I am running an OES Linux server with a large nss partition, which also has
a groupwise domain in the nss partition. Last night a drive went down and
now the pool will not activate from imanager. I receive the error:

Error: VTLPOOL1: Cannot change state for this pool. Error Number: The media
is corrupted because a hardware failure occurred, a disk media failure
occurred, or invalid data was written to the disk. Check the hardware and
disk media for failure. Otherwise, restore the backup data to the disk.

It was part of a raid 5 array and a disk did go down, but since then the
drive has been replaced and the array has been rebuilt. There dosent seem
to be any problems anywhere else, only the nss portion seems to be
corrupt... Are there any utilities that might help detect or repair errors
in the file system?