k is availa ble when a physical disk fails, the R AID controller module uses re[...]

124 Configuration: Disk Groups and V irtual Disks CAUTION: Enclosure loss protection is not guaranteed if a phy sical disk has already failed in the disk group. In th is situation, losing access to an expansion enclosure and consequently another phy sical disk in the disk group causes a double phy sical disk failure and loss of data. Enclosure loss[...]

Configuration: Disk Gr oups and V irtual Disks 125 Host-to-V irtual Disk Mapping After you creat e virtual di sks, you must map them to the host(s) connected to the array . Guidelines to configure ho st-to-virtual disk mapping: • Each virtual disk in the storage array can be mapped to only one host or host group. • Host-to-virtual disk mappings[...]

126 Configuration: Disk Groups and V irtual Disks • Not every operating system has the same number of L UNs available. • Y ou can define the mappings on the Mappings tab in the AMW . See "Using the Map pings T ab" on page 90. Creating Host-t o-Virtua l Disk Mappings Guidelines to define the mappings: • An access virtual disk mapping[...]

Configuration: Disk Gr oups and V irtual Disks 127 5 In Lo gi c a l u n it n um be r , select a L UN. The supported L UNs ar e 0 through 255. 6 Select the virtual disk to be mapped in the Vi r t u a l D i s k area. The Vi r t u a l D i s k area lists the names and capacity of the virtual disks that are available for mapping based on the sele cted h[...]

128 Configuration: Disk Groups and V irtual Disks 4 In Lo gi ca l u nit nu m be r , select the appropriate L UN. The drop down list shows only the currently available L UNs that are associated with the selected virtual disk. 5 Click OK . Stop any host applications associated with this virtual disk, and unmount the virtual disk , if applicable, from[...]

Configuration: Disk Gr oups and V irtual Disks 129 ownership of the tar get virtu al d i s k i s re s t o r e d t o i t s p re f e r re d RA I D c o n t r o l l e r module. If ownership of th e source virtual disk is changed during the virtual disk c opy , ownership o f the tar get virtual disk is al so c hanged. Under certain operating system envi[...]

130 Configuration: Disk Groups and V irtual Disks ownership of the targ et virt ual disk is restor ed to its preferr ed RAID controller module. If ownership of th e source virtual disk is changed during the virtual disk copy , ownership of the target virtua l disk is also chan ged. Under certain operating system en vironments, it may be neces sary [...]

Configuration: Disk Gr oups and V irtual Disks 131 1 In the AMW , select the Log ic al tab and select a disk group. 2 Select Disk Group  Change  RA I D L e v e l . 3 Select the appropriate RAID level and click Ye s to confirm the selection. The R AID level operati on begins. Removing a Ho st-to-Vi rtual Disk Mapping Using Linux DMMP T o[...]

132 Configuration: Disk Groups and V irtual Disks # echo 1 > /sys/block/sd_x/device/delete wher e sd_x is the SD node (di sk device ) returned by the multipath command. Repeat th is command for a ll paths related to this device. Fo r e x a m p l e : #echo 1 > /sys/block/sdf/device/delete #echo 1 > /sys/block/sde/device/delete 5 Remove mapp[...]

Configuration: Disk Gr oups and V irtual Disks 133 • Y ou cannot change a host adapter port to a restricted host type if th er e are alr eady mappings in the storag e partition that would ex ceed the limit imposed by the restricted host type. • Consider the case of the Default Group that has access to L UNs up to 256 (0 t o 2 5 5 ) a n d a re s[...]

134 Configuration: Disk Groups and V irtual Disks Changing the RAI D Controller Modul e Ownership of a Virtual Disk or a Disk Group Y ou can change the R AID controller modu le ownership of a virtual disk or a disk g roup. Y ou can change the R AID controller modu le ownership of a standar d virtual disk or a snapshot repository virtual disk. Y ou [...]

Configuration: Disk Gr oups and V irtual Disks 135 CAUTION: Possible loss of data access—If y ou do not use a multi-path driver , shut down any host applicati ons that are currently us ing the virtual disk. This action prevents application e rrors when the I/O path changes. e Click Ye s . The ownership of the virtual disk is ch anged. I/O to the [...]

136 Configuration: Disk Groups and V irtual Disks Changing the RAID Level of a Disk Group Use the Change  RA I D L e v e l option to change the R AID level o n a selected disk group. Using this option changes the R AID levels of every virtual disk that comprises the disk group. P erforma nce may be slightly affected during the operation. K ee[...]

Configuration: Disk Gr oups and V irtual Disks 137 Storage Partitioning A storage partition is a logi cal entit y consisting of one or mor e virtual disks that can be accessed by a single host or shar ed among ho sts that are part of a host group. The first time you map a virtu al disk to a specific host or host group, a storage pa rtition is creat[...]

138 Configuration: Disk Groups and V irtual Disks Storage partitioning is unavailable when: • No valid host groups or hosts e xist in the To p o l o g y pane on the Mappings tab. • No host ports ar e defin ed for the host be ing included in the storage partition. • All mappings are defined. NOTE: Y ou can include a secondary virtual disk in a[...]

Configuration: Disk Gr oups and V irtual Disks 139 NOTE: If the RAID level of the disk group is RAID level 5, or RAID level 6, and the expansion enclosure has enclosure loss protection, Display only phy sical disks that ensures enclosure loss protection is displayed and is selected by default. 4 in the A vailable physical disks area, select physica[...]

140 Configuration: Disk Groups and V irtual Disks Using Unconfigured Capacity Y ou can increase the capacity of a standar d virtual disk or a snapshot repository virtual disk usin g the unconfigured capacity when no free capacity exists on a disk group. An increase is achieved by adding unconfigured capacity , in the form of unassigned phys ical di[...]

Configuration: Disk Gr oups and V irtual Disks 141 Exporting a Disk Grou p On the source storage array: 1 Save the storage array configuration. 2 Stop all I/O and u nmount or disconnect the fi le systems on the virtu al disks in the disk group. 3 Back up the data on the virtual disks in the disk group. 4 Locate the disk group and label th e physica[...]

142 Configuration: Disk Groups and V irtual Disks Importing a Disk Group NOTE: Y ou must insert all of the phy sical disk s that are part of the disk group into the enclosure before the disk group can be imported. On the tar get storage array : 1 Insert the ex ported physical disks in to the available physical disk slots. 2 Review the Import Report[...]

Configuration: Disk Gr oups and V irtual Disks 143 Storage Array Media Scan The media scan is a backgrou nd operation that e xamines virtual disks to verify that data is accessible. The pr ocess finds media errors before normal r ead and write activity is disrupted and reports errors to the event log . NOTE: Y ou cannot enable background media scan[...]

144 Configuration: Disk Groups and V irtual Disks The media scan duration specifies the number of days for which the media scan runs on the selected virtual disks. 5 T o disable media scans on an individu al virtual disk, s elect the virtual disk in the Select virtual disks to scan area, and deselect Scan selected virtual disks . 6 T o enable media[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 145 10 Configuration: Premium Feature— Snapshot V irtual Disks NOTE: If you order ed this feature, you recei ved a Premium Feature Activation card shipped in the same box as your Dell PowerV ault MD storage array . Follow the directions on the card to obtain a key file and to enable the fe[...]

146 Configuration: Premium F eature—Snapshot V irtual Disks repository uses less disk space than a full physical copy , because the only data blocks that ar e stor ed in the snapshot r epository vi rtual disk are those th at have changed sinc e the time of the snapshot. When you create a snapshot virtual disk, specify its location, capacity , sch[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 147 F riday , at a time between the end of th e work day and 11PM. Do not select an end date. Apply the same sc hedule to the second vi rtual disk, then map the two snapshot virtua l disks to your backup host server and perform your r egular backup procedures. Remember to unmap the two re su[...]

