NEC IS015-9E manual

NEC Storage Manager Data Replication User’s Manual (Function Guide) IS015-9E[...]

© NEC Corporation 2001-2 004 No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation. The contents of this book may be modified without notice in the fut ure.[...]

Preface This manual describes how to use the data replication function provided by NEC St orage DynamicDataRepl ication Ver2, NEC Storage Rem oteDataReplication Ver2, and NEC Storage R eplicationControl. The data replicat ion function consists of the replica tion volume creation function pr ovided in a disk array and software to manage and operate [...]

Description Corresponding Product Data Replication User’s Manual (Disaster Recovery System Installation and Operation Guide) NEC Storage Manager Data Replication User’s Manual (Disaster Recovery S ystem Installation and Oper ation Guide) (IS027) Snapshot User’s Manual (Function Guide) NEC Storage Manager Snaps hot User’s Manual (Function Gu[...]

i Contents Chapter 1 Data Replication Overvi ew ...................................................................................................... ......................... 1 1.1 Data Re plication ............................................................................................................... .....................................[...]

ii 3.3.1 Pai r Setting/Unpai r ............................................................................................................ ................................ 43 3.3.2 Re plicate ...................................................................................................................... ......................................[...]

iii 4.7.1 Logic al Disk Information Displ ay Command ....................................................................................... .......... 172 4.7.2 Pai r/Unpair Command ............................................................................................................ ......................... 175 4.8 Disk Array Operations ..[...]

iv This page is intention ally left blank.[...]

Chapter 1 Data Replication Overview 1 Chapter 1 Data Replication Overview To manage an enormous am ount of information accumulated in busine ss in a unified way and promote effectiv e and efficient utilization of the information, a h igh-throughput , large-capacity, and high-reli ability storage s ystem is required. Data Replication provides functi[...]

Chapter 1 Data Replication Overview 2 1 1 1 . . . 2 2 2 E E E x x x a a a m m m p p p l l l e e e s s s o o o f f f A A A p p p p p p l l l y y y i i i n n n g g g D D D a a a t t t a a a R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n When you introduce Data Repl ication and use rep lic ation volumes which can be separated, you c[...]

Chapter 1 Data Replication Overview 3 The procedure for backup from a replic ation volume is describ ed below. (1) During operation, the master volume (MV) and r eplication volume (RV) are conn ected. (2) Suspend the production task and separate the re plication volume (RV). Resume the task afte r separation is complete. (3) Use the separated repl [...]

Chapter 1 Data Replication Overview 4 1 1 1 . . . 2 2 2 . . . 2 2 2 T T T e e e s s s t t t E E E n n n v v v i i i r r r o o o n n n m m m e e e n n n t t t S S S e e e t t t t t t i i i n n n g g g You can set the same environment as the production task environment easily by creating rep lication volumes using the Data Replication function. You c[...]

Chapter 1 Data Replication Overview 5 1 1 1 . . . 2 2 2 . . . 3 3 3 P P P a a a r r r a a a l l l l l l e e e l l l P P P r r r o o o c c c e e e s s s s s s i i i n n n g g g o o o f f f S S S e e e a a a r r r c c c h h h O O O p p p e e e r r r a a a t t t i i i o o o n n n By creating replication volumes of the m aster data base, you can separa[...]

Chapter 1 Data Replication Overview 6 Disk Array • AccessControl • DynamicDataReplication • RemoteDataReplication DB Replication Backup Software ReplicationControl ReplicationControl Business Server Backup Server Management Server LAN Tape Drive Storage Manager 1 1 1 . . . 3 3 3 S S S y y y s s s t t t e e e m m m C C C o o o n n n f f f i i [...]

Chapter 1 Data Replication Overview 7 • Storage Man ager Provides the disk array configuratio n and state display functions. Installing DynamicDataReplic ation and/or RemoteDat aReplication allows the repl ication management function (hereinafter, referred to as th e Replic ation Management) incorporated in iS M. The Replication Management provid[...]

Chapter 2 Data Replication 8 Chapter 2 Data Replication This chapter describes the types and state transitions of volumes that are necessary to perform operation using the Data Replication function. 2 2 2 . . . 1 1 1 V V V o o o l l l u u u m m m e e e C C C l l l a a a s s s s s s i i i f f f i i i c c c a a a t t t i i i o o o n n n To create rep[...]

Chapter 2 Data Replication 9 Figure 2-1 Example of Volume Classification Volume A1/A2/B1 : IV Volume A3 : MV (PV) of the pair A3/A4 Volume A4 : RV (dRV) of the pair A3/A4, and MV of the pair A4/B2 Volume B2 : RV (rRV) of the pair A4/B2 Disk Array A Disk Array B MV (PV) A3 RV/MV (dRV) A4 RV (rRV) B2 Pair Setting FC IV A1 IV A2 IV B1[...]

Chapter 2 Data Replication 10 2 2 2 . . . 2 2 2 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s The replication operations include Replicate that repl icates data from MV to RV, Separate th at separates between MV and RV, and Restore that replicates data fr om RV to MV. 2[...]

Chapter 2 Data Replication 11 2 2 2 . . . 2 2 2 . . . 3 3 3 R R R e e e s s s t t t o o o r r r e e e This operation copies data from RV to MV. It is performed to restore data from the backup vo lume (RV) when a failure occurs in MV. When Restore is executed, the R V contents at the poi nt of starting Res t ore are refl ected copied into the MV. At[...]

Chapter 2 Data Replication 12 2 2 2 . . . 3 3 3 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s a a a n n n d d d S S S t t t a a a t t t e e e T T T r r r a a a n n n s s s i i i t t t i i i o o o n n n s s s This section describes the replic a tion operations and state [...]

Chapter 2 Data Replication 13 2 2 2 . . . 3 3 3 . . . 1 1 1 R R R e e e p p p l l l i i i c c c a a a t t t e e e a a a n n n d d d S S S t t t a a a t t t e e e T T T r r r a a a n n n s s s i i i t t t i i i o o o n n n s s s When Replicate is performed, data copy from MV to RV st arts to reflect the content of MV to RV. Any update to MV after Re[...]

Chapter 2 Data Replication 14 2 2 2 . . . 3 3 3 . . . 2 2 2 S S S e e e p p p a a a r r r a a a t t t e e e a a a n n n d d d S S S t t t a a a t t t e e e T T T r r r a a a n n n s s s i i i t t t i i i o o o n n n s s s When Separate is performed, the difference between MV and RV at the time of executing th e Separate start instruction is reflect[...]

Chapter 2 Data Replication 15 2 2 2 . . . 3 3 3 . . . 3 3 3 R R R e e e s s s t t t o o o r r r e e e a a a n n n d d d S S S t t t a a a t t t e e e T T T r r r a a a n n n s s s i i i t t t i i i o o o n n n s s s When Restore is performed, data copy from RV to MV starts to reflect th e content of RV at the beginning of Restore to MV. When Restor[...]

Chapter 2 Data Replication 16 2 2 2 . . . 3 3 3 . . . 4 4 4 A A A c c c t t t i i i v v v i i i t t t y y y S S S t t t a a a t t t e e e a a a n n n d d d S S S y y y n n n c c c h h h r r r o o o n n n o o o u u u s s s S S S t t t a a a t t t e e e In data replicatio n, Replicate, Restore, and Separate states are ca lled “activit y states”, [...]

Chapter 2 Data Replication 17 2 2 2 . . . 4 4 4 C C C o o o p p p y y y C C C o o o n n n t t t r r r o o o l l l S S S t t t a a a t t t e e e If the activity between volumes with the pair setting is the Replicate or Restore state, you can change the copy method of data between MV and RV according to th e load st atus of the disk array. The state [...]

Chapter 2 Data Replication 18 Copy control states c an be specified when Replicate or Restore is performed. You can als o change the copy control stat e you specified at Replicate or Restore as required. When Restore with RV protec tion specified is execu ted, only copy for reflecting t he difference is executed, thus the updated data of the MV is [...]

