Dell H800 manuale d’uso

Dell PowerEdge RAID Controller Cards H700 and H800 Technical Guide Enterprise-class controllers designed for performance , reliability, a nd fault toleran ce.[...]

Dell DELL PERC H700 and H800 Technica l Guide 2 This documen t is for info rmationa l purposes only. Dell reserves the right to make changes without further notice to a ny produ cts herein. The cont ent provide d is as is and without express or implied warranties of any kind. Dell, PowerEdge , PowerVa ult, and OpenMana ge are tradema rks of Dell, I[...]

Dell DELL PERC H700 and H800 Technica l Guide 3 Table of Contents 1 Product Compa rison ........................................................................................... 5 1.1 Overview .................................................................................................. 5 1.2 PERC H700 Model O verview ........................[...]

Dell DELL PERC H700 and H800 Technica l Guide 4 5.3.5 RAID 10 (Striping over Mirrored Set s) ......................................................... 25 5.3.6 RAID 50 (Striping Across RAID 5) ............................................................... 26 5.3.7 RAID 60 (Striping Across RAID 6) ...................................................[...]

Dell DELL PERC H700 and H800 Technica l Guide 5 1 Product Compari son 1.1 Overview The PERC H700 (i nternal) and PERC H800 (extern al) RAID controllers ma rk t he next stage in the evolutio n o f the Dell ™ Power Edge™ RAID controlle r portf olio with t he introduction o f 6Gb/s SAS (S AS 2.0). PERC H700 and H8 00 will be suppo rted in PowerEdg[...]

Dell DELL PERC H700 and H800 Technica l Guide 6 1.2 PERC H700 Overview The PERC H700 interna l host-RAID produ ct offers three different mode ls to su pport 11 th Generation Dell PowerEdge servers:  The PERC H700 Integrated card with tw o x4 internal mi ni-SAS ports supp orts the PCIe 2.0 x8 host int erface. Cache options include standa rd 512 M[...]

Dell DELL PERC H700 and H800 Technica l Guide 7 Figure 2. PERC H700 Modular 1.3 PERC H800 Overview The PERC H800 externa l host-RAID produ ct is supp orted with 11 th Generatio n Dell PowerEdge servers for expanding st orage to the D ell ™ PowerVault ™ MD1200 and MD1220 6Gb/s SA S enclosures. The PERC H800 Adapt er with t wo x4 external mi ni-S[...]

Dell DELL PERC H700 and H800 Technica l Guide 8 Figure 3. PERC H800 Adapter[...]

Dell DELL PERC H700 and H800 Technica l Guide 9 2 New F eatures 2.1 Overview The PERC H700 and PE RC H800 o ffer the new Ca cheCade feat ure: • Produces cost-effe ctive perform ance scaling fo r databa se-type applications • Offloads Random Reads to D ell-qualified Enterpris e SSD configured as Ca cheCade SSD • Has a standa rd feature of 1 GB[...]

Dell DELL PERC H700 and H800 Technica l Guide 10 Other new features of the 6Gb /s SAS controlle rs will offer impro ved sign al integrit y and additional safeguards to enhance data prot ection wit h support for SED (Self-Encrypt ing Drive) techno logy. Table 2. 6Gb/s SAS ( SAS 2.0) Fea tures DAS-based Server Storage 6Gb/s Throughput  3Gb/s Compa[...]

Dell DELL PERC H700 and H800 Technica l Guide 11 3 Product Support 3.1 Dell PowerEdge Server Support The Dell PERC H700 and PERC H800 are supported wit h 11 th Generation Dell™ PowerEdge ™ servers . Refer to Table 1 for the 11 th Generatio n PowerEdge servers t hat suppo rt the PERC H700 and PE RC H800. For the latest Del l PERC support matrix [...]

Dell DELL PERC H700 and H800 Technica l Guide 12 Table 5. Operatin g System Su pport wit h PERC H700 and PERC H800 Supported Operating Sys tems Microsoft ® Windows Se rver ® 2003 Family Microsoft Windows Server 2008 Family Microsoft Windows Server 2008 R2 Red Hat ® Enterprise Li nux ® Version 4 and V ersion 5 RHEL 4.7 and later (32 and 64 bit) [...]

Dell DELL PERC H700 and H800 Technica l Guide 13 4 Product Overv i ew 4.1 PERC H700 and PERC H800 Overview Table 7. PERC H70 0 and PERC H800 Featur es Feature PERC H700 Integrated/Ad apter PERC H700 Modular PERC H800 Adapte r RAID Levels 0, 1, 5, 6, 10, 50, 60 0, 1, 5, 6, 10 0, 1, 5, 6, 10, 50, 60 Ports 2 x4 internal mini-SAS wide ports 1 x4 integr[...]

Dell DELL PERC H700 and H800 Technica l Guide 14 Feature PERC H700 Integrated/Ad apter PERC H700 Modular PERC H800 Adapte r Physical Disk Power Management Yes Yes Yes RAID Level Migration Yes Yes Yes On -line Capacity Expansion Yes Yes Yes Non-Volatile Cache Yes No Yes SMART Support Yes Yes Yes Redundant Path Support N/A N/A Yes Dedicated and Globa[...]

Dell DELL PERC H700 and H800 Technica l Guide 15 Feature PERC H700 Integrated/Ad apter PERC H700 Modular PERC H800 Adapte r Clustering Card and software stack enables Hig h Availability Clusters Not supported 4.2 CacheCade CacheCade provides cost-effective per formance s caling for databa se-type applicatio n profiles in a host-based RAID envi ronm[...]