148 Configuration: Premium F eature—Snapshot V irtual Disks Enabling and D isabling Snapshot Sche dules A scheduled snapshot operation can be temporarily suspended by disabling the schedule. When a schedule is disa bled, the schedule time r continue s to run but any scheduled snapshot operation do not occur . Scheduled Snapshot Icons Scheduled sn[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 149 About the Simple Path Using the sim ple path, you can specify : • Snapshot Virtual Disk Name—A user -specified name that hel ps you associate the snapshot virtual d isk to its corr esponding snap shot re pository virtual disk and source virtual disk. • Snapshot Repository Virtual D[...]

150 Configuration: Premium F eature—Snapshot V irtual Disks Preparing Host Servers to Create the Snapshot Using the Simple Path NOTE: Before using the Snapshot Vi rtual Disks Premium Feature in a Microsoft Windows clustered configuration, you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk. This ensu[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 151 NOTE: Removing the drive letter of the as sociated virtual di sk(s) in Windows or unmounting the virtual drive in Linux helps to guarantee a stable copy of the drive for the Snapshot. Befor e creating a snapshot virtual disk, th e host server has to be in the proper state. T o ensure tha[...]

152 Configuration: Premium F eature—Snapshot V irtual Disks After creating one or mor e snapshot virtual disks, mount the source virtual disk, and restart the host application using th at source virtual di sk. 11 In the AMW , select the Mappings tab, assign mappings between the snapshot virtual disk and the host that accesses the snapsh ot virtua[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 153 • Capacity Allocation—This parameter allows you to choose wher e to cr eate the snapshot r epository virtual disk. Y o u can alloca te capacity by us ing one of the following methods: – Use fr ee capacity on the same disk group wher e the source virtual disk resides. – Use fr ee [...]

154 Configuration: Premium F eature—Snapshot V irtual Disks Preparing Host Servers to Create the Snap shot Using the Advanced Path NOTE: Before using the Snapshot Vi rtual Disks Premium Feature in a Microsoft Windows clustered configuration, you must first map the snapshot virtual disk to the cluster node that owns the source virtual disk. This e[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 155 • Y ou must satisfy the requir e ments of your host operating system for creating snapshot virtual disks. F ailure to meet the r equir ements of your host operating system results in an inaccurate snapshot of the source virtual disk or the target virtual disk in a virtual disk copy . N[...]

156 Configuration: Premium F eature—Snapshot V irtual Disks If you want to use a snapshot regu larly , such as for backups, use the Disa ble Snaps hot and Re -c r e at e S n a ps h o t options to r euse the snapshot. Disabli ng a nd re - c rea t i ng s n a ps h o t s p re s er v e s t he existing virtual di sk-to-host mappin gs to the snapshot vi[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 157 The Specify V irtual Disk P arameters window is d isplayed. 9 In the Snapshot virtual disk parameters area, select the relevant mapping option, you can select: • A utomatic • Map later 10 In the Snapshot repository virtual disk p arameters ar ea, en ter the sy stem behavior wh en: ?[...]

158 Configuration: Premium F eature—Snapshot V irtual Disks where seque nce-number is the chronological number of the snapshot rel ative to the source virtual disk. The default name for the associated snap shot r epository virtual disk that is shown in the Snapshot reposito ry virtual disk field is: <source-virtual disk-name>—R<sequenc[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 159 Snapshot Repository Capacity If you r eceive a warning that the ca paci ty for the snapshot r epository virtual disk is approaching its threshold, you ca n increase the capacity of a snapshot r epo sitory virt ual di sk by using one of the follo wing methods: • Use the free capacity av[...]

160 Configuration: Premium F eature—Snapshot V irtual Disks free capacity is available, the maximum free space is displayed in the Increase capacity by field. If free capacity does not e xist on th e disk group, the fr ee space that is displayed in the Incr ease capacity by spinner box is 0. Y ou must add physical disks to cr eate free capacity o[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 161 NOTE: The phy sical disks that is displaye d has a capacity that is either the same size or larger than the capacity of the phy sical disks already being used by the disk group. 9 Select either a single physical disk to add or two physical disks to add. 10 Click Add . The Add Physical Di[...]

162 Configuration: Premium F eature—Snapshot V irtual Disks Disabling a Snapshot V irtual Disk Disable a snapshot virtual disk if: • Y ou do not need the snapshot now . • Y ou intend to r e-create the snapshot at a later time and want to retain the associated snapshot repositor y virtual disk so th at you do not need to create it again. • Y[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 163 Preparing Ho st Servers to Re-create a S napshot V irtual Disk NOTE: Before you create a new snapshot of a source virtual disk, stop any data access (I/O) activity or suspend data transfer to the source virtua l disk and snapshot virtual disk to ensure that y ou capture an acc urate snap[...]

164 Configuration: Premium F eature—Snapshot V irtual Disks Re-creating Snapshot V irtual Disks Y ou can re-cr eate a snapsho t virtual disk that you have previously disabled. CAUTION: Possible loss of data redundancy – If the snapshot virtual disk is in Optimal status, it is first disabl ed prior to being re-created. This action invalidates th[...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 165 The associated snap shot reposi tory virtual disk must have suff icient capacity to proces s the rollba ck operati on and th e write operations from the host. At most, the snapshot repository virtual disk may need twice the size of the base disk, plus additional m etadata space equaling [...]

166 Configuration: Premium F eature—Snapshot V irtual Disks If an error occurs during the roll back , the operation is paused and the base virtual disk and snapshot virtual disk displays Needs Attention icons. The R AID controller module al so logs the event to the Major Event Log (MEL). F ollow the Recovery Guru procedur e to correc t the error [...]

Configuration: Premium Featur e—Sna pshot Virtual Disks 167 2 Choose one: • Select the snapshot virtual disk, and select Vi r t u a l D i s k  Snapshot  R ollback . • Right-click the snapshot virtual disk and select Rol l b ac k . The Confirm R ollback Snapshot V irtual Disk dialog is displa yed. 3 In the Select rol lback priority ar[...]

168 Configuration: Premium F eature—Snapshot V irtual Disks Canceling a Snapsh ot Rollback WA RN I N G : Risk of data loss: If you cancel a snapshot rollback in progress, the base virtual disk may remain in an unusabl e state and the snapshot virtual disk is displayed as failed in the MD stor age management software. Therefore, do not cancel a sn[...]

Configuration: Premium Feature—V irtual Disk Copy 169 11 Configuration: Premium Feature— V irtual Disk Copy NOTE: A virtual disk cop y overwrit es data on the target virtual disk. Before starting a virtual disk copy , ensure that you no longer need the data or back up the data on the target virtual disk. NOTE: If you order ed this feature, you [...]

170 Configuration: Premium F eature—V irtual Disk Copy Reasons to use virtual disk copy include: • Copying data for improved access—As your storage requir ements for a virtual disk change, you can use a virtual disk copy to copy data to a virtual disk in a d isk group tha t uses drives with larger capacity within the same storage array . Copy[...]

Configuration: Premium Feature—V irtual Disk Copy 171 formatted with a journaling file system, any attempt to issue a read r e quest to the source virtual disk may be rejected by the storage array R A ID controller modules and result in an erro r message. M ake sur e tha t the Read-Only attribute for the target virtual disk is di sabled after the[...]