Chapter 2 Data Replication 19 2 2 2 . . . 5 5 5 R R R e e e l l l a a a t t t i i i o o o n n n s s s h h h i i i p p p b b b e e e t t t w w w e e e e e e n n n C C C o o o p p p y y y P P P e e e r r r f f f o o o r r r m m m a a a n n n c c c e e e a a a n n n d d d C C C o o o p p p y y y C C C o o o n n n t t t r r r o o o l l l S S S t t t a [...]

Chapter 2 Data Replication 20 2 2 2 . . . 6 6 6 R R R V V V A A A c c c c c c e e e s s s s s s R R R e e e s s s t t t r r r i i i c c c t t t i i i o o o n n n In the Replicate state and Restore state, MV is s ynchronized with RV to always match the volume data between MV and RV. Since the difference bet ween MV and RV is reflected in the disk ar[...]

Chapter 2 Data Replication 21 Note 3: If “Read Only (RO)” is set for RV for which Separate was completed, keep the following operational notes in mind. <On the Windows system> 1. If NTFS is used as a fil e system , reference to the RV is disabled. 2. If FAT16/FAT32 is used as a file system, asso ciate the file system wi th the drive by us[...]

Chapter 2 Data Replication 22 2 2 2 . . . 8 8 8 F F F r r r e e e e e e z z z e e e o o o f f f D D D i i i s s s k k k A A A r r r r r r a a a y y y s s s If the power to the disk array is turned off for ma intenance, acc ess to the disk arra y is disabled , disallowing to continue copy operation for the paired vol um es in the disk array. In this[...]

Chapter 3 Replication Management 23 Chapter 3 Replication Management This chapter des c ribes various operations of Data Replication by the Graph ical User Interface (GUI). 3 3 3 . . . 1 1 1 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n M M M a a a n n n a a a g g g e e e m m m e e e n n n t t t O O O v v v e e e r r r v v v i i[...]

Chapter 3 Replication Management 24 Table 3-1 lists the oper ations and state displays. Table 3-1 List of Display s/O perations of Data Replication Replication Management Operation Authorization Operation Item State Monitoring Configuration Setting Display L1 L2 L3 Set Disk Array Name √ √ √ - - - Set Logical Disk Name √ √ √ - - - Link S[...]

Chapter 3 Replication Management 25 Table 3-2 List of Repl ication-Related Events Operation Target Operation Replication Management Operation Other Operations Freeze { ∆ Defreeze { ∆ Disk array Change Background Copy level { ∆ Pair Setting/Unpair { ∆ Replicate { ∆ Synchronous State (rpl/sync) ∆ ∆ Separate { ∆ Separated ∆ ∆ Resto[...]

Chapter 3 Replication Management 26 3 3 3 . . . 1 1 1 . . . 3 3 3 N N N o o o t t t e e e s s s o o o n n n O O O p p p e e e r r r a a a t t t i i i o o o n n n Note the following points when operating replication management: [System Parameter Setting (on UNIX)] For more information, refer to the “User’s Manual (UNIX)”. [Messages at Start] I[...]

Chapter 3 Replication Management 27 3 3 3 . . . 2 2 2 E E E x x x p p p l l l a a a n n n a a a t t t i i i o o o n n n o o o f f f R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n S S S c c c r r r e e e e e e n n n To perform an operation , select t he volumes you want to perform the operation to in the Volume List Displayed on t[...]

Chapter 3 Replication Management 28 3 3 3 . . . 2 2 2 . . . 2 2 2 C C C o o o n n n f f f i i i g g g u u u r r r a a a t t t i i i o o o n n n D D D i i i s s s p p p l l l a a a y y y A A A r r r e e e a a a The configuration display area is under the monitoring by the iSM and displays the list and the state of the Disk Arrays that can use the Re[...]

Chapter 3 Replication Management 29 Disk Array icon Icon Description , , , etc. (in colors) Indicates that the disk arra y is norm ally operating. Indicates that the license c apacity of the DynamicDataRepli cation, RemoteDataReplication , or RemoteDa taReplic ation/Disa sterRecovery is insufficient. * If license capacity is insufficient, you canno[...]

Chapter 3 Replication Management 30 license • Unmanaged disk arrays 3 3 3 . . . 2 2 2 . . . 3 3 3 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n S S S c c c r r r e e e e e e n n n When click the [ Replication Information] tab in t he information lis t display ar[...]

Chapter 3 Replication Management 31 (i) Classification The volume types (volume attributes) are d isplayed. Displayed Icon Description (Green) MV. Indicates Master Volume which is the volume of re plicati on origin. (Light Blue) RV. Indicates Replication Vol ume which is the volume of replication target. (White) IV. Indicates Isolated Volume and is[...]

Chapter 3 Replication Management 32 (iv) Logical Disk Name The identification nam e or identifier (se e Note ) given for the logical disk is displayed. It is the same as the logical disk name displaye d in the main screen (State Monitoring screen) and can be changed f rom the main screen (State Monito ring screen). When the events given below have [...]

Chapter 3 Replication Management 33 (viii) Disk Array The identification nam e given to the Disk Arr ay including the volume indicated by “Pair Number” is displayed. It is the same as the Disk Arr ay Name displayed in the main screen (Stat e Monitoring screen), and can be changed f rom the main screen (State Monit oring screen). If the Replicat[...]

Chapter 3 Replication Management 34 (x) Copy Control State The con trol status i n copy ing is displ ayed. For more information, refer to 2.4 “Cop y Control State”. Display Description Foreground Copy Indicates the copy state in th e synchronous or semi-synchronous mode. Background Copy Indicates the asynchronous copy state b y difference manag[...]

Chapter 3 Replication Management 35 (xiv) Number of Pairs Indicates the number of related pairs. This valu e is equal to “the number of volumes which make up the pair link” minus 1. An example of pair relations and Number of Pairs is shown below. Number of Pairs Pair Relation Some replication operations cannot be carried out while in the Replic[...]

Chapter 3 Replication Management 36 3 3 3 . . . 2 2 2 . . . 4 4 4 D D D i i i s s s k k k A A A r r r r r r a a a y y y L L L I I I N N N K K K I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n S S S c c c r r r e e e e e e n n n When you click the [Disk Array LINK Information] tab in the information list displa y area, the link inf[...]

Chapter 3 Replication Management 37 (ii) LINK Disk Array Name Indicates the iden tification name a ssigned to the linked disk array. (iii) Path Number Indicates the con nection path number in the link. If the link is con nected via four paths, the path numbers are 0, 1, 2, and 3, respectively (refer to Figure 3-5 “Replication Link Info rmation”[...]

Chapter 3 Replication Management 38 Figure 3-5 shows an example of two disk arrays connected to Disk Array 1 for using RDR. The following shows an example of 3000/4000 series. Figure 3-5 Replication Link Information Disk Array 1 Disk Array 2 Disk Array 3 #00h #01h LINK Number Replication Director #05h #0dh Director Number Path #00h Path #01h Path #[...]

Chapter 3 Replication Management 39 3 3 3 . . . 2 2 2 . . . 5 5 5 M M M e e e n n n u u u I I I t t t e e e m m m L L L i i i s s s t t t The list of menu bar items of Replication Manage ment is shown below. For details, refer to description on each menu item. 3.3.13 “CSV Output of In formation List Display” 3.3.14 “Save Pair Setting Informat[...]

Chapter 3 Replication Management 40 3.3.8 “Forced Separate” 3.3.9 “Forced Unpair” 3.3.10 “Freeze/ Defreeze” 3.3.11 “Background Copy Level Change” For details on operations related to the AT-group, refer to the “Data Rep lication User’s Manual (Disaster Recovery System Installation and Op eration Guide)”. Displays Help on the R[...]

Chapter 3 Replication Management 41 3 3 3 . . . 2 2 2 . . . 6 6 6 I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n D D D i i i s s s p p p l l l a a a y y y e e e d d d o o o n n n E E E x x x e e e c c c u u u t t t i i i o o o n n n D D D i i i a a a l l l o o o g g g The Execution d ialog displayed for replication op erations ca[...]

Chapter 3 Replication Management 42 (iv) Logical Disk Name Displays the logical disk name of MV. (v) Copy Control State Displays the control state during copy. (vi) Sync State Displays the transition sta tus in the activity state. (vii) C opy Mode Displays the Synchronous/Semi-synchronous mode during copy operation. (viii) Number Displays the logic[...]

