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4 Contents
Initializing Virtual Disks . . . . . . . . . . . . . . . . . 25
Background Initialization
. . . . . . . . . . . . . . 25
Full Inititialization of Virtual Disks
. . . . . . . . . . 26
Fast Inititialization of Virtual Disks
. . . . . . . . . 26
Consistency Checks
. . . . . . . . . . . . . . . . . . . 26
Disk Roaming
. . . . . . . . . . . . . . . . . . . . . . . 27
Disk Migration
. . . . . . . . . . . . . . . . . . . . . . 27
Compatibility With Virtual Disks Created
on PERC 5 Controllers
. . . . . . . . . . . . . . . . 28
Compatibility With Virtual Disks Created
on SAS 6/iR Controllers
. . . . . . . . . . . . . . . 29
Migrating Virtual Disks from SAS 6/iR
to PERC 6 and CERC 6i
. . . . . . . . . . . . . . . 29
Battery Management
. . . . . . . . . . . . . . . . . . . 30
Battery Warranty Information
. . . . . . . . . . . 31
Battery Learn Cycle
. . . . . . . . . . . . . . . . . 31
Virtual Disk Write Cache Policies
. . . . . . . . . . . . 32
Write-Back and Write-Through
. . . . . . . . . . . 32
Conditions Under Which
Write-Back is Employed
. . . . . . . . . . . . . . 33
Conditions Under Which
Write-Through is Employed
. . . . . . . . . . . . . 33
Conditions Under Which Forced
Write-Back With No Battery is Employed
. . . . . 33
Virtual Disk Read Policies
. . . . . . . . . . . . . . . . 33
Reconfiguring Virtual Disks . . . . . . . . . . . . . . . 34
Fault Tolerance Features
. . . . . . . . . . . . . . . . . 36
Physical Disk Hot Swapping
. . . . . . . . . . . . 36
Failed Physical Disk Detection
. . . . . . . . . . . 37
Dell_PERC6.1_UG.book Page 4 Wednesday, April 15, 2009 4:18 PM