Dell PowerEdge RAID Controller 5i - Manual (Page 6)

4
Contents
Battery Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Introduction to Write Cache Policy . . . . . . . . . . . . . . . . . . . . . 19
Write-Back versus Write-Through . . . . . . . . . . . . . . . . . . . . . 19
How Firmware Manages Cache . . . . . . . . . . . . . . . . . . . . . . 19
Conditions Under Which Write-Back is Employed . . . . . . . . . . . . . 20
Conditions Under Which Write-Through is Employed . . . . . . . . . . . 20
Conditions Under Which Forced Write-Back
With No Battery is Employed
. . . . . . . . . . . . . . . . . . . . . . . . 20
RAID Configuration Information . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fault Tolerance Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Physical Disk Hot Swapping . . . . . . . . . . . . . . . . . . . . . . . . 22
Patrol Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Patrol Read Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Patrol Read Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Behavior Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Blocked Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3 Hardware Installation and Configuration
. . . . . . . . . . . . .
25
Installing the PERC 5/E Adapter . . . . . . . . . . . . . . . . . . . . . . . . . 25
Installing the Transportable Battery Backup Unit (TBBU)
for PERC 5/E
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Installing the DIMM on a PERC 5/E Adapter . . . . . . . . . . . . . . . . . . . 28
Transferring a TBBU Between Controllers . . . . . . . . . . . . . . . . . . . 30
Removing the PERC 5/E Adapter . . . . . . . . . . . . . . . . . . . . . . 30
Removing the DIMM and Battery from a PERC 5/E Adapter . . . . . . . . . . . 31
Installing the PERC 5/i Adapter . . . . . . . . . . . . . . . . . . . . . . . 33
Removing the PERC 5/i Adapter . . . . . . . . . . . . . . . . . . . . . . . . . 35
Removing the DIMM from a PERC 5/i Card . . . . . . . . . . . . . . . . . . . 37
Disconnecting the BBU from a PERC 5/i Adapter or a PERC 5/i . . . . . . . . . 38
Dell_PERC5_UG.book Page 4 Tuesday, February 13, 2007 6:02 PM