Users Guide

Contents
1 About the Shared PERC 8 card...................................................................................................................... 6
Congurations of the Shared PERC 8 card.................................................................................................................... 7
Specications of a Shared PERC 8 card.........................................................................................................................8
Operating temperature of a Shared PERC 8 card................................................................................................... 9
Supported operating systems...........................................................................................................................................9
Best practices for Shared PERC 8................................................................................................................................. 10
Documentation matrix......................................................................................................................................................10
2 Shared PERC 8 card features....................................................................................................................... 12
Physical disk power management...................................................................................................................................12
Consistency Checks......................................................................................................................................................... 12
Virtual disk initialization.................................................................................................................................................... 13
Background Initialization of virtual disks.................................................................................................................. 13
Full Initialization of virtual disks.................................................................................................................................13
Fast Initialization of virtual disks............................................................................................................................... 13
Physical disk roaming....................................................................................................................................................... 13
Using physical disk roaming.......................................................................................................................................14
FastPath.............................................................................................................................................................................14
Virtual disk migration........................................................................................................................................................ 14
Migrating virtual disks if the target system is turned o....................................................................................... 15
Migrating virtual disks if the target system is turned on....................................................................................... 15
Virtual disk cache policies................................................................................................................................................15
Virtual disk write cache policies................................................................................................................................15
Write-back ..................................................................................................................................................................16
Conditions under which write-back is employed.................................................................................................... 16
Conditions under which forced write-back with no battery is employed............................................................ 16
Write-through..............................................................................................................................................................16
Conditions under which write-through is employed...............................................................................................16
Virtual disk read cache policies................................................................................................................................. 16
Physical disk write cache policy...................................................................................................................................... 17
Fault tolerance...................................................................................................................................................................17
The SMART feature....................................................................................................................................................17
Auto replace member.................................................................................................................................................18
Patrol Read.................................................................................................................................................................. 18
Physical disk failure detection................................................................................................................................... 19
Physical disk hot swapping........................................................................................................................................19
Shared PERC 8 card cache preservation................................................................................................................ 19
Battery Transparent Learn Cycle............................................................................................................................. 20
The controller failover feature.................................................................................................................................. 20
Multipath support............................................................................................................................................................ 20
3 Deploying the Shared PERC 8 card.............................................................................................................. 21
Safety instructions............................................................................................................................................................21
Contents
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