Dedupe Folder Offline

I am getting an error that my Dedupe Folder is offline.

This started after installing two hotfixes (147674 and 155520)

I tried rolling back the hotfixes but this did not resolve the issue.

I have since upgraded to R3 to see whether that resolved the issue, it has not.

I get these errors when running Backup Exec Debug Monitor:

PVLSVR:   [07/05/11 03:49:27] [9500]     PvlEntityDatabase::QueryEntity()
            ParentEntityType = MACHINE_ENTITY_TYPE
            ParentEntityGuid = {00000000-0000-0000-0000-000000000000}
            EntityType = DEVICE_ENTITY_TYPE
            EntityGuid = {1D8885D2-5DDB-49AD-852B-C2BCD8D6DA0E}
            EntityName = ""
            EntityFlags = 0x00000000

PVLSVR:   [07/05/11 03:49:27] [9500]     PvlEntityDatabase::QueryEntity()
            ParentEntityType = NULL_ENTITY_TYPE
            ParentEntityGuid = {00000000-0000-0000-0000-000000000000}
            EntityType = PDDE_CONFIGURATION_ENTITY_TYPE
            EntityGuid = {00000000-0000-0000-0000-000000000000}
            EntityName = "
            EntityFlags = 0x00000000

The error message in the jobs is:

Final error: 0xe000810c - Physical Volume Library Drive not available.
Final error category: Backup Device Errors

and

Final error: 0xe0008115 - Physical Volume Library Drive or Robot paused, offline, or disabled.
Final error category: Backup Device Errors

Is there any way to get my dedupe area to perform diagnostics and to fix it.  I would prefer not to lose the data in it if I can help it.

Any assistance would be appreciated.

Media Server:

Windows Server 2008 R2
Backup Exec 2010 R3
Local DAS SATA disks for Dedupe LUN (5TB)

Best Regards,
Bill