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Table 8. Physical disk actions
Action Description
Rebuild Regenerates all data to a replacement disk in a redundant virtual disk (RAID level
1, 5, 6, 10, 50, or 60) after a disk failure. A disk rebuild normally occurs without
interrupting normal operations on the affected virtual disk.
Replace Member Replaces the disk in the virtual disk with another disk that can be selected.
LED Blinking Indicates when physical disks are being used to create a virtual disk. You can
choose to start or stop the LED blinking.
Force Online Changes the state of the selected physical disk to online.
Force Offline Changes the state of the selected physical disk so that it is no longer part of a
virtual disk.
Make Global HS
Designates the selected physical disk as a global hot spare. A global hot spare is
part of a pool for all virtual disks controlled by the controller.
Remove HS Removes a dedicated hot spare from its disk group or a global hot spare from
the global pool of hot spares.
Rebuild
Select Rebuild to rebuild one or more failed physical disks. For information on performing a physical disk
rebuild, see Performing A Manual Rebuild Of An Individual Physical Disk.
Several of the controller configuration settings and the virtual disk settings affect the actual rate of
rebuild. The factors include the rebuild rate setting, virtual disk stripe size, virtual disk read policy, virtual
disk write policy, and the amount of workload placed on the storage subsystem. For information on
getting the best rebuild performance from your RAID controller, see the documentation at dell.com/
storagecontrollermanuals.
The listed rates in the following table were taken during single disk failure with no I/O. Rates vary
depending on type, speed and number of hard drives present in array; as well as which controller model
and enclosure configuration are being used.
Table 9. Estimated rebuild rates
RAID Level Number of Hard Drives 7.2 K rpm 12 Gbps SAS Hard
Drive
15 K rpm 6 Gbps SAS
Hard Drive
RAID 1 2 320 GB/hour 500 GB/hour
RAID 5 6 310 GB/hour 480 GB/hour
RAID 10 6 320 GB/hour 500 GB/hour
RAID 5 24 160 GB/hour 240 GB/hour
RAID 10 24 380 GB/hour 500 GB/hour
Controller management (Ctrl Mgmt)
The Controller Management screen (Ctrl Mgmt) displays the product name, package, firmware version,
BIOS version, boot block version, controller ID, security capability, and security key presence. Use the
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