172 Configuration: Premium F eature—V irtual Disk Copy Creating a V irtual Disk Copy for an MSCS Shared Disk T o cr eate a virtual disk copy for a Mi cros oft Cluster Server (MSCS) shar ed disk, create a snapshot of the virtual disk, and then use the snapshot virtual disk as the source for the virtual disk copy . NOTE: An attempt to directly crea[...]

Configuration: Premium Feature—V irtual Disk Copy 173 • T o enable Read-Only pe rmission, select Change  T arget V irtual Disk Pe r m i s s i o n s  Enable R ead-Only . NOTE: Write requests to the target virt ual disk are rejected when the Read- Only permission is enabled on the target virtual disk. • T o disable Read-Onl y permis[...]

174 Configuration: Premium F eature—V irtual Disk Copy NOTE: The following host preparation sectio ns also apply when using the virtual disk copy feature through the CLI interface. Creating a V irtual Disk Copy Source virtual disks that ar e participatin g in a virtual disk copy are available for r ead I/O activity only while a virtual di sk copy[...]

Configuration: Premium Feature—V irtual Disk Copy 175 If 16 virtual disk copies with the status of In P rogress e xist, any subsequent virtual disk copy has the status Pe n d i n g , which stays until one of the 16 virtual disk copies complete. V irtual Disk Co py and Modificati on Operations If a modifi cation operation is running on a source vi[...]

176 Configuration: Premium F eature—V irtual Disk Copy When the virtual disk copy fai ls, a crit ical ev ent is logged in the Event Log , and a Needs Attention icon is di splayed in the A M W . While a virtual disk copy has this status, the host has r ead-only access to the source virtual disk. Read requests from and write requests to the target [...]

Configuration: Premium Feature—V irtual Disk Copy 177 Copying the V irtual Disk Y ou can cr eate a virtual disk copy by using the Create Copy Wizard . CAUTION: Possible loss of data access – A vi rtual disk copy overwrites data on the target virtual disk. A virtual di sk copy autom atically makes the target virtual disk read-only t o hosts. Y o[...]

178 Configuration: Premium F eature—V irtual Disk Copy 8 In the Select copy priority ar ea , select the relevant copy priority and cli ck Next . The Confirmation window displays the summary of your selections. 9 Ty p e yes and clic k Fi n i s h . NOTE: The Operation in Pr ogress icon is displayed on the source virtual disk and the target virtual [...]

Configuration: Premium Feature—V irtual Disk Copy 179 The Copy Manager window is displayed. 2 In the table, select one or more copy pairs. 3 Select Change  Copy P riority . The Change C opy P riority window is dis played. 4 In the Copy priority area, select the appropriate copy priority , depending on your system performance needs. NOTE: Th[...]

180 Configuration: Premium F eature—V irtual Disk Copy The Re co p y option overwrites e xisting data on the tar get virtual disk and make s the target virtual disk r ead-only to hosts. This option fails all snapsho t virtual disks associated with the target virtual disk, if any e xist. Preparing Host Servers to Recopy a V irtual Disk NOTE: Befor[...]

Configuration: Premium Feature—V irtual Disk Copy 181 Re-Copying a V irtual Disk Y ou can use the Copy Ma nager to create a new virtual disk copy for a selected source virtual disk and a tar get virtual disk. Use th is option when you have stopped a virtual disk copy and want to start it again or when a virtual disk copy has failed or completed. [...]

182 Configuration: Premium F eature—V irtual Disk Copy Removing Copy Pairs Y ou ca n r emove one or more virtual disk copies by using the Copy Manager . Any virtual disk copy-related informatio n for the source virtual disk and the tar get virt ual disk is remov ed from the V irtual Disk P roperties dialog an d the Storage Array P rofile dialogs.[...]

Configuration: Premium Fe atur e—Upgrading to High–Performance T ier 183 12 Configuration: Premium Feature— Upgrading to High–Performance Ti e r The High P erformance Tier pr emium feature on an MD3600f Series array increases the performance of the system beyo nd that of an MD3600f S eries array operating at the standa rd performance le vel[...]

184 Configuration: Premium Feature—Upgrading to High–Performance T ier book.book Page 184 Friday, Sep tember 23, 2011 2:46 PM[...]

Configuration: Premium Feature— Remote Replication 185 13 Configuration: Premium Feature— Remote Replication The Remote Replication pr emium feature ena bles real-time r eplication of data between two storage arrays in separate lo cations. Using r emote replication, up to 16 r eplicated virtual disk pairs can be created on a storage array . A r[...]

186 Configuration: Premium Feature— Remote Replication Activating Remote Replication NOTE: If you ordered the Remote Replication feature, you received a Premium Feature Activation card in the Dell PowerV ault MD storage array shipping box. Follow the directions on the card to install and enable this feature. After the Remot e Replication featur e[...]

Configuration: Premium Feature— Remote Replication 187 Other information about re plication repository virtual disks include: • Specifying that replication repository virtual disks be cr eated f rom unconfigured fr ee capacity on the disk group, or cr eating a new disk group and its member re plication repository virtual disks from un configure[...]

188 Configuration: Premium Feature— Remote Replication Befor e creating a virtual disk pair , verify the following: 1 The Remote Replication premium fe ature is installed, en abled and activated on the primary and secondary storage arrays. 2 The storage arrays containi ng the two virtual disks you want to r eplicate are connected through a F ib r[...]

Configuration: Premium Feature— Remote Replication 189 Snapshot V irtual Disk W ith Remote Replication A snapshot virtual disk is a point-in- time image of a virtual disk. In a remote r eplication, do not mo unt a snapshot virtual disk on the same server as the primary virtual disk. V irtual Disk Copy Wit h Remote Replication The virtual disk cop[...]

190 Configuration: Premium Feature— Remote Replication Required Switch Zoning Configuratio ns NOTE: A limited set of Fibre Channel switches are supported by the storage array . For a complete list of supported switches and their required driver , BIOS and firmware levels, see the Configuring Fibre Channel wit h the Dell MD3600f-Series Storage Arr[...]

Configuration: Premium Feature— Remote Replication 191 Journaling File Sy stems and Remote Replication When using a journaling file system, y ou cannot gain r ead-only access to a r emote virtual disk. A journaling file system does n ot let you mo unt the r emote virtual disk in W indows NTFS. However , you can mount a snapshot of the r emote vir[...]

192 Configuration: Premium Feature— Remote Replication Activating the Remote Replicatio n Premium Fea ture and Creating Replicati on Virtual Disks T o activate the Remote Replication fe ature and cr eate the two r eplication repository virtual disks r equir ed, you can either : • Activate the feature, then cr eate the two replication virtual di[...]

Configuration: Premium Feature— Remote Replication 193 6 In the Select capacity table, select the physical disks and ca pacities for the new disk group, then click Next. The P review (Activate Remote R eplication) wizard is displayed. 7 Click Fi n i s h . The Completed (Activate Remote Re plication) message is displayed. 8 Click OK . The Remote R[...]

194 Configuration: Premium Feature— Remote Replication Creating a Remote Replication Befor e creating a r emote r eplication, en sur e that all prer equisites are met. See "P rer equisites" on page 191 for mor e information. 1 Open the AMW of both the local and remote storage array . 2 V erify that the Remote Replication pr emium featur[...]

Configuration: Premium Feature— Remote Replication 195 Selecting the Secondary Virtual Disk CAUTION: Creating a replicated virtual disk pair starts a process between the primary and secondary virtual disks that overwrites al l existing data on the secondary virtual disk and set the disk to read-only access. If you have existing data on your secon[...]

196 Configuration: Premium Feature— Remote Replication also specify whether to use a write consistency group option. A write consistency group ensure s that the se condary virtual disk receives write requests in the sequence initiated by the RAID controller module of the primary virtual disk. The secondar y virtual disk can also be added to a wri[...]