Chapter 3 Replication Management 43 3 3 3 . . . 3 3 3 V V V a a a r r r i i i o o o u u u s s s O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s o o o f f f R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n M M M a a a n n n a a a g g g e e e m m m e e e n n n t t t 3 3 3 . . . 3 3 3 . . . 1 1 1 P P P a a a i i i r r r S [...]

Chapter 3 Replication Management 44 [Operation Procedure] Pair Setting Do one of the following to display the Pair Setting screen. y Select a volume in the Replic ation Information screen, click [Operation] on the menu bar of the Replication screen, and then select [Pair Setting]. y Right-click in the Replication Information screen, and then select[...]

Chapter 3 Replication Management 45 Figure 3-9 shows an ex ample of the Pa ir Setting Screen. Figure 3-9 Example of Pair Setting Screen After the Pair Setting, th e copy operation such as Replicate, R estore etc. is available. (i) Data Replication Mode Select the method of setting pairs. Radio Button Description Dynamic Data Replication (within a D[...]

Chapter 3 Replication Management 46 ALL : All volumes becom e selectable objects. LD Set Name : Volum e s registered in the se lected LD Set bec ome selectable objects . Undefined : Volumes not registered in th e LD Set become selectable object s. (v) Logical Disk Select the Logical Disk whi ch you want to set. When you click the [Execute] button, [...]

Chapter 3 Replication Management 47 From the list, select a pair you want to unpair, and then click the [Execute] button. You can select m ultiple executable pairs and execute them in a batch. Unexecutable pairs cannot b e selected. (i) Selected Volume Lis t Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation[...]

Chapter 3 Replication Management 48 [Execution Conditions] To Pair setting or Unpair, th e foll owing conditions must be satisfied. Conditions for Pair setting Volumes in which the pair setting is perfo rmed must satisfy the following conditions. (i) The volume cap acities of MV and RV match. (ii) The specified R V is not set as RV for another pair[...]

Chapter 3 Replication Management 49 RV unmounted by the ReplicationControl function from a business server or back up server of Windows may be set in the Not Ready state. In this case, even if the synchronous state of the pair is “separated”, the RV mode is k ept in the Not Ready st ate. Make sure to change the RV set in the Not Ready state to [...]

Chapter 3 Replication Management 50 3 3 3 . . . 3 3 3 . . . 2 2 2 R R R e e e p p p l l l i i i c c c a a a t t t e e e When you perform Replicate for volumes with th e pair setting, co py from MV to RV starts. [Operation Procedure] Do one of the following to display the Replicate screen. • Select a volume in the Replication Information screen, c[...]

Chapter 3 Replication Management 51 For the “Unexecutable” vo lumes, do the following by referring to the Unexecutable Inform ation. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Replicated Execute it for a volume in the Separate state. Restored Execute it for a volum e in the Separa te state. Bei[...]

Chapter 3 Replication Management 52 (iv) C opy Mode You can specify the cop y control state in Repl icate Execution and the Synchronous state at the same time as Replica te. The following copy modes can be specified. Radio Button Description Synchronous Changes the copy control state to the foreground copy (Synchronous) mode. Semi-synchronous Chang[...]

Chapter 3 Replication Management 53 (vi) The activity state of the pair of the specified MV and the pair ed upper MV is not in the Restore state. (vii) The activity s tate of the pair of the specified RV and the paired lo wer RV is not in the Restore state. (viii) The disk arra y where the specif ied MV and RV are stored is not Fr eeze state. (ix) [...]

Chapter 3 Replication Management 54 3 3 3 . . . 3 3 3 . . . 3 3 3 S S S e e e p p p a a a r r r a a a t t t e e e If Separate is performed for paired volumes, MV is separated from RV and RV is made available. RV cannot be reused until Separate is completed. However, it can be used for Sep arate(immediate). [Operation Procedure] Do one of the follow[...]

Chapter 3 Replication Management 55 (i) Selected Volum e List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by re[...]

Chapter 3 Replication Management 56 (iii) RV Use Start Time Determine when to m ake the RV availabl e. Radio Button Description Separate End After Separate execution , the RV becomes available when th e difference between the MV and RV contents has be en reflected into the RV (Separate(completion)) . Separate Start After Separate execution , the RV[...]

Chapter 3 Replication Management 57 Figure 3-18 illustrates the ex ecution conditions of Separate. ( Each of (i) to (viii) i n the figure corresponds to the respective number above.) Figure 3-18 Execution Conditions of Separate Target Pair MV RV (i) Replication T arget Disk (ii) Pair Setting (iii) Not in Restore execution (iv) Not in the Freeze sta[...]

Chapter 3 Replication Management 58 3 3 3 . . . 3 3 3 . . . 4 4 4 R R R e e e s s s t t t o o o r r r e e e When you perform Restore for volumes with the pair se tting, copy from RV to MV starts. [Operation Procedure] Do one of the following to display the Restore screen. • Select a volume in the Replication Information screen, click [Operation] [...]

Chapter 3 Replication Management 59 (i) Selected Volum e List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by re[...]

Chapter 3 Replication Management 60 (iii) Active Mode Specify a Restore oper ation mode. Radio Button Description RV Protection Performs restoration without r eflecting the upd ated data of the M V into the RV. When the restoration is completed, Separa te is automaticall y executed. * To use this function for paired volumes located in the same disk[...]

Chapter 3 Replication Management 61 (vi) RV Status Specifies the acce ss restrictions from the host until Restore is complete. Radio Button Description Not Ready Operations for the volume cann ot be performed from the host. Read Only For the volume, only read can b e performed from the host. * Care should be taken to specify Read Only. Refer to 2.6[...]

Chapter 3 Replication Management 62 Figure 3-21 illustrates the ex ecution conditions of Restore. (Each of (i) to (xiii) in the figure corresponds to the respective number above.) Figure 3-21 Execution Conditions of Restore Target Pair RV MV RV MV RV MV ( i) Replication Target Disk (ii) Pair Setting (iii) Separated (iv) Semi-synchronous not allowed[...]

Chapter 3 Replication Management 63 3 3 3 . . . 3 3 3 . . . 5 5 5 S S S u u u s s s p p p e e e n n n d d d / / / R R R e e e s s s u u u m m m e e e C C C o o o p p p y y y You can suspend and resume copy operati on in the Replicate or Restore state. [Operation Procedure] Suspend Copy The Foreground Copy or Background Cop y state is changed to the[...]

Chapter 3 Replication Management 64 (i) Selected Volume List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by ref[...]

Chapter 3 Replication Management 65 Figure 3-23 shows an ex ample of the Resume Copy screen . Figure 3-23 Example of R esume Copy Screen From the list, select a pair for which you want to perform the oper ation, and then click the [Execute] button. You can select m ultiple executable pairs and execute them in a batch. Unexecutable pairs cannot b e [...]

Chapter 3 Replication Management 66 Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Foreground Copy State Execute it for a volume in the Suspend state. Separate State Execute it for a volume in the Suspend state. Freeze Defreeze the Data Replication function and exe cute it again . MV Monitoring Suspend[...]

Chapter 3 Replication Management 67 [Execution Conditions] To perform operations of suspending/resuming co py, the following conditions must be satisfied. (i) The target MV is recognized by Replicatio n Man agement as the Replication target disk. (ii) The target MV and RV are paired. (iii) The activity state of the targ et pair is Replicate or Rest[...]

Chapter 3 Replication Management 68 3 3 3 . . . 3 3 3 . . . 6 6 6 C C C h h h a a a n n n g g g e e e t t t o o o B B B a a a c c c k k k g g g r r r o o o u u u n n n d d d C C C o o o p p p y y y The copy control state is ch anged from the Replicat e or Restore state to the Background Copy state. [Operation Procedure] Do one of the following to d[...]

Chapter 3 Replication Management 69 Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Separate State Execute it for a volume in the Replicate state or Restore state. Already Background Copy State Execute it for a volume in Foreground Copy. Freeze Defreeze the Data Rep lication function and execute it agai[...]

