Dell PowerEdge RAID Controller 5i - Manual (Page 23)

PERC 5 Features
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RAID Configuration Information
Table 2-2 lists the configuration features for the PERC 5 controllers.
Fault Tolerance Features
Table 2-3 lists the features that provide fault tolerance to prevent data loss in case of a failed physical disk.
Table 2-2. Features for RAID Configuration
Specification PERC 5/E Adapter PERC 5/i Adapter and 5/i Integrated
Number of virtual disks
supported Up to 64 virtual disks per controller Up to 64 virtual disks per controller
NOTE:
The number of physical disks on a
controller is limited by the backplane on which
the card is attached.
Online RAID level migration Yes Yes
Disk roaming Yes Yes
No reboot necessary after
capacity expansion Yes Yes
User-specified rebuild rate Yes Yes
Table 2-3. Fault Tolerance Features
Specification Feature
Support for SMART Yes
Support for Patrol Read Yes
Physical disk failure detection Automatic
Physical disk rebuild using hot spares Automatic
Parity generation and checking (RAID 5 only) Yes
Battery backup for controller cache to protect configuration data Yes
a
Hot-swap manual replacement of a physical disk unit without bringing the system down Yes
a
The PERC 5/i Adapter supports a battery backup unit (BBU) on selected systems only. For additional information,
see documentation that was shipped with the system.
Dell_PERC5_UG.book Page 21 Tuesday, February 13, 2007 6:02 PM