Configuration: Premium Feature— Remote Replication 197 • Manual resynchroniz ation (r ecommended)—The replicated pair must be manually resynchronized each time communication is restor ed between unsynchron ized replicated virtual disks. 3 Click Next . The P review (Create Remote R eplication) wizard is displayed. Go to "Completing the Re[...]

198 Configuration: Premium Feature— Remote Replication RAID Controller Modu le Ownership/Preferre d Path During a remote r eplication operation, the R AID controller module that owns the primary vir tual disk must correspond to the R AID controller owning the secondary volume on the r emote array . If both virtual disk s do not have the same pr e[...]

Configuration: Premium Feature— Remote Replication 199 Viewing the Storage Array Profile The Storage Array Pr ofile displays the most detailed information about the components of a r emote repl ication an d the replication r epository virtual disks. Y ou can: • View detailed information about individual and paired virtual disks in a re mote rep[...]

200 Configuration: Premium Feature— Remote Replication Vi ewing the Properti es Pane The P roperties pane is a view-only display of the physical and logical characteristics of a single virtual disk in a r eplicated pa ir , or a single replication r epository virtual disk. T o view the P roperties pane: 1 In the AMW , select the Lo gi ca l tab. 2 [...]

Configuration: Premium Feature— Remote Replication 201 V iewing the Phy sical Components or Logical Elements of the Prima ry Vi r t u a l D i s k T o view the physical components or logical elements of the primary virtual di s k i n a re mo t e re p li c a ti o n : 1 In the AMW of the s torage array that contains th e primary virtual di sk, selec[...]

202 Configuration: Premium Feature— Remote Replication Virtual Disk Status Icons In the Devices tab on the EMW , the following ic ons depict the status of each virtual disk: Changing W rite Mode an d Consistenc y Group Membership T able 13-1. Write Mode and C onsistency Group Membership Icon Status Replication r epository virtual disk Pr i m a r [...]

Configuration: Premium Feature— Remote Replication 203 The write mode of a remote r eplication is selected when it is cr eated. However , you can chan ge the write mode in a remote r eplication at a la ter time, as well as change the secondary virtual disk's membershi p in a write consistency group. F or mor e inform ation about write modes [...]

204 Configuration: Premium Feature— Remote Replication Resynchronizing V irtual Disks There ar e two r esynchronization methods for r emote replications: • Manual resynchronization—See " Manually Res ynchronizing Virtual Disks" on page 208. • Automatic r esynchronization—See "Automatically Resynchronizing Virtu al Disks&quo[...]

Configuration: Premium Feature— Remote Replication 205 The communication between a p rimary and second ary virtual disks can b e suspended or become unsynchronize d. If commun ication between the primary virtual disk and the seco ndary virtual disk is disrupted: 1 The status of the replicated pair changes to Unsynchronized . 2 A Needs Attention s[...]

206 Configuration: Premium Feature— Remote Replication • Changing the segment size of a virtual disk • Defragmenting a disk group • Adding free capacity to a disk group • Changing the R AID level of a d isk group T o change the synchronization priority and m ethod for an ex isting remote repl ication: 1 In the AMW of the storage array con[...]

Configuration: Premium Feature— Remote Replication 207 Unsynchronized Virtual Disks Communication between a primary and se condary virtual disks can be either suspended, or become unsynchronized. If this communication between both virtual disk s is disrupted: 1 The status of the replicated pair changes to Unsynchronized . 2 A Needs Attention stat[...]

208 Configuration: Premium Feature— Remote Replication Automatically Resynchronizing Virtual Disks When automatic r esynchronization is se lected, the R AID controller module owning the primary virtual disk automati cally starts resynchronizing the data on the remote r e plication pair immedi ately after communica tion is restor ed. NOTE: When ch[...]

Configuration: Premium Feature— Remote Replication 209 Reversing Roles Between the Primary and Seconda ry Virtu al Disks Reversing the roles between t he virtual disks promotes the secondary virtual disk to the role of primar y virtual disk and demotes the primary virtual disk to the role of secondary virt ual. If the pr imary virtual disk in a r[...]

210 Configuration: Premium Feature— Remote Replication Promoting the Se condary V irtual Disk or Demot ing the Primary V irtual Disk T o promote the seco ndary vi rtual disk to the role of primary virtual disk, or demot e the prima ry virtual disk to the role of secondary virtual disk : 1 In the AMW of the storage array that contains the virtual [...]

Configuration: Premium Feature— Remote Replication 211 Resuming a Remote Replication 1 In the AMW of the storage array with the primary virtual disk, select the Log ic al tab. 2 In the Lo gi ca l pane, right-click the primary virtual di sk of the replicated pair , then s elect Re s u m e Re p l i c a t io n . The R esume Replicated P air dialog i[...]

212 Configuration: Premium Feature— Remote Replication After the r emote virtual disk r eplicat ion r esumes, data is automatically written to the secondary vi rtual disk. Only the r egions of the primary virtual disk that changed since the replicated pair was suspended are written to the secondary virtual di sk. CAUTION: Possible loss of data ac[...]

Configuration: Premium Feature— Remote Replication 213 Deleting a Virtual Disk From a Replicated Pair in a Storage Array F o llow these steps to delete either a primary virtual disk, a secondary vi rtual disk, or bo th virtual disks from a r eplicated pair in a stora ge array . NOTE: Do not remove a replication relationship to back u p a replicat[...]

214 Configuration: Premium Feature— Remote Replication Deleting a Secondary V irtual Disk NOTE: Depending on which premium features are enabled on the storage array , deleting a secondary virtual disk may delete a ll associated virtual disks, resulting in a possible loss of data on those virtual disks. NOTE: Y ou cannot delete a secondary virtual[...]

Configuration: Premium Feature— Remote Replication 215 Deleting a Secondary Virtual Disk in a Replicated Pair From a Storage Array 1 Stop all I/O activity on the secondary virtual disk and unmount an y file systems on the secondary virtual disk. 2 In the AMW of the storage array that contains the secondary virtual disk, select the Log ic al tab. [...]

216 Configuration: Premium Feature— Remote Replication T o r emove remote r eplication from a st orage array : 1 In the AMW of the storage array containing the primary virtual disk, sel ect the Lo gi c al tab. 2 In the Lo gi c al pane, right-cl ick the primary virt u al disk of a r eplicated pair , then select R emove R eplication Rel ationship .[...]

Configuration: Premium Feature— Remote Replication 217 Disabling the Remote Replication Premium Feature Before disabling th e Remo te Repli catio n premium feature, all r emote virtual disk r eplications mus t are removed on the storage arr ay . See "Disabl ing the Remote Re plication P remiu m F eatur e" on page 217. NOTE: T o re-enabl[...]

218 Configuration: Premium Feature— Remote Replication book.book Page 218 Friday, Sep tember 23, 2011 2:46 PM[...]

Configuration: Device M apper Multipath for Linux 219 14 Configuration: Device Mapper Multipath for Linux Overview The MD3600f Serie s storage arra y uses a Linux opera ting system software framework , known as Device Mapper (DM), to enable multipath capabilities on Linux Host Servers. The DM multip ath functionality is provided by a combination of[...]

220 Configuration: Device Mapper Multipath for Linux Using DM Multipathing Devices NOTE: Using or modifyin g any nodes other than the multipathi ng device nodes can result in array or file sy stem problems, including loss of communication with the array and corruption of the file sy ste m. Avoid accessing any device other than the multipathing devi[...]

