Dell Precision 470 - Manual (Page 48)

RAID: Dell Precision Workstation 470 and 670 Computers User's Guide
file:///T|/htdocs/systems/ws670/EN/ug_en/raid.htm[3/20/2013 9:31:47 AM]
before deleting the boot array. For some operating systems, deleting a disk group and its associated logical drives
might change the drive-letter assignments of the remaining drives when you restart the computer.
NOTICE: If you delete a disk group, you delete all logical devices that are defined in that disk group. All data and
programs on the logical devices in the disk group are lost during this procedure.
To delete a disk group:
1. In the Physical devices view, click the array.
NOTICE: Before proceeding, ensure that you have backed up any data and programs that you want to save.
2. Right-click Delete disk group.
3. Click Yes.
Manually Rebuilding a Failed Drive
Use this action to rebuild a degraded logical device when a physical drive in the disk group is failed. Normally, the controller
rebuilds a logical device when it detects the removal and reinsertion of a drive that is part of a disk group. Use this operation
to force the rebuild to begin immediately, without physically removing and replacing the disk drive.
NOTE: The controllers can rebuild RAID level-1 logical devices. They cannot, however, rebuild RAID level-0 logical
devices because RAID level-0 is not redundant.
To manually rebuild a failed drive:
1. In the Physical devices view, click the failed physical drive.
2. Right-click Rebuild drive.
3. Click Yes.
NOTE: During the rebuild operation, the failed drive enters the rebuild state and the logical device remains degraded
until the rebuild operation is completed.
Rebuilding to a Hot-Spare
When a hot-spare drive is available, the rebuild operation begins automatically without the need to replace the failed drive. If
more than one drive fails within the same disk group, no rebuild takes place. If multiple drives fail in separate disk groups
(one physical drive per array), the controller initiates a rebuild operation for the logical devices within the disk group
containing the first failed physical drive. The rebuild operation is performed on the first hot-spare drive of sufficient size to
become a valid member of the disk group.
Verifying an Array
Use this action to check redundant logical drives for inconsistent or bad data. Verification is similar to Verify with Fix, except
that the RAID Storage Manager does not repair the drive if bad data is found. Verification can be a lengthy operation. You
cannot perform any other actions on the controller until the verification is completed. You can verify the logical drive
immediately or schedule it for another time. You can also schedule the verification as a recurring task. A recurring task starts
at the initial start time, then runs periodically according to the given interval: the same time each day, the same time each
week, or the same time each month.
NOTE: You cannot perform any other actions on the controller until the verification is completed. For example, you
cannot schedule a verification if another logical drive verification is in progress.