Chapter 3 Replication Management 70 Figure 3-28 illustrates the ex ecution conditions of changes to Back ground Copy. (Each of (i) to (vi) in the figure corresponds to the r e spective number above.) Figure 3-28 Execution Conditio ns of Change to Background Copy Target Pair MV RV (i) Replication T arget Disk (ii) Pair Setting (iii) Replicate or Res[...]

Chapter 3 Replication Management 71 3 3 3 . . . 3 3 3 . . . 7 7 7 R R R V V V M M M o o o d d d e e e C C C h h h a a a n n n g g g e e e You can change the RV access restriction . [Operation Procedure] Do one of the following to display the RV Mode Change screen. • Select a volume in the Replication Information screen, click [Operation] on the m[...]

Chapter 3 Replication Management 72 (i) Selected Volume List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by ref[...]

Chapter 3 Replication Management 73 When you click the [Execute] button, the followi ng message is displayed. Figure 3-30 Confirmation Screen When it is performed for a volume in Replicate, Restore, or Separate execution, the following warning message is displayed and the change of the RV mode of the volume is cancelled. Figure 3-31 Warning Screen [...]

Chapter 3 Replication Management 74 3 3 3 . . . 3 3 3 . . . 8 8 8 F F F o o o r r r c c c e e e d d d S S S e e e p p p a a a r r r a a a t t t e e e When a failure occurs in the c onnection between disk arrays a nd the normal Separate cannot be performed on MV and RV, you can use Forced Sepa rate to instruct Separate to MV and RV individually. For[...]

Chapter 3 Replication Management 75 (i) Selected Volume List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by ref[...]

Chapter 3 Replication Management 76 Figure 3-34 is displayed when MV is not under the iSM. Figure 3-35 is displayed when RV is no t under the iSM. After execution, perform Forced Separate for MV or RV not separated . Figure 3-34 Warning Screen fo r MV without under iSM Figure 3-35 Warning Screen fo r RV without under iSM When you click the [Yes] bu[...]

Chapter 3 Replication Management 77 [Execution Conditions] To perform Forced Separate, the following conditions must be satisfied. (i) The target volume is recognized by Replica tion Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly separated. (iii) The disk array where the specif ied MV a n[...]

Chapter 3 Replication Management 78 3 3 3 . . . 3 3 3 . . . 9 9 9 F F F o o o r r r c c c e e e d d d U U U n n n p p p a a a i i i r r r When a failure o ccurs in the disk array of MV or RV, monitoring is suspended and the normal Cancel Pair may not be performed. In su ch a case, you can use Forced Unpair to unpair the pairs for M V and RV separat[...]

Chapter 3 Replication Management 79 (i) Selected Volume List Displays the list of the pair (MV/ RV) information selected in the Replication Inform ation screen. Volumes whose Execution Result is “Unexecutabl e” canno t be selected because th ey do not satisfy the execution conditions. For the “Unexecutable” vo lumes, do the following by ref[...]

Chapter 3 Replication Management 80 If Forced Unpair is performed fo r either MV or RV, the replic ation operations will not function properly because inconsistency occu rs in the reco gnized states of MV and RV. In this case , perform Forced Unpair for MV or RV for which Unpair is not performed. Figure 3-39 is displayed when MV is not under the iS[...]

Chapter 3 Replication Management 81 [Execution Conditions] To perform Forced Unpair, the following conditions must be satisfied. (i) The target volume is recognized by Replica tion Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly unpaired. (iii) The target pair is in the Separated or Forc e[...]

Chapter 3 Replication Management 82 3 3 3 . . . 3 3 3 . . . 1 1 1 0 0 0 F F F r r r e e e e e e z z z e e e / / / D D D e e e f f f r r r e e e e e e z z z e e e You can freeze or defre eze the Data Repl ication function of the disk array. [Operation Procedure] Do one of the following to display the Freeze/Defr eeze screen. • Select the disk arra[...]

Chapter 3 Replication Management 83 [Execution Conditions] To perform Freeze/Defree ze, the following conditions must be satisfied. (i) The target disk array is recognized b y Replication Managem ent. (ii) The specified disk array is monitored. When you perform F reeze, no replication operations can b e performed in the disk arra y. Refer to 2.8 ?[...]

Chapter 3 Replication Management 84 (i) Background Copy Level Specifies the priority of copy operation when Background Copy is selected in Replicate and Restore. A higher priority results in faster copying for refl ecting difference. (For more information, refer to 2.4 “Copy Control State”.) • Return Default Value Restores the default value o[...]

Chapter 3 Replication Management 85 3 3 3 . . . 3 3 3 . . . 1 1 1 2 2 2 C C C o o o n n n n n n e e e c c c t t t i i i o o o n n n S S S c c c r r r e e e e e e n n n The connection state of th e volume is displayed. [Operation Procedure] Do one of the following to display the Volume C onnection screen. y Select a volume in the Replication Informa[...]

Chapter 3 Replication Management 86 (i) Disk Array Name Displays the name of the disk array where the volume exists. The disk arra y name of the selected volume is highlighted. (ii) Logical Disk Nu mber, Format, Logical Disk Nam e Displays them in the form of “(logical disk number) format :logical disk na me (or VAA)”. The logical disk number, [...]

Chapter 3 Replication Management 87 [Connection Display of Paired Volumes] Connections of volumes are displa yed as pip es as shown below. During copy operation, the color of th e original disk moves through the pipe. y For DynamicDataReplication Replicate is executed : Replicate is complete : Restore is executed : Restore is complete : Separate is[...]

Chapter 3 Replication Management 88 [Differential Quantity of Volume/Transfer Rate] Displays the amount of difference and transfer r ate during copy operation. The unit of the amount of difference is variable (e.g. KB, MB, GB), and th e unit of transfer rate is fixed (MB/S). Example of Display (Repli cate) Amount of Difference Transfer Rate When Re[...]

Chapter 3 Replication Management 89 In the pair connected by RemoteDataReplication, th e remote disk array is not managed by iSM or, in a monitoring stop, may be displayed like the above. In the pair connected by RemoteDataReplication, when Rem ote Volume canno t be recognized from the host computer which Local Volume has connected by havin g perfo[...]

Chapter 3 Replication Management 90 Example of Display 2: Separate during Replicate Replicate Execution Separate Execution Separate is complete . [Others] You can perform the rep lication ope rations by ri ght-clicking the volume in the Connection scre en. For how to operate, refer to the items in 3.3. Turns to the laye r color b ecause Se p arate [...]

Chapter 3 Replication Management 91 3 3 3 . . . 3 3 3 . . . 1 1 1 3 3 3 C C C S S S V V V O O O u u u t t t p p p u u u t t t o o o f f f I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n L L L i i i s s s t t t D D D i i i s s s p p p l l l a a a y y y The replication information, the disk array LINK Information, and the AT-group i[...]

Chapter 3 Replication Management 92 [CSV File Containing Information Display List] This section show s an example of the CSV file that is created by executing the CS V output of information display list. In this file, the i nformation displayed on the screen is written in the format in which e ach item is separated by commas. An example of the CSV [...]

Chapter 3 Replication Management 93 3 3 3 . . . 3 3 3 . . . 1 1 1 4 4 4 S S S a a a v v v e e e P P P a a a i i i r r r S S S e e e t t t t t t i i i n n n g g g I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n This function saves the pair setti ng information for the selected disk array to a file. On the menu bar, do the following[...]

Chapter 3 Replication Management 94 Table 3-3 Pair List Format Ru les Item Number S y ntax Description 1 Pair Name List Identifier of this file. A space between char acters is a half size. 2 MV DiskArray Name Name of the dis k array where the Master Volume (MV) belongs. The maximum number of characters is 32. 3 MV OSTy pe OS type of MV. 4 MV ExVolN[...]

Chapter 3 Replication Management 95 3 3 3 . . . 3 3 3 . . . 1 1 1 5 5 5 E E E n n n v v v i i i r r r o o o n n n m m m e e e n n n t t t S S S e e e t t t t t t i i i n n n g g g The interval to o btain disk array information is specified. I t is the interval to obtain cop y progress information in the screen d isplay. On the menu bar, do the foll[...]