Configuration: Device M apper Multipath for Linux 221 Device Mapper Con figuration Steps T o complete the DM multipathing configuration and make the storage available to the Linux host server : 1 Scan for virt ual disks. See "Scan for Newly Added Virtual Disks" on page 221. 2 Display the multipath device topol ogy . See "Display the [...]

222 Configuration: Device Mapper Multipath for Linux Display the Multipath Device T opology Us ing the Multipath Command The multipath command adds newly sca nned and mapped virtual disks to the Device Mapper tables and cr ea tes entries for them in the /dev/mapper dir ectory on the host server . Thes e devices ar e the same as any other block devi[...]

Configuration: Device M apper Multipath for Linux 223 _ round-robin 0 [prio=1][enabled] _ 6:0:0:22 sdcl 69:144 [active][ghost where: mpathb is the name of the virtual device cr eated by device mapper . It is located in the /dev/mapper directory . DELL is the vendor of the device MD36xxf is the model of the device Sdx is the physical path to the o[...]

224 Configuration: Device Mapper Multipath for Linux The following examples provide information about the general mapping formats: On RHEL host s, a partit ion node has the for mat /dev/mapper/mpath<x>p<y>, where <x> is the alphabetic number for the multipathing device, <y> is the partition number for this device. On SLES 11[...]

Configuration: Device M apper Multipath for Linux 225 Blacklist Local Drive in Multi-path Driver If your multipath drivers are connecting to storage ar ea networks (SANs), it may be useful to be able to ex clude or "b lacklist" certain devices in your /etc/multipath.conf file. Blacklisting pr events the multipath driver from attempting to[...]

226 Configuration: Device Mapper Multipath for Linux CAUTION: Certain commands, such as lsscsi, di splay s one or more instances of Universal Xport devices. These device nodes must never be accessed, mounted, or used in any way . Doing so could cause loss of communication to the storage array and possibly cause serious damage to the storage array ,[...]

Configuration: Device M apper Multipath for Linux 227 Limitations and Known Issues • In certain error con ditions with the no_pa th_r etry or the queue_if_no_path feature is set, applications may hang. T o over come these conditions the you must ente r the followi ng command for each affected multipath device: dmsetup message [device] 0 "fai[...]

228 Configuration: Device Mapper Multipath for Linux T roubleshooting Question Answer How can I check if multipathd is running? Ru n t h e f o l l o w i n g c o m m an d /etc/init.d/multipathd statu s Why does the multipath –ll command output not show any devices? F irst verify if the devices are discover ed or not. The command #cat /proc/scsi/sc[...]

Management: Firmware Downloads 229 15 Management: Firmware Downloads Downloading RAID Controller and NVSRAM Packages A version number exists for each firm ware file. Th e vers ion num ber indicates whether the firmware is a major versio n or a m inor version. Y ou can use the Enterprise Management W indow (EMW) to download and ac tivate both t he m[...]

230 Management: Firmware Downloads Downloading Both RAID Controller and NVSRAM Firmware NOTE: I/O to the array can continue while y ou are upgrading RAID controller and NVSRAM firmware. NOTE: Dell recommends that the firmware and NVSRAM be upgraded during a maintenance period when the array is not being used for I/O. NOTE: The RAID enclosure must c[...]

Management: Firmware Downloads 231 7 Click Tr a n s f e r . K eep these guidelines in mind: •I f t h e Tr a n s f e r button is inactive, e nsure that you either select an NVSR AM file or deselect th e T ransfer NVSR AM file with R AID controller module firmware option. • If the file selected is not valid or is not compatible with the curr ent [...]

232 Management: Firmware Downloads 12 T o locate the dir ectory in which the file to download r esides, click Browse in the Select files area. The Select F ile dialog is displ ayed. 13 Select the file to download. 14 Click OK . 15 If you want to downloa d the NVSR AM file with the R AID controller module firmwar e, select Download NVSR AM file with[...]

Management: Firmware Downloads 233 2 P erform one of these actions: • Select Advanced  Maintenance  Download  RA I D C o n t r o l l e r Module NVSRAM • Select the Support tab, and click Download F irmware . In Select download task , select Download R AID controller module NVSR AM and click OK . An error message is di splayed. Click OK[...]

234 Management: Firmware Downloads NOTE: The Details pane shows the details of only one storage array at a time. If you select more than one storage array in the Storage array pane , the details of the storage array s ar e not shown in the Details pane. 9 Click NVSR AM in the Download ar ea. NOTE: If you select a storage array that cannot be upgrad[...]

Management: Firmware Downloads 235 Downloading Phy sical Disk Firmware CAUTION: When updating phy sical disk firmware, you must stop all I/O activity to the array to prevent data loss. The physical disk firmware controls vari ous features of the physical disk. The disk array controller (D AC) uses this type of firmware. Physical di sk firmw are sto[...]

236 Management: Firmware Downloads T o download Phy sical Disk F irmware: 1 F rom the AMW , select Advanced  Maintenance  Download  Physical Disk . The Download Physical Disk - Introduction window is displayed. 2 Click Next . The Download Physical Disk F irmware - Add P ackages window is displayed. 3 In the Selected P ackages ar ea, click [...]

Management: Firmware Downloads 237 Downloading MD1200 Series Expansion Module EMM Firmware NOTE: Due to a limitation with Linux, expansion enclosure EM M firmware updates must be performed using out-of-band management only . Failure to do so may result in the host server becoming unrespons ive, and it ma y require a reboot. Y ou can transfer a down[...]

238 Management: Firmware Downloads NOTE: If you click Stop while a firmware download is in progress, the download-in-progress finishes before t he operation stops. The sta tus for the remaining expansion enclosures changes to Canceled . Monitor the progress and completion status of the download to the expansion enclosures. The progress and status o[...]

Management: Firmware Downloads 239 Media Errors and Unreadable Sectors If the R AID controller detects a medi a error while accessing dat a from a physical disk that is a member of a disk group with a redundant R AID level (R AID 1, RAID 5 or RA ID 10), the contro ller tries to r ecover the data from peer disks i n the d isk group and uses recover [...]

240 Management: Firmware Downloads book.book Page 240 Friday, Sep tember 23, 2011 2:46 PM[...]

Management: Installing Array Compone nts 241 16 Management: Installing Array Components Recommended T ools Y ou may need the f ollowing items to pe rform the procedur es in this section: • Key to the system k eylock •# 2 P h i l l i p s s c r e w d r i v e r •W rist grounding stra p book.book Page 241 Friday, Sep tember 23, 2011 2:46 PM[...]

242 Management: Installing Array Componen ts Front Bezel (Optional) Removing the Front Bezel 1 Using the system key , unlock the front bezel (if lock ed). 2 Lift up the r elease latch next to the keylock. 3 Rotate the left end of the be zel away from the front panel. 4 Unhook the right end of the bezel and pull the bezel away from the system. Figur[...]

Management: Installing Array Compone nts 243 Hard Drives SAFETY : Models AMT , E03J, and E04J Models AMT , E03J, and E04J ar e intended for installation only in restricted access locations as defined in cl 1.2.7.3 of IEC 60950-1:2005. Depending on your configur ation, your array either supports up to twenty f o u r 2 . 5 " S A S ha rd d r i v [...]

244 Management: Installing Array Componen ts Figure 16-3. Removing and Installing a 2. 5" Hard-Drive Blank (MD3620f Only) Installing a Hard -Drive Blank 1 If installed, r emove the front bezel . See "Removing the F ront Bezel" on page 242. 2 Insert the hard-drive blank into the dr ive bay until the blank is fully seated. 3 Close the [...]