Dell DELL PERC H700 and H800 Technica l Guide 16 Table 8. RAID L evel Migrati on Source RAID Level Target RAID Level # of Physical Drives (Beginning) # of Physical Drives (End) Capacity Expansion Possible Description RAID 0 RAID 1 1 2 No Converting non- redundant virt ual disk into a mirrored v irtual disk by adding one drive. RAID 0 RAID 5 1 or mo[...]

Dell DELL PERC H700 and H800 Technica l Guide 17  Physical disk rebuild using ho t spar es  Enclosure affinit y  Parity gene ration and checkin g (for RAID 5, 50 , 6, and 60 onl y)  Battery ba ckup of contro ller cache to prot ect dat a  Detectio n of batteries with lo w charge after boo t up 4.5.1 Non-Volatile Cach e Dell PERC contr[...]

Dell DELL PERC H700 and H800 Technica l Guide 18 being a ready ho t spare. This al lows hot sp ares to remain in specific enclo sure slots. Whi le the controller is reverti ng the hot spare, the virtual disk remain s optima l. The c ontroller aut omaticall y reverts a hot spare onl y if the fa iled drive is replaced wit h a new drive in the same sl[...]

Dell DELL PERC H700 and H800 Technica l Guide 19 4.7 Disk Roaming The PERC H700 and H80 0 cards support mo ving ph ysical disks from one cable conne ction or backplane slo t to anot her on the same controller . The controller aut omatically recognizes the relocated physi cal disks and logically places them in t he proper virtual d isks tha t are pa[...]

Dell DELL PERC H700 and H800 Technica l Guide 20 4.10 Virtual Disk Write Cache Policies The write cache poli cy o f a virtual disk det ermines how the controller ha ndles writ es to that virtual disk. Write-Back and W rite-Throug h are the two w rite cache poli cies and can be set on virtual disks individuall y. All RAID volum es will be pres ented[...]

Dell DELL PERC H700 and H800 Technica l Guide 21 5 RAID Overv ie w 5.1 About RAID RAID is a way of storing data on mul tiple independen t physical disk s for the purpose o f enhanced performance and/o r fault to lerance. The physica l disks combi ne to make up what is called a virtua l disk. This virtua l disk appears to the host system as a single[...]

Dell DELL PERC H700 and H800 Technica l Guide 22 For example, a four -drive virtua l disk may be co nfigured wit h 16 stripes (four st ripes of designa ted space per drive). Stripes A, B, C and D are located on cor respondin g hard drives 0, 1, 2, and 3. Str ipe E, however, appears on a segment of drive 0 in a different lo cation than st ripe A; st[...]

Dell DELL PERC H700 and H800 Technica l Guide 23 Figure 5. Example of RAID 1 (Mirrorin g) A dvantages of RA ID 1  High performance up to tw ice the read transa ction rate of sing le disks, a nd the same w rite transaction ra te as single disk s  100 percent redunda ncy o f data means no rebuild of dat a is necessary in case of disk failure, j[...]

Dell DELL PERC H700 and H800 Technica l Guide 24 Figure 6. Example of RAID 5 (Single Vi rtual Disk wi th 5 drives) A dvantages of RA ID 5  Most efficient use of drive capacit y of all the redunda nt RAID configurat ions  High read transa ction ra te  Medium- to -high write transactio n rate Disadvan tages of RA ID 5  Disk failure ha s a[...]

Dell DELL PERC H700 and H800 Technica l Guide 25 Figure 7. Example of RAID 6 (Single Vi rtual Disk wi th 5 drives) A dvantages of RA ID 6  Can survive the lo ss of t wo disks wit hout losing data  Data redund ancy, high rea d rates, and good pe rformance Disadvan tages of RA ID 6  Requires two set s of parit y data for each writ e operat i[...]

Dell DELL PERC H700 and H800 Technica l Guide 26 Figure 8. Example of RAID 10 (1 + 0) Advantages of RAI D 10  RAID 10 has the sam e redu ndancy as RAID le vel 1  High I/O rates are achieved by striping RAID 1 segment s  Allows creatio n of largest RAID g roup with up to 192 drives conne cted to PE RC H800 Disadvantage s of RAID 1 0  Mos[...]

Dell DELL PERC H700 and H800 Technica l Guide 27 Figure 9. Example of RAID 50 (5 + 0) Advantages of RAI D 50  Allows creatio n of largest RAID g roups, up to 25 6 drives (theo retical; larg e RAID volu mes are allowed for up t o 192 drives connected to PE RC H800 )  High read transa ction rat e  Higher degree of fault tole rance due to par[...]

Dell DELL PERC H700 and H800 Technica l Guide 28 Figure 10. Example of RAID 60 (6 + 0) Advantages of RAI D 60  Allows creatio n of largest RAID g roups, up to 25 6 drives (theo retical); lar ge RAID volum es are allowed for up t o 192 drives connected to PE RC H800  High degree of fault tolerance due to 2 pa rity cal culations being done for [...]

Dell DELL PERC H700 and H800 Technica l Guide 29 Appendix A. Additional R e sources Table 9. Resource Con tact Infor mation and Description s Type Of Information URL Description PERC Resources http://www.dell.com/ PERC Support matrix, white papers, and important li nks PERC Hardware Owner’s Manual http://support.dell .com/manuals Specifications, [...]