Dell UCC-60, UCP-60, UCP-61 manual - page 4

4Contents
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