Management: Installing Array Compone nts 245 If the drive is online, the green activity/ fault indic ator flashe s as the drive is powere d down. When the drive indica tors are off, the drive is re ady for re m o v a l . 3 P r ess the release button to open the drive carrier release handle. See F igure 16-4. 4 Slide the hard drive out until it is f[...]

246 Management: Installing Array Componen ts Installing a Hard Drive CAUTION: Many repairs may only be done by a certified se rvice technician. Y ou must only perform troublesh ooting and simple repairs as authorized in your product documentation, or as dir ected by the online or telephone service and support team. Damage due to servicing that is n[...]

Management: Installing Array Compone nts 247 Removing a Hard Drive From a Hard-Drive Carrier Remove the scre ws from the slide rails on the har d-drive carrier and separate the har d drive from the carrier . See F igure 16-5 for P owerV ault MD3600f and F igure 16 -6 for P owerV ault MD3620f. Figure 16-5. Removing and Installing a Hard Drive Into a[...]

248 Management: Installing Array Componen ts Figure 16-6. Removing and Installing a Hard Drive Into a 2.5" Hard-Drive Carrier 1 screws (4) 2 hard drive 3 SAS screw hole 4 hard-drive carrier 2 1 3 4 book.book Page 248 Friday, Sep tember 23, 2011 2:46 PM[...]

Management: Installing Array Compone nts 249 Installing a Hard Drive Into a Hard-Drive Carrier 1 Insert the hard dr ive into the hard-d rive carrier with the connector end of the drive at the back. See F igure 16-5. 2 Align the scre w holes on the har d driv e with the back set of holes on the hard-drive carrier . When aligned correctly , the back [...]

250 Management: Installing Array Componen ts 5 Connect all the power cables to the array . 6 T urn on the array and the host server . Figure 16-7. Removing and Installing a RAID Controller Module Blank Installing a RAID Controller Module Blank T o install a R AID controller module blank: 1 Align the blank with the R AID controller module bay 2 Inse[...]

Management: Installing Array Compone nts 251 Removing a RAID Controller Module CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting and simple repairs as authorized in your product documentation, or as direct ed by the online or telephone service and support team. Damage due to servicing t[...]

252 Management: Installing Array Componen ts Figure 16-8. Removing and Instal ling a RAID Controller Module Installing a RAID Controller Module WA RN I N G : Fiber optic cables are fragile. Bendi ng, twisting, folding, or pinching fiber optic cables can cause d amage to the cables, degraded performance, or loss of data. T o prevent damage, do not t[...]

Management: Installing Array Compone nts 253 3 Connect all the cables to the RAID co ntroller module. If SFP transceivers and fiber optic cabl es were pr esent, reinstall them in the correct ports. 4 If applicable, update the firmware for the RAID controller module. F or information about the latest firmware, see support.dell.com . Opening the RAID[...]

254 Management: Installing Array Componen ts Figure 16-9. Opening and Closi ng the RAID C ontroller Module Closing the RAID Controller Module CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting a nd simple repairs as authorized in your product documentation, or as directed by the online o[...]

Management: Installing Array Compone nts 255 RAID Controller Module Backup Battery Unit Removing the RAID Controller Module Backup Battery Unit CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the onl ine[...]

256 Management: Installing Array Componen ts Installing the RAI D Controller Modul e Backup Battery Unit CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting a nd simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team.[...]

Management: Installing Array Compone nts 257 Power Supply/Cooling Fan Module NOTE: Y our storage array includes two integrated, hot-swappable power supply/cooling fan modules. The array supports two hot-swappabl e power supply/cool ing fan modules. While the array can operate tempo rarily with one module, both the modu les must be present for prope[...]

258 Management: Installing Array Componen ts Figure 16-11. Removing and Installing a Power Supply/Cooling Fan Module I n s t a l l i n g a P o wer Supply/Cooling Fan Module CAUTION: Man y repairs may only be done by a cer tified service techni cian. Y ou must only perform troubleshooting a nd simple repairs as authorized in your product documentati[...]

Management: Installing Array Compone nts 259 Figure 16-12. Securing the Power Cable CAUTION: When connecting the power cable, secure the cable with the velcro strap. NOTE: If the array is powered on, all the power supply LEDs remain off until the AC power cable is connected to the power supply/cooling fan module and the power switch is turned on. 4[...]

260 Management: Installing Array Componen ts 4 Slide the control panel out of the chassi s after: – Pushing the release tab towar d the front of the array in Po w e r V a u l t MD3600f . See F igure 16-13. – Pulling the r elease pin toward the front of the array in Po w e r V a u l t MD3620f . See F igure 16-14. Figure 16-13. Removing and Insta[...]

Management: Installing Array Compone nts 261 Figure 16-14. Removing and Installing t he Control Panel-PowerV ault MD3620f Installing the Control Panel 1 Align the control pane l with the slot on the array . 2 Slide the control panel into the array until: – The r elease tab clicks into place in P owerV ault MD36 00f . See F igure 16-13 . – The r[...]

262 Management: Installing Array Componen ts Backplane CAUTION: Many repairs may only be done by a certified se rvice technician. Y ou must only perform troublesh ooting and simple repairs as authorized in your product documentation, or as dir ected by the online or telephone service and support team. Damage due to servicing t hat is not authorized[...]

Management: Installing Array Compone nts 263 Figure 16-15. Removing and Installing the RA ID Controller Modul e/Power Supply Cage 1 screws (6) 2 RAID controller module/power supply cage 2 1 book.book Page 263 Friday, Sep tember 23, 2011 2:46 PM[...]

264 Management: Installing Array Componen ts Figure 16-16. Removing and Installi ng the Backplane-PowerV ault MD3600f Figure 16-17. Removing and Installi ng the Backplane-PowerV ault MD3620f 1 screws (5) 2 backplane 3 captive screw 1 screws (4) 2 backplane 3 captive screw 2 1 3 2 1 3 book.book Page 264 Friday, Sep tember 23, 2011 2:46 PM[...]

Management: Installing Array Compone nts 265 Installing the Backplane 1 Align the holes on the backplane wi th the holes on the array . 2 Tighten the captive s crew to secure the backplane to the chassis. Se e F igure 16-16 for P owerV ault MD3600f or F igure 16-17 for P owerV ault MD3620f. 3 Replace the screws that secur e th e backplane to the ch[...]

266 Management: Installing Array Componen ts book.book Page 266 Friday, Sep tember 23, 2011 2:46 PM[...]

Management: Firmware Inventory 267 17 Management: Firmware Inventory A storage array is made up of many components, which may include R AID controller modules, physical disks, and enclo sur e management modules (EMMs). Each of these components co ntains firmware. Some versions of firmware ar e dependent on other ve rsions of firmwar e. T o capture [...]

268 Management: Firmware Inventory book.book Page 268 Friday, Sep tember 23, 2011 2:46 PM[...]

Management: Sy stem Interfaces 269 18 Management: Sy stem Interfaces Microsoft Services V irtual Disk Service The Microsoft V irtual Disk Service (VDS) is a component of t he W indows operatin g system. The VDS co mponent util izes thir d-party vendor s pecific software modules, known as providers, to access and configur e third-party storage resou[...]

270 Management: Sy stem Interfaces VSS attaches to the service and uses it to coor dinate the cr eation of snapshot virtual disks on the storag e array . VSS-initiated snap shot virtual disks c an be triggere d through backup to ols, known as requestors. The VSS P rovider Configuration T ool offers the following configuration o ptions: • Snapshot[...]