Chapter 3 Replication Management 96 When you perform [Refresh], the following message is displayed . Figure 3-51 Warning Screen fo r Refresh 3 3 3 . . . 3 3 3 . . . 1 1 1 7 7 7 R R R e e e c c c o o o r r r d d d S S S c c c r r r e e e e e e n n n I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n The screen infor mation of Replicat[...]

Chapter 3 Replication Management 97 3 3 3 . . . 3 3 3 . . . 1 1 1 8 8 8 D D D i i i s s s p p p l l l a a a y y y D D D i i i s s s k k k A A A r r r r r r a a a y y y P P P r r r o o o p p p e e e r r r t t t i i i e e e s s s The setting states of the device are displ ayed. Do the following: • Select a disk ar ray in the configuration display a[...]

Chapter 3 Replication Management 98 (iii) Replication Status Indicates whether the Dat a Replication funct ion of the disk array is availab le. Display Description READY Indicates that it is operable. FREEZE Indicates that the Dat a Replication f unction is frozen due to a power down process of the di sk array or acceptance of a F reeze instruction[...]

Chapter 3 Replication Management 99 Figure 3-53 Example of Link Properties Screen The items indicate the following information (Refer to Figure 3-5 “Replication Link Information”). (i) Link Disk Array Name Indicates the iden tification name a ssigned to the linked disk array. (ii) Path Number Indicates the lin k path number of the selected link[...]

Chapter 3 Replication Management 100 (vii) Path State Display Description Normal Indicates th e normal status. Offline Indicates that th e li nk setting is unconfirmed during startup of the disk array. Freeze Indicates that th e Data Replication f unction in th e target disk array is frozen. Link Checking Indicates that the link status is being che[...]

Chapter 3 Replication Management 101 3 3 3 . . . 3 3 3 . . . 2 2 2 0 0 0 D D D i i i s s s p p p l l l a a a y y y C C C o o o p p p y y y F F F a a a u u u l l l t t t L L L i i i s s s t t t The copy fault li st displays the p airs where a copy fault occurred. When a copy fau lt occurs, do the following to recover from th e fault. * The pair regi[...]

Chapter 3 Replication Management 102 (i) Status Status Description Fault Forcefully separated in the disk array due to a copy faul t. Abnormal Suspend Forcefully suspended in the disk array due to a cop y fault. (ii) Replicate Performs Replicate for the selected pa ir. This operation can be performed fo r a volume in the Fault state. (iii) Restore [...]

Chapter 4 Functions of ReplicationControl 103 Chapter 4 Functions of ReplicationContr ol This chapter describes how to operate functions of the ReplicationControl th at runs on the business server. The ReplicationControl functions include the creation and di splay of the volume list, r e plication operations, pair operations, and disk operations th[...]

Chapter 4 Functions of ReplicationControl 104 4 4 4 . . . 1 1 1 C C C o o o m m m m m m a a a n n n d d d L L L i i i s s s t t t Table 4-1 shows the commands of the Replication Control. For details of each comm a nd, refer to the “Data Replication Command Reference ”. Table 4-1 The List of ReplicationControl Commands Target System Command Name[...]

Chapter 4 Functions of ReplicationControl 105 4 4 4 . . . 2 2 2 O O O p p p e e e r r r a a a t t t i i i o o o n n n T T T y y y p p p e e e s s s To use ReplicationControl, the follo wing op erations can be selected. y Direct operation for a disk array This operation performs via FC directly a volume (M V or RV) con nected to the server and recog[...]

Chapter 4 Functions of ReplicationControl 106 Table 4-2 Operation Form Command Name Operation Direct Operation of Disk Array Operation Linked with iSM iSMvollist Volume List Creation/Display { − iSMrc_replicate Replicate { *1 { iSMrc_separate Separate { *1 { iSMrc_restore Restore { *1 { iSMrc_change Change Copy Control State { *1 { iSMrc_wait Wai[...]

Chapter 4 Functions of ReplicationControl 107 AccessCo ntrol Business Server Backup Server Replicati onControl Repli cationControl V olume L ist V olume L ist MV MV RV RV FC Connectio n FC Connectio n Figure 4-1 Direct Operation to MV or RV Volumes y A volume (control volume) is prepared to issue an I/O to a disk array, and operatio n is performed [...]

Chapter 4 Functions of ReplicationControl 108 Control V olume Business Server Backup Server ReplicationC ontrol ReplicationCont rol Vo l u m e L i s t Vo l u m e L i s t FC Connection FC Connection AccessCo ntrol MV MV RV RV Figure 4-2 Operation Using a Control Volume In the ReplicationControl environm ent setting, you need to set DIRECT (issue an [...]

Chapter 4 Functions of ReplicationControl 109 4 4 4 . . . 2 2 2 . . . 2 2 2 O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s L L L i i i n n n k k k e e e d d d w w w i i i t t t h h h i i i S S S M M M Operating ReplicationControl together with the re plication m anagement function of the iSM enables you to operate and maintain the data[...]

Chapter 4 Functions of ReplicationControl 110 [Notes on Operation] For operations linked with the iS M, pay attention to the following. y In the operations linked with the iSM, replicat ion is operated in the asynchronous state with operations. To perform replic ation operation linked with oper a tions, be sure to in stall ReplicationControl on ea [...]

Chapter 4 Functions of ReplicationControl 111 4 4 4 . . . 3 3 3 V V V o o o l l l u u u m m m e e e T T T y y y p p p e e e s s s Types of volumes that are specified as operation ta rgets for da ta replication commands are as follows: Table 4-3 shows the list of volume types. Table 4-3 List of Volume Types Target System Type Description Identifier [...]

Chapter 4 Functions of ReplicationControl 112 4 4 4 . . . 4 4 4 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n O O O p p p e e e r r r a a a t t t i i i o o o n n n F F F i i i l l l e e e To perform the batch sett ing of multiple pairs by executing rep lication and pair operation comm ands, or to execute multiple commands for a [...]

Chapter 4 Functions of ReplicationControl 113 4 4 4 . . . 5 5 5 V V V o o o l l l u u u m m m e e e L L L i i i s s s t t t C C C r r r e e e a a a t t t i i i o o o n n n / / / D D D i i i s s s p p p l l l a a a y y y The function to create and display the volume list associates logical d isk info rmation (disk array side) with system dependent i[...]

Chapter 4 Functions of ReplicationControl 114 The iSMvollist command corresponds to th e system info rm ation on the logical dis k of the disk array that can be recog nized from a business server and saves necessar y volume information in the volume list. Only the volumes that have already been register ed in the volume list can be specified when d[...]

Chapter 4 Functions of ReplicationControl 115 -ad option: Displays information only associated with a specified drive name or a p ath name of the NTFS folder. -ap option: Displays information only associated with specified logical disk n umbers. -av option: Displays information only associated with specifie d mount poin t volume names. -ah option: [...]

Chapter 4 Functions of ReplicationControl 116 (iii) When the -a opti on is specified: Correspondence information about logica l disks as shown below is listed. LDN LD Name VAA OS T ype H B T L U N D i s k N o . D i s k A r r a y Volume Name Path ldn ld_name vaa type hbt lun disk_num disk_array_ name volume_name path Description ldn: Logical disk nu[...]

Chapter 4 Functions of ReplicationControl 117 (v) When the -p option is specified : Property information of th e volume list as shown below is listed. --- Property of Volume List File --- V e r s i o n v e r s i o n Created YYYY/MM/DD hh:mm:ss Owner Host Name host_nam e D i s k A r r a y d i s k _ a r r a y _ n u m b e r V o l u m e I n f o r m a t[...]

Chapter 4 Functions of ReplicationControl 118 D i s k A r r a y d i s k _ a r r a y _ n u m b e r Volume Information volume _number Description X.X.XXX: Version information on the executed iSMvollist command YYYY/MM/DD HH:MM:SS: Execution date of the iSMvollist command disk_array_name: Disk array name number: Number of logical disk information (vol[...]

