User's Manual

Troubleshooting 287
• The virtual disk is non-redundant —For example, a RAID 0 virtual disk
cannot be rebuilt because RAID 0 does not provide data redundancy.
•
There is no hot spare assigned to the virtual disk —As long as the virtual
disk is redundant, to rebuild it:
– Pull out the failed physical disk and replace it. A rebuild automatically
starts on the new disk.
– Assign a hot spare to the virtual disk and then perform a rebuild.
•
You are attempting to rebuild onto a hot spare that is too small —
Different controllers have different size requirements for hot spares. For
more information on disk size requirements, see Considerations for Hot
Spares on PERC 4/SC, 4/DC, 4e/DC, 4/Di, 4e/Si, 4e/Di, PERC 5/E, PERC
5/i, PERC 6/E, PERC 6/I, and CERC 6/I Controllers and Considerations
for Hot Spares on CERC SATA1.5/6ch, S100, and S300 Controllers.
•
The hot spare has been unassigned from the virtual disk —This could
happen on some controllers if the hot spare was assigned to more than one
virtual disk and has already been used to rebuild a failed physical disk for
another virtual disk. For more information, see Considerations for Hot
Spares on CERC SATA1.5/6ch, S100, and S300 Controllers.
•
On SCSI controllers, both redundant and non-redundant virtual disks
reside on the same set of physical disks
—On the PERC 4/SC, 4/DC,
4e/DC, and 4/Di controllers, a rebuild is not performed for a physical disk
that is used by both redundant and non-redundant virtual disks. In order
to rebuild the redundant virtual disk, you need to delete the non-
redundant virtual disk. Before deleting this disk, however, you can attempt
to recover data from the failed physical disk by forcing it back online. For
more information, see Using the Physical Disk Online Command on
Select Controllers.
•
A physical disk has been removed, and the system has not yet
attempted to write data to the removed disk
—In this case, the system
does not recognize the removal of a physical disk until it attempts a write
operation to the disk. If the physical disk is part of a redundant virtual disk,
then the system rebuilds the disk after attempting a write operation. This
situation applies to PERC 4/SC, 4/DC, 4e/DC, and 4/Di controllers.