T roubleshooting: Y our Storage Array Software 271 19 T roubleshooting: Y our Storage Array Software Start–Up Routine L ook and listen during t he array ’s start-up routine fo r the indications described in T able 19-1. F o r a descri ption of the front- and back-panel indicators, see "Planning: About Y o ur Storage Array" on page 25.[...]

272 T roubleshooting: Y our Storage Array Software T o launch the AMW , perform on e of these actions: •O n t h e Devices tab, in either the T r ee view or the T able view , double-click a storage array . Alternatively , you can right-click a storage array and select Manage Storage Array from the pop-up men u. •O n t h e Setup tab, select Manag[...]

T roubleshooting: Y our Storage Array Software 273 In the T a ble view , every managed sto rage array is listed once, r egardless of the number of attachment s it has in the T ree view . After the storage array is contacted by MDSM, an icon representing i ts h a rd wa re s t a tu s i s d i sp l a ye d . Hardwar e status can be Optimal, Needs Attent[...]

274 T roubleshooting: Y our Storage Array Software NOTE: MDSM may take a few minutes to update a status change to Unresponsive or from Unresponsive. A status change from or to Unresponsive depends on th e network link to the storage array . All other status change updates faster . Storage Array Support Data Y ou can gather various type s of invento[...]

T roubleshooting: Y our Storage Array Software 275 2 Enter a name for the support data file in Specify filename or click Browse to navigate to a previously saved file to overwrite an existing file. The suffix .zip is added automatically to the file if you do not specify a suffix for the fil e. 3 Enter the Execution summary . 4 Click Start . After a[...]

276 T roubleshooting: Y our Storage Array Software Collecting the Phy sical Disk Data Y ou can use the Collect Physical Disk Da ta optio n to colle ct log sens e data from all the physical disks on your storage array . L og sense data consists of statistical informat ion that is mainta ined by each of the physical disks in your stor age array . Y o[...]

T roubleshooting: Y our Storage Array Software 277 Event Log Y ou can use the Event Log V iewer to view a detailed list of events that occur in a storage array . The event log is stored on r eserved areas on the storage array disks. I t recor ds configuration events and storage arr ay component failur es. The event log can be used as a supplemen ta[...]

278 T roubleshooting: Y our Storage Array Software Recovery Guru The Recovery Guru is a component of MDSM tha t diagnoses critical even ts on the storage array and recommends step-by-st ep re covery proc edures to res olve the problems. In the AMW , to display the Recovery Guru, perform one of these actions: •C l i c k Rec o v er y G ur u . •I [...]

T roubleshooting: Y our Storage Array Software 279 2 P erform one of these actions in the Storage Array P rofile dialog: • View detailed information—Go to step 3. • Search the storage array profile—Go to step 4. • Save the storage array profile—Go to step 5. • Close the storage array profile—Go to step 6. 3 Select one of the tabs, a[...]

280 T roubleshooting: Y our Storage Array Software e In Fi l e N a m e , type the file name of your choice. T o associate the file with a particular software application that is displayed it, specify a file extension, such as .txt. NOTE: The file is saved as ASCII text. f Click Save . 6 T o exit the storage array profile, click Close . F or more in[...]

T roubleshooting: Y our Storage Array Software 281 V iewing the Phy sical Associations Y ou can use the Associated Physical Co mponents option to view the physical components that are a ssociated with s o urce virtual disks, snapshot virtual disks, snapshot repository virtual disks, disk groups, unconfigur ed capacity , and free capacity in a s tor[...]

282 T roubleshooting: Y our Storage Array Software T o find nodes: 1 In the AMW , select Vi e w  Fi n d . 2 Based on the type of sear ch, select one of these options, and go to the indica ted step : • Search by name—see step 3. • Search by special criteria—see step 4. 3 T ype the name of the node to be f ound in Fi n d N o d e . See step[...]

T roubleshooting: Y our Storage Array Software 283 c Specify that the free capacity to be matched is less than, equal to, or gr eater than the capacity enter ed in the GB box. d Go to step 8. 8 Click Fi n d N e x t . T o see every node that matches t he criteria, click Fi n d N e x t repeatedly . If no matches are found, the Search F ailed dialog i[...]

284 T roubleshooting: Y our Storage Array Software 4 Select Vi e w  Go T o  Source V irtual Disk . The selection jumps to the associated source virtual disk in the Lo gi c al pane. 5 Select Vi e w  Go T o  Ta r g e t V i r t u a l D i s k . NOTE: If the source virtual disk has more than one associated target virtual disk, select the tar[...]

T roubleshooting: Y our Storage Array Software 285 7 If the verification is successful , see step 8, if not, see step 9. 8 Remove the storage array with the Un responsive status f rom the EMW , and select Add Storage Array to add the storage arr ay again. 9 If the storage array does not return to Optimal status, check the Eth ernet cables to ensure[...]

286 T roubleshooting: Y our Storage Array Software 20 If the problem still e xists, mak e the appropriate host modifications, check with other administrators to see if a f irmwar e upgrade was performed on the R AID controll er module from another s torage management sta tion. If a firmware upgrade was pe rformed, the EMW on your management station[...]

T roubleshooting: Y our Storage Array Software 287 Locating a Phy sical Disk Y ou can use the L ocate Physical Disk op tion to physically locate and identify one or more of the physical disks in an e xpansion enclosure by activating physical disk LEDs. T o locate the physical disk: 1 Select the Physical tab. 2 Select the physical disks that you wan[...]

288 T roubleshooting: Y our Storage Array Software T o locate the expansion enclosur e: 1 Select the Physical tab. 2 Select a physical disk in the expansion enclosure that you want to locate. 3 Select Physical Disk  Blink  Expansion Enclosure . The LED or LEDs on the e xpansion en closure or physical disks come on. 4 When you have located the[...]

T roubleshooting: Y our Storage Array Software 289 Use the convention filename.dmp for the name of the file. The suffix .dmp is added to the file automaticall y if you do not speci fy a suffix for the file. 4 Click Start . NOTE: Each test shows a status of Executi ng while it is in progress. The test then shows Completed when it successfully finish[...]

290 T roubleshooting: Y our Storage Array Software SMrepassist -f E: NOTE: In Windows, the mount point path is a drive letter . An error message is displayed in the command line when the utility cannot distinguish between the following: • Source virtual disk and snapshot virtua l disk (for e xample, if the snapshot virtual disk is removed). • S[...]

T roubleshooting: Y our Storage Array Software 291 3 If you have an in-band storage array , use the following procedure. Click Re f r e s h after each step to check the results: a Ensure that the host context agent softwar e is installed and running. If the host is started befor e it is connected to the controllers in the storage array , the host c[...]

292 T roubleshooting: Y our Storage Array Software b Remove the storage array with the unresponsive status from MDSM, and add that storage array again. If the storage array r eturns to optimal status, you have completed this procedure. c Examine the ethernet cables to en sure that you cannot see any damage and that they are tightly connected. d Ens[...]

T roubleshooting: Y our Storage Array Software 293 Starting or Restarting the Host Context Agent Software The host conte xt agent softwar e module is the softwar e component that r esides on the server or manage ment station th at commun icate s with the MD3600f series storage arrays. The SMag ent software automatically starts after you reboot the [...]

294 T roubleshooting: Y our Storage Array Software Copyright (C) 2009-2010 Dell, Inc. All rights reserved. Checking device <n/a> (/dev/sg10): Activating Checking device /dev/sdb (/dev/sg11): Skipping Checking device <n/a> (/dev/sg3): Activating Checking device <n/a> (/dev/sg4): Activating Checking device <n/a> (/dev/sg5): Ac[...]

