Filesystem Plugin restore fails with a 'ASC 11 ASCQ 00' and 'UNRECOVERED READ ERROR' error. (4037855)

Filesystem Plugin restore fails with a 'ASC 11 ASCQ 00' and 'UNRECOVERED READ ERROR' error.

Filesystem Plugin restore fails with the following messages and errors:

1] Job Message   2015/01/16 07:54:16   1961   Jobs   netvault_server   Starting job 1961 'sods rest test' (Phase 1 , Instance 1) for UID 0
2] Job Message   2015/01/16 07:54:16   1961   Data Plugin   nods   File System 7.9.9 restore
3] Information   2015/01/16 07:54:17   1961   Data Plugin   nods   Current host :  OS 'SOLARIS' System 'SunOS' Node 'sods' Release '5.10' Version 'Generic_141444-09' Machine 'sun4u'
4] Job Message   2015/01/16 08:01:08   1961   Media   netvault_server   (netvault_server: SL_00X4U78C4554_LL0 (IBM 3573-TL)) Media in 'DRIVE 1:netvault_server' assigned to job ready for data transfer
5] Information   2015/01/16 08:01:08   1961   Media   netvault_server   Using network socket for data transfer
6] Error   2015/01/16 08:13:49   1961   Media   netvault_server   netvault_server SL_1210295282 (IBM ULT3580-TD3): had media error

With sub text:
This will almost certainly be a hardware error either with the SCSI card. The problem is probably not due to drive order as there is no message that the library cannot move a tape to/from a slot.

SCSI       25       0  81349 CMD READ [ 08 01 00 00 01 00  ]
SCSI       17       0  81349 CMD SENSE KEY 'MEDIUM ERROR   ' [3] - ASC 11 ASCQ 00
SCSI       18       0  81349 CMD SENSE INFO 'UNRECOVERED READ ERROR'
TAPESCSI   79       0  81349 Unexpected error reading media
MEDREAD   305       0  81349 Device read data returned 257(0x101)

7] Error   2015/01/16 08:13:49   1961   Media   netvault_server   (netvault_server: SL_00X4U78C4554_LL0 (IBM 3573-TL)) Drive 'DRIVE 1:netvault_server' has completed its transfer

With sub text:
DEVMGR    273       0  81349 bHardwareError = TRUE

8] Error   2015/01/16 08:13:50   1961   Data Plugin   nods   Fatal error while processing item : 'Error reading from media'

With sub text:
SWIFTdata01.dbf

9] Warning   2015/01/16 08:13:50   1961   Data Plugin   nods   1 items and their contents  could not be restored

With sub text:
/data2/oradata/dbsSWIFT/SWIFTdata01.dbf : reading from media

This is a hardware issue outside of NVBU i.e. problems reading the media and will need to check the NetVault Server Motherboard (not likely though), SCSI/FC Card (if the SCSI Card has RAID on it, then try a non-RAID SCSI Card, as more reliable – Adaptec are good), SCSI/FC Card firmware, SCSI/FC cables, SCSI Terminators, tape library, drive(s), library firmware, drive(s) firmware and media itself.
The tape library drives at the time of the backup could also have had a problem with the Read/Write Head i.e. a hardware issue or was dirty and couldn’t transfer part or all the data correctly during the backup to tape.

In this instance the tape library Firmware version was below the minimum supported version and the tape library also had a hardware issue.
The tape library was replaced to resolve this issue.

Note: Whenever you make any hardware/firmware/cable changes and/or upgrades, then you also have to perform the following steps to make sure that the SCSI Protocol Communication Channel has been re-established (otherwise you will experience media/device/job issues):

a] Make a screenshot of the tape library name and configuration settings, so that the device can be re-added with the same tape library name and configuration settings.
b] Remove the tape library in NetVault Device Management.
c] Reboot the NetVault Server.
d] Re-add the tape library, making sure that the same tape library name and configuration settings are implemented.

Note: Please check the NetVault Backup - Supported VTLs, Libraries, Tape and Optical Drives compatibility guide on the following link to make sure that your tape library/drive are supported and that the library/drive firmware versions are above the minimum supported version too:

https://support.quest.com/netvault-backup/technical-documents