Chapter 4 Functions of ReplicationControl 119 4 4 4 . . . 5 5 5 . . . 2 2 2 C C C o o o m m m m m m a a a n n n d d d O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s ( ( ( U U U N N N I I I X X X ) ) ) On the UNIX system, by using t he volume list creatio n and display function by means of the iSMvollist command, it is possible to obtai[...]

Chapter 4 Functions of ReplicationControl 120 special file. -vl option: Displays information only associat ed with specifie d disk arrays sorted by using logical disk number as the key. If a specific logical d isk number is specified, the s ystem displays information only as sociated with the specif ied logical disk number. -ve option: Displays inf[...]

Chapter 4 Functions of ReplicationControl 121 Description ldn: Logical disk number ld_name: Logical disk name vaa: VAA (Volume Absolute Addres s) type: OS ty pe special_file_na me: Special fi le name disk_array_name: Disk array name path: W hether to use a s pecial file Usually this field is bl ank and nothing appears in this field , however, when [...]

Chapter 4 Functions of ReplicationControl 122 (v) When the -p option is specified : Property information of th e volume list as shown below is displayed. --- Property of Volume List File --- V e r s i o n v e r s i o n Created YYYY/MM/DD hh:mm:ss O w n e r H o s t N a m e h o s t _ n a m e D i s k A r r a y d i s k _ a r r a y _ n u m b e r Volume [...]

Chapter 4 Functions of ReplicationControl 123 Description X.X.XXX: Version information of the executed iSMvollist command YYYY/MM/DD HH:MM:SS: Execution date of the iSMvollist command disk_array_name: Disk array name number: Number of logical disk inform ati on items (special file) for each disk array registered in the volume list ldn: Logical disk[...]

Chapter 4 Functions of ReplicationControl 124 4 4 4 . . . 5 5 5 . . . 3 3 3 G G G U U U I I I O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s ( ( ( W W W i i i n n n d d d o o o w w w s s s ) ) ) On the Windows system, the volum e list creation and display function can b e used via the GUI. The GUI functions include volume list di splay[...]

Chapter 4 Functions of ReplicationControl 125 (iii) Toolbar buttons Toolbar Button Description [Create/Update Volume List] Clicking this button has the same effect as selecting [Create/Update Volum e List] from the menu. [Define Control Volume] Clicking this button has the same effect as selecting [Define Control Volum e] from the menu. [CSV Output[...]

Chapter 4 Functions of ReplicationControl 126 (xiv) Disk Array Displays disk array nam es in the Volume List file. (xv) Classification Displays the type (volume attribute) of volumes regarding data replication and snapshot by obtaining from a disk array. The information items (vi) to (xiv) above are d isp layed by obtaining from the volume list, ho[...]

Chapter 4 Functions of ReplicationControl 127 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 1 1 1 S S S t t t a a a r r r t t t i i i n n n g g g / / / T T T e e e r r r m m m i i i n n n a a a t t t i i i n n n g g g V V V o o o l l l u u u m m m e e e L L L i i i s s s t t t D D D i i i s s s p p p l l l a a a y y y This section describes the procedures fo[...]

Chapter 4 Functions of ReplicationControl 128 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 2 2 2 S S S e e e l l l e e e c c c t t t i i i n n n g g g D D D i i i s s s k k k A A A r r r r r r a a a y y y N N N a a a m m m e e e Click the pull-down button of dis k array Selection Combo box on the screen of Volume List Display , and select the t arget disk a[...]

Chapter 4 Functions of ReplicationControl 129 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 3 3 3 C C C r r r e e e a a a t t t e e e / / / U U U p p p d d d a a a t t t e e e t t t h h h e e e V V V o o o l l l u u u m m m e e e L L L i i i s s s t t t To update the Volume List, select [File] and then select [Create/Update Vo lume List] on the Volume List D[...]

Chapter 4 Functions of ReplicationControl 130 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 4 4 4 C C C S S S V V V O O O u u u t t t p p p u u u t t t o o o f f f I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n L L L i i i s s s t t t The information displa yed on the Volume List Display screen is output as a CS V file and then saved. [Ope[...]

Chapter 4 Functions of ReplicationControl 131 [File Example] The following example s hows the CSV file that is output as th e result of the CSV output of the information display list. Drive Letter/Path Name,Volume Name,Disk No.,Volume D efinition ,LUN,LDN,LD Name, Disk Array,Classification,Paired/Linked L ogical Disk Information List -,?Volume{c[...]

Chapter 4 Functions of ReplicationControl 132 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 5 5 5 D D D i i i s s s p p p l l l a a a y y y i i i n n n g g g P P P r r r o o o p p p e e e r r r t t t y y y I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n o o o f f f V V V o o o l l l u u u m m m e e e L L L i i i s s s t t t To check propert[...]

Chapter 4 Functions of ReplicationControl 133 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 6 6 6 V V V i i i e e e w w w / / / H H H i i i d d d e e e T T T o o o o o o l l l b b b a a a r r r To selec t whether t o view or hi de the tool bar, specify [View] → [Toolbar] on the Volume List Display screen. View Figure 4-14 Viewing Toolbar Hide Figure 4-15 H[...]

Chapter 4 Functions of ReplicationControl 134 4 4 4 . . . 5 5 5 . . . 3 3 3 . . . 8 8 8 U U U p p p d d d a a a t t t i i i n n n g g g D D D i i i s s s p p p l l l a a a y y y I I I n n n f f f o o o r r r m m m a a a t t t i i i o o o n n n To update the information of the Volume List file , select [View] and then select [Update Display Informat[...]

Chapter 4 Functions of ReplicationControl 135 Display items on the Defin e Control Volume screen ar e described below. (i) Selected Volume List Lists already-r egistered control volumes . : Displays a logical disk selected a s a control volume. (ii) Candidate Volume List Lists candidates of logical disks that can be r e gistered as a control volume[...]

Chapter 4 Functions of ReplicationControl 136 Figure 4-19 Register Control Volume Figure 4-20 Change Con trol Volume[...]

Chapter 4 Functions of ReplicationControl 137 When you try to change a control volume that has already been regis tered in [Candidate Volume List], the following conf irmation screen appears. To change the control volume to the logical disk selected from [Sele c ted Volume Lis t], click the [Yes] button. To return to the Define Con trol Volume sc r[...]

Chapter 4 Functions of ReplicationControl 138 (3) When you click the [OK] button on the Define Control Volume screen, the message for confirming whether to save the definition information appears. Figure 4-23 Save Confirmation Screen of Define Control Volume Screen When you click the [Yes] button for the conf irmati on, the definition information i[...]

Chapter 4 Functions of ReplicationControl 139 Figure 4-25 Cancel Confirmation Screen of Define Control Volume Screen (4) Update the volume list to reflect the updated definition information to the volume list. Select [File] → [Create/Update Volume List] fro m the Volume List Display s creen to create and update the volume list, and reflect the sa[...]

Chapter 4 Functions of ReplicationControl 140 4 4 4 . . . 6 6 6 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s Replication operation commands provide a function to operate volumes by using disk array’s Data Replication function as well as a function to ob tain and disp[...]

Chapter 4 Functions of ReplicationControl 141 (3) Specifying the Copy Control state (-cpmode) You can specify the Cop y Control state during R eplicate execution or in the S ynchronous state. The following can be specified. y Sy nchronous Copy (-cpmode sy nc) Changes the Copy Control state to the Synchronous Copy mode. y Se mi-synchronous Copy (-cp[...]

Chapter 4 Functions of ReplicationControl 142 [Displayed Information] The iSMrc_replicat e command displa ys messages when Replicat e starts, during execution, and whe n Replicate ends. On the Windows system [Start message] Replicate Star t YYYY/MM/DD hh:mm:ss MV:disk_number ld_name type volume_name path RV:disk_number ld_name type volume_name path[...]

Chapter 4 Functions of ReplicationControl 143 On the UNIX system [Start message] Replicate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Replicating..... [End message] Replicate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Descr[...]

Chapter 4 Functions of ReplicationControl 144 (ix) The Activity State of the pair of the specified MV and the paired upper MV is not in the Restore state. (x) The Activity State of the pa ir of the specified RV and th e paired lower RV is no t in the Restore state. (xi) The Semi-synchronous Copy mode cannot be spec ified for pair ed volumes set in [...]