T roubleshooting: Y our Array 295 20 T roubleshooting: Y our Array Safety First—For Y ou and Y our Array CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting and simple repairs as authorized in your product documentation, or as direct ed by the online or telephone service and support tea[...]

296 T roubleshooting: Y our Array Equip yourself with antistatic protection and a r eplacement small form-factor pluggable (SFP) transceiver before r eplacing an SFP transceiver in the RAID controller module. Also , see the initial setup information for the enclosur e to verify LED definitions. 1 If possible, use the storage management softwar e to[...]

T roubleshooting: Y our Array 297 Figure 20-1. Removing an SFP Module 7 Install the new SFP transc eiver into the interface port. Ensure that the transceiver is properly seated. 8 Reconnect the fiber optic cable. 9 V iew the FCIN speed LEDs and the Physical Disk Channel speed LEDs. Based on the LED status, perform one of these actions: • At least[...]

298 T roubleshooting: Y our Array T roubleshooting External Connections • V erify that the cables are connec ted to the correct ports befor e troubleshooting any extern al devices. T o locate the back-pane l connectors on your array , see F igur e 3-1. • Ensure that all the cables ar e securely attached to the e xternal connectors on your array[...]

T roubleshooting: Y our Array 299 CAUTION: Power supply/cooling fan modules are hot-swappable. The array can operate on a single power supply; however both modules must be installed to ensure proper cooling. A single power s upply/cooling fa n module can be removed from a powered-on array for a maximum peri od of 5 minutes. Beyond that time, the ar[...]

300 T roubleshooting: Y our Array T roubleshooting Expansion Enclosure Management Modules CAUTION: Many repairs may only be done by a certified se rvice technician. Y ou must only perform troublesh ooting and simple repairs as authorized in your product documentation, or as dir ected by the online or telephone service and support team. Damage due t[...]

T roubleshooting: Y our Array 301 d T urn on the server . e Check the lin k status LED. If the li nk st atus LED is not green, replace the cables. If the problem is not r esolved, see " Ge tt in g He l p" o n pa g e 3 09 . T roubleshooting RAID Controller Modules CAUTION: Many repairs may only be done by a certified service technician. Y [...]

302 T roubleshooting: Y our Array • If both LEDs for an y given FCIN port are unlit, see "T roubleshooting Arra y and Expansion Enclosure Connections" on page 303. a T urn off the server , storage arrays, and expansion enclosur es. b Reseat the RAID controller module and reconnect cables on the storage array and the server . c Restart t[...]

T roubleshooting: Y our Array 303 T roubleshooting Array and Expansion Enclosure Connections 1 V er if y th a t th e S A S O U T st a tu s LE D is g ree n an d th a t f o r e a c h F CI N po r t connected to a cable, at least one of th e paired LEDs is on. If this is not the case, see "Pl anning: RAID Controller Modules" on page 33. 2 Ens[...]

304 T roubleshooting: Y our Array T roubleshooting a Wet Storage Array CAUTION: Many repairs may only be done by a certified se rvice technician. Y ou must only perform troublesh ooting and simple repairs as authorized in your product documentation, or as dir ected by the online or telephone service and support team. Damage due to servicing t hat i[...]

T roubleshooting: Y our Array 305 T roubleshooting a Damaged Array CAUTION: Many repairs may only be done by a certified service technician. Y ou must only perform troubleshooting and simple repairs as authorized in your product documentation, or as direct ed by the online or telephone service and support team. Damage due to servicing that is not a[...]

306 T roubleshooting: Y our Array T roubleshooting RAID Controller Modules Conditions Certain events can cause a R AID controll er module to fail and/or shut down. Unrecoverable ECC memory or PCI errors, or critical physical conditions can cause lockdown. If your R AID storage ar ray is configured for r edundant access and cache mirroring, the su r[...]

T roubleshooting: Y our Array 307 PCI Errors The storage array firmwar e can detect an d only recover from PCI errors when the R AID con troller modules are configur ed for redundancy . If a virtual disk uses cache mirroring, it fail s over to its peer R AID controller module, which initiates a flush of the dirty cache. Critical Conditions The stor[...]

308 T roubleshooting: Y our Array book.book Page 308 Friday, Sep tember 23, 2011 2:46 PM[...]

Getting Help 309 21 Getting Help Contacting Dell F or cus tomers in the United States , call 800- WWW -DELL (800-9 99-3355). NOTE: If you do not have an active Inte rnet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. Dell provides several online and telepho ne-based support and se[...]

310 Getting Help book.book Page 310 Friday, Sep tember 23, 2011 2:46 PM[...]

Index 311 Index A Access Virtual Disk, 70 Advanced F eatur e Using Snaps hot and Disk Copy To g e t h e r, 5 9 Advanced F eatur es, 55 Snapshot Repository Virtual Disk, 5 7 Snapshot Virtual Disks, 5 6 Advanced P ath, 152 Array Management T ypes In-Band Manage ment, 6 9 Out-of -Band Management, 6 9 B backplane installing, 2 6 5 re m o v i n g , 2 6 [...]

Index 312 D Defining a Host, 90 Dell contacting, 3 0 9 Disk Group Creating, 1 0 2 Expansion, 1 3 8 Export, 1 4 0 E x p o r t i n g , 141 Import, 1 4 1 L o c a t i n g , 104 Migration, 1 4 0 Disk Group and V irtual Disk Expansion, 138 Disk Group Operations , 50 Defragmentation, 5 1 Expansion, 5 1 Limit, 5 1 RA I D L e ve l M i g r a t i o n , 5 0 Se[...]

Index 313 re m o v i n g , 2 4 4 Har d-Drive Indicator Pa t t e r n s , 3 0 H ard w a re F e a t u re s Back panel featur es, 2 9 F ront panel featur es, 2 6 Hard dr ive indicator patterns, 3 0 P ower indicator codes, 3 2 P ower supply and cooling fan features, 3 1 Host Group Adding, 9 3 Create, 9 3 Moving a Host, 9 4 Removing a host, 9 3 Removing [...]

Index 314 Vi rt u a l D i s k C o p y , 5 7 Monitoring P e rformance, 61 Multi-P ath P referre d and Alternate Controllers and P aths, 5 9 Multi-P ath Software, 59 N Non-Exportable Components, 140 O Other Information, 23 P phone numb ers, 309 Physical Disk Security with Self Encrypting Disk, 112 Physical Disk States, 42 Physical Disks, 42 Erasing S[...]

Index 315 har d drive from a drive carrier , 2 4 7 power supply/cooling fan module, 2 5 7 Removing Copy P airs, 182 Removing Host Access, 92 Restricted Mappings, 132 S Safety , 21 safety , 295 Security Key C h a n g i n g , 116 Creating, 1 1 4 Saving, 1 1 7 Segment Size, 47 Setting a P assword , 75 Setting Copy P riority , 178 Simple P ath, 149 SMA[...]

Index 316 Starting or Restarting the Host-Agent Softw are, 2 9 3 Start-Up Routine, 2 7 1 Storag e Array P rofile, 2 7 8 Storage Array Support Data, 2 7 4 Unidentified De vices, 2 9 0 Vi ew in g t h e L og i c a l A s s o c i a t i o n s , 280 Viewing the Physical A s s o c i a t i o n s , 281 troubleshooting, 295 connections, 3 0 3 cooling problems[...]

Index 317 V irtual Disks and Disk Groups, 43 Z Zoning Guidelines, 1 9 0 Switch Configurations, 1 9 0 book.book Page 317 Friday, Sep tember 23, 2011 2:46 PM[...]

318 Index book.book Page 318 Friday, Sep tember 23, 2011 2:46 PM[...]