User's Manual

292 Troubleshooting
Physical Disk is Offline or Displays an Error Status
A physical disk may display an error status if it has been damaged, taken
offline, or was a member of a virtual disk that has been deleted or initialized.
The following actions may resolve the error condition:
• If a user has taken the disk offline, then return the disk to Online status by
executing the
Online disk task.
• Rescan the controller. This action updates the status of storage objects
attached to the controller. If the error status was caused by deleting or
initializing a virtual disk, rescanning the controller should resolve this
problem.
• Investigate whether there are any cable, enclosure, or controller problems
preventing the disk from communicating with the controller. If you find a
problem and resolve it, you may need to rescan the controller to return the
disk to Online or Ready status. If the disk does not return to Online or
Ready status, reboot the system.
• If the disk is damaged, replace it. For more information, see Replacing a
Failed Disk.
A Disk is Marked as Failed When Rebuilding in a Cluster Configuration
When a system in a cluster attempts to rebuild a failed disk but the rebuild
fails, then another system takes over the rebuild. In this situation, you may
notice that the rebuilt disk continues to be marked as failed on both systems
even after the second system has rebuilt successfully. To resolve this problem,
perform a rescan on both systems after the rebuild completes successfully.
A Disk on a PERC 4/Di Controller Does not Return Online after a Prepare
to Remove
When you do a Prepare to Remove command on a physical disk attached to a
PERC 4/Di controller, you may find that the disk does not display in the
Storage Management tree view even after doing a rescan or a reboot.
In this case, to redisplay the disk in the Storage Management tree view:
1
Manually remove and then replace the physical disk.
2 Rescan the controller or reboot the system.