Chapter 4 Functions of ReplicationControl 145 Figure 4-26 Execution Conditions of Replicate Target Pair MV RV ( vii ) Not in the Restore State RV MV Target Pair RV MV RV MV ( ix ) Not in the Restore State ( x ) Not in the Restore State (i) Pair setting (ii) MV or RV has been registered in the volume list. (iii) The volume list is not being created [...]

Chapter 4 Functions of ReplicationControl 146 4 4 4 . . . 6 6 6 . . . 2 2 2 S S S e e e p p p a a a r r r a a a t t t e e e C C C o o o m m m m m m a a a n n n d d d For Separate, the iSMrc_se parate command is used. The iSMrc_separate command separates RV from MV and makes RV available from the system. MV and RV must be set as a pair. [Main Option[...]

Chapter 4 Functions of ReplicationControl 147 y No Wait (-nowait) Performs only a Separat e start instruction and terminates the command. You can check the termination of the command b y the iS Mrc_query or iSMrc_wait command. (4) Forced Separate (-force) If a fault occurs in the connectio n between di sk arrays and the norma l Separate cannot be p[...]

Chapter 4 Functions of ReplicationControl 148 [Displayed Information] The iSMrc_separate command display s messages when Separate starts, duri ng execution, and when Separate ends. On the Windows system [Start message] Separate Start YYYY/MM/DD hh:mm:ss MV:disk_number ld_name type volume_name path RV:disk_number ld_name type volume_name path [Execu[...]

Chapter 4 Functions of ReplicationControl 149 On the UNIX system [Start message] Separate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Separating... [End message] Separate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Descriptio[...]

Chapter 4 Functions of ReplicationControl 150 (ix) When an LVM volume group or a VxVM disk gr oup is specified, the target volum e group or disk group must be active (UNIX only). (x) When specifying the combination of an LVM vo lume group or a VxVM disk group with a special file name (logical disk name), you must specify the same number of logical [...]

Chapter 4 Functions of ReplicationControl 151 4 4 4 . . . 6 6 6 . . . 3 3 3 R R R e e e s s s t t t o o o r r r e e e C C C o o o m m m m m m a a a n n n d d d For Restore, the iSMrc_restore com mand is used. By execut ing the iSMrc_rest ore command, copy from RV to the paired MV starts. Before Restore is performed, MV and RV to b e specifi ed must[...]

Chapter 4 Functions of ReplicationControl 152 (3) Specifying the Copy Control state (-cpmode) You can specify the Cop y Control state in Restore Execution and the Synchronous state. y Synchronous Copy (-cpmode sync) Changes the Copy Control state to th e Synchronous Copy mode. y Semi-synchronous Copy (-cpmode semi) Changes the Copy Control state to[...]

Chapter 4 Functions of ReplicationControl 153 y RV protection speci fied (-mode protect) Performs Restore without reflecting the updated data of the MV into th e RV. When Restore is completed and the Synchronous State is placed, Se parate is automatically executed and then the state changes to Separated State. y According to the default s e tting ([...]

Chapter 4 Functions of ReplicationControl 154 Description The execution m essage and the end message appear only when -w ait has been spec ified to wait for the Synchronous State (rst/sync). If you do not want th e execution message to appear, change the R PL_WAITMSG setting in the replication operation opt ion setting file. For information abou t [...]

Chapter 4 Functions of ReplicationControl 155 [Execution Conditions] To perform Restore, the following conditions must be satisfied. (i) The target MV and RV are paired. (ii) The target MV o r RV has been registered in the vo lume list. (iii) The volume list i s not being created or updated. (iv) Both MV and RV are unmounted from the system. (v) Th[...]

Chapter 4 Functions of ReplicationControl 156 Figure 4-28 illustrates the ex ecution conditions of Restore. Figure 4-28 Execution Conditions of Restore Target Pair RV MV RV MV RV MV (x) Separated (ix) Separated Target Pair RV MV RV (viii) Separated (i) Pair setting (ii) MV or RV has been registered in the volume list. (iii) The volume list is not b[...]

Chapter 4 Functions of ReplicationControl 157 4 4 4 . . . 6 6 6 . . . 4 4 4 C C C o o o p p p y y y C C C o o o n n n t t t r r r o o o l l l S S S t t t a a a t t t e e e C C C h h h a a a n n n g g g e e e C C C o o o m m m m m m a a a n n n d d d For changing the Copy Control state, th e iSMrc_change command is used. You can use option s pecific[...]

Chapter 4 Functions of ReplicationControl 158 Table 4-5 Relations of Copy Control State Change Option State before Change sync (synchro- nization) semi (semi- synchronization) bg (background) suspend (suspend) resume (resume) sync (synchronization) × × { { ∆ semi (semi-synchronization) × × { { ∆ bg (background) { { ∆ { { suspend (suspend)[...]

Chapter 4 Functions of ReplicationControl 159 On the UNIX system [Start message] Change Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [End message] Change Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description YYYY/MM/DD hh:mm:ss: Start/End time [...]

Chapter 4 Functions of ReplicationControl 160 Figure 4-29 illustrates the ex ecution conditions of ope rations regarding th e Copy Control state. Figure 4-29 Execution Conditio ns of Copy Control State Operation Target Pair MV RV (i) Pair setting (ii) MV or RV has been registered in the volume list. (iii) The volume list is not being created or u p[...]

Chapter 4 Functions of ReplicationControl 161 4 4 4 . . . 6 6 6 . . . 5 5 5 W W W a a a i i i t t t C C C o o o m m m m m m a a a n n n d d d Use the iSMrc_wait command to wait for S y nchronous State (rpl/s y nc), Synchronous State (rst/sync), or Separated State. A pair of MV and RV m ust be specified as the ta rget volumes beforehand. The MV and [...]

Chapter 4 Functions of ReplicationControl 162 replication operation opt ion setting file. On the UNIX system, the def ault value can be specified by using the RPL_WATCHDEV environment variable. For details of each setting, re fer to the “Data Replicatio n Command Reference”. (4) Paired-volume state monitoring time limit (-lim it) You can specif[...]

Chapter 4 Functions of ReplicationControl 163 activity_state: Activity State of the paired volumes for which the wai t command is completed Replicate: Synchronous State (rpl/sync) Restore: S y nchronous State (rst/sync) Separate: Separa ted (i ncluding the Separ ated state accompanied by completion of Restore(protect)) YYYY/MM/DD hh:mm:ss: Start/En[...]

Chapter 4 Functions of ReplicationControl 164 [Execution Conditions] To execute the wait command, the following conditions must be satisfied: (i) The target MV and RV are paired. (ii) The target MV o r RV has been registered in the vo lume list. (iii) The volume list i s not being created or updated. (iv) The disk array where the specified MV and R[...]

Chapter 4 Functions of ReplicationControl 165 4 4 4 . . . 6 6 6 . . . 6 6 6 R R R e e e p p p l l l i i i c c c a a a t t t i i i o o o n n n S S S t t t a a a t t t e e e D D D i i i s s s p p p l l l a a a y y y C C C o o o m m m m m m a a a n n n d d d To display the replication state, the iSMrc_query command is used. As the target volume, MV an[...]

Chapter 4 Functions of ReplicationControl 166 Synchronous State sync Copy Control State copy <state> Start Time YYYY/MM/DD hh:mm:ss <state> End Time YYYY/MM/DD hh:mm:ss Separate Diff separ ate_diffsize Copy Diff copy_diffsize RV Access rvacc Previous Active prev_state Description disk_number: Physical disk number ld_name: Logical disk n[...]

Chapter 4 Functions of ReplicationControl 167 Previous Active prev_state Description special_file_na me: Special fi le name ld_name: Logical disk name type: OS type activity: Activit y State sync: Paired operation state copy: Copy Control St ate <state> Sta rt Time: Oper ation star t time (<state> varie s) <state> End Tim e: Opera[...]

