User's Manual

Troubleshooting 283
Replacing a Failed Disk
You may need to replace a failed disk in the following situations:
• Replacing a Failed Disk that is Part of a Redundant Virtual Disk
• Replacing a Failed Physical Disk that is Part of a Non-Redundant Virtual
Disk
• Replacing a Failed Physical Disk in a RAID 1 on a CERC SATA1.5/2s
Replacing a Failed Disk that is Part of a Redundant Virtual Disk
If the failed disk is part of a redundant virtual disk, then the disk failure
should not result in data loss. You should replace the failed disk immediately,
however, as additional disk failures can cause data loss.
If the redundant virtual disk has a hot spare assigned to it, then the data from
the failed disk is rebuilt onto the hot spare. After the rebuild, the former hot
spare functions as a regular physical disk and the virtual disk is left without a
hot spare. In this case, you should replace the failed disk and make the
replacement disk a hot spare.
NOTE: If the redundant virtual disk does not have a hot spare assigned to it,
then replace the failed disk using the procedure described in Replacing a
Physical Disk Receiving SMART Alerts
Replacing the Disk:
1 Remove the failed disk.
2 Insert a new disk. Make sure that the new disk is the same size or larger as
the disk you are replacing. On some controllers, you may not be able to use
the additional disk space if you insert a larger disk. For more information,
see Virtual Disk Considerations for Controllers.
A rebuild is automatically initiated because the virtual disk is redundant.
Assigning a Hot Spare:
If a hot spare was already assigned to the virtual disk, then data from the
failed disk may already be rebuilt onto the hot spare. In this case, you need to
assign a new hot spare. For more information, see Assign and Unassign
Dedicated Hot Spare and Assign and Unassign Global Hot Spare.