Chapter 4 Functions of ReplicationControl 168 Figure 4-31 Displaying Replication State Target Pair R V M V (i) Pair setting (ii) MV or RV has been registered in the volume list. (iii) The volume list is not being created or u pdated (iv) The disk is not a dynamic disk or GPT-formatted partition disk.[...]

Chapter 4 Functions of ReplicationControl 169 4 4 4 . . . 6 6 6 . . . 7 7 7 S S S p p p e e e c c c i i i f f f i i i c c c V V V o o o l l l u u u m m m e e e N N N a a a m m m e e e D D D i i i s s s p p p l l l a a a y y y C C C o o o m m m m m m a a a n n n d d d To carry out a specific vo lume name displa y, the iSM rc_sense command is used. T[...]

Chapter 4 Functions of ReplicationControl 170 attribute: Logical disk attribute for th e data replication and snapshot functions Displays only when th e -attr option is specified. link_status: Link state of the link-volume Displays only when th e -attr option is specified. W hen the target volume is not a link-volume, “-” (hyphen) appears. link[...]

Chapter 4 Functions of ReplicationControl 171 Figure 4-32 shows execution conditions for displaying a specific volume name. Figure 4-32 Displaying Specific Volume Name Target (i) T he target volume or the volume paired with the target volume has been registered in the vo lume list. (ii) The volume list is not being created or u pdated (iii) The dis[...]

Chapter 4 Functions of ReplicationControl 172 4 4 4 . . . 7 7 7 P P P a a a i i i r r r S S S e e e t t t t t t i i i n n n g g g a a a n n n d d d U U U n n n p p p a a a i i i r r r O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s Pair operation commands make functions available for listing lo gical disks, pair setting and unpairing. P[...]

Chapter 4 Functions of ReplicationControl 173 [Displayed Information] (1) When the -a option or the -de op tion is specified: Logical disk information as sho wn below is listed. Receiving... ---------------------------------------------------------------------------------------------------- ----------- [Disk Array Name](Management) LDN OS T ype LD [...]

Chapter 4 Functions of ReplicationControl 174 Description Receiving... Message indicating that data is b eing received. During a joint operation with replication m anagement, this message is displayed until d ata has been rece i ved. Whil e data is being received, the “.” character is updated. disk_array_name Disk array name management Identifi[...]

Chapter 4 Functions of ReplicationControl 175 4 4 4 . . . 7 7 7 . . . 2 2 2 P P P a a a i i i r r r / / / U U U n n n p p p a a a i i i r r r C C C o o o m m m m m m a a a n n n d d d To execute pair setting o r unpair, the iSMrc_pair command is used. The iSMrc_pair command sets and unpairs specified pair ed MV and RV. If a failure occurred on the [...]

Chapter 4 Functions of ReplicationControl 176 (3) Forced Unpair (-force) If the regular un pairing becomes im possible due to a failure o ccurred in the connections between disk arrays and the like, it is possible to perfo rm Forced unpair for MV and RV individually by specifying the -force option. You can specify one of the following as a Forced U[...]

Chapter 4 Functions of ReplicationControl 177 (xi) The volume list is not being created or updated. (xii) Specifying a volume of a d y namic disk or a GPT-form at partition disk is not al lowed (Windows only). (xiii) The iSM dedicated special file is not being cr eated (HP-UX version UNIX only). The above execution conditions (ii), (xi), (xii), an [...]

Chapter 4 Functions of ReplicationControl 178 4 4 4 . . . 8 8 8 D D D i i i s s s k k k A A A r r r r r r a a a y y y O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s The disk array operation command provides the functio n of displaying inform ation on the r eplication function of a disk array. 4 4 4 . . . 8 8 8 . . . 1 1 1 C C C o o o m[...]

Chapter 4 Functions of ReplicationControl 179 [Displayed Information] (1) When the -dinfo option is specifi ed Information on the rep lication function of a disk array is displayed as shown below. Disk Array Name disk_array_name SAA saa Differential Map diff_map Replication Status replication_status Back Ground Copy Level bgcopy_level Max Number of[...]

Chapter 4 Functions of ReplicationControl 180 Description disk_array_name: Name of the disk array to link to link_number: Link number Number of a disk arra y to link to (link number), beginning with 0 path_number: Path number Connection number for each of d isk arrays to link to, beg inning with 0 path_state: Path status Indicates the con nection s[...]

Chapter 4 Functions of ReplicationControl 181 4 4 4 . . . 9 9 9 D D D i i i s s s k k k O O O p p p e e e r r r a a a t t t i i i o o o n n n s s s The disk operation function, which functions onl y on th e Windows system, enables disks to be controlled and operated so as to operate the da ta replication and snapshot functions on the Windows sys te[...]

Chapter 4 Functions of ReplicationControl 182 Description YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number: Phy sical disk number ld_name: Logical disk name type: OS type volume_name: Mount poi nt volume name path: Drive letter or path name mounted on the NTFS volume folder accessed by user s [Execution Conditions[...]

Chapter 4 Functions of ReplicationControl 183 4 4 4 . . . 9 9 9 . . . 2 2 2 V V V o o o l l l u u u m m m e e e M M M o o o u u u n n n t t t C C C o o o m m m m m m a a a n n n d d d To carry out a volume mount, th e iSMrc_mount command is used. The iSMrc_mount command associates volumes (partitions) and file systems. Mounting allows volumes to be[...]

Chapter 4 Functions of ReplicationControl 184 volume_name: Mount poi nt volume name path Drive letter or path name mounted on the NTFS volume folder accessed by user s iSM13220: Setting drive letter (drive :) (volume_name) has succeeded. Message output when a drive letter or an NTFS f older name is set [Execution Conditions] To perform Mount, the f[...]

Chapter 4 Functions of ReplicationControl 185 4 4 4 . . . 9 9 9 . . . 3 3 3 V V V o o o l l l u u u m m m e e e U U U n n n m m m o o o u u u n n n t t t C C C o o o m m m m m m a a a n n n d d d To unmount a volume, the iS Mrc_umount command is used. The iSMrc_umount command cancels the association of volumes (partitions) w ith file systems. Unmou[...]

Chapter 4 Functions of ReplicationControl 186 [End message] Umount Normal End YYYY/MM/DD hh:mm:ss disk_number ld_name type volume_name path Description iSM13221: Resetting drive letter (drive :) (volum e_name) has succeeded. Message output when a drive letter or an NTFS folder name is deleted automatically YYYY/MM/DD hh:mm:ss: Start/End time (Year [...]

Chapter 4 Functions of ReplicationControl 187 4 4 4 . . . 9 9 9 . . . 4 4 4 D D D i i i s s s k k k S S S i i i g g g n n n a a a t t t u u u r r r e e e O O O p p p e e e r r r a a a t t t i i i o o o n n n C C C o o o m m m m m m a a a n n n d d d For the disk signature operations, the iSMrc_signature command is used. A disk signature is system i[...]

Chapter 4 Functions of ReplicationControl 188 [Displayed Information] The following information is d isplayed in the si gnature informatio n list of the iSMrc_signature command. [Displayed information] D i s k M a p D i s k S a v e d L V L i n k Disk Array Nam e No. LDN Signature Signature Signature Attribute Status ---------------- - - ---- ---- -[...]

Chapter 4 Functions of ReplicationControl 189 4 4 4 . . . 9 9 9 . . . 5 5 5 D D D e e e v v v i i i c c c e e e s s s S S S c c c a a a n n n C C C o o o m m m m m m a a a n n n d d d To scan devices , the iSMrc_scan comm and is used. Executing the iSMr c_scan command scans devices and lets the system recogn ize available devices. When the system i[...]

190 Index A abnormal suspend ........................................................ 21 activity stat e .......................................................... 16, 32 B background copy ................................................... 17, 68 background copy level ......................................... 98, 179 background copy level change .[...]

191 I I/O issuing path ......................................................... 108 interval to obtain di sk array information ..................... 95 iSMrc_arrayinfo ........................................................ 106 iSMrc_change ............................................ 10 4, 106, 157 iSMrc_flush ...................................[...]

192 Restore State ................................................................ 15 resume co py ........................................................... 63, 64 RO ............................................................................... 20 rRV ................................................................................ 8 RV ........[...]