Unrecovered read error

[Chadi]

I see a lot of these errors in /var/log/messages

Nov 28 02:48:39 freenas kernel: (da0:twa0:0:0:0): SCSI sense: MEDIUM ERROR asc:11,0 (Unrecovered read error)
Nov 28 02:48:40 freenas kernel: (da0:twa0:0:0:0): WRITE(10). CDB: 2a 0 1f f1 93 c0 0 0 c0 0
Nov 28 02:48:40 freenas kernel: (da0:twa0:0:0:0): CAM status: SCSI Status Error
Nov 28 02:48:40 freenas kernel: (da0:twa0:0:0:0): SCSI status: Check Condition
Nov 28 02:48:40 freenas kernel: (da0:twa0:0:0:0): SCSI sense: MEDIUM ERROR asc:11,0 (Unrecovered read error)

Code:

Filesystem             Size    Used   Avail Capacity  Mounted on
/dev/ufs/FreeNASs1a    927M    375M    477M    44%    /
devfs                  1.0K    1.0K      0B   100%    /dev
/dev/md0               4.6M    1.8M    2.3M    44%    /etc
/dev/md1               824K    2.0K    756K     0%    /mnt
/dev/md2               149M    8.8M    128M     6%    /var
/dev/ufs/FreeNASs4      20M    1.1M     17M     6%    /data
/dev/ufs/backups       1.1T    709G    301G    70%    /mnt/backups

FreeNAS-8.0.3-RELEASE-x64 (9395)

 

[Chadi]

Please assist on this.

 

[cyberjock]

Why not use Google to search for what the error means? Someone else posted on this 2 weeks ago and he JUST posted(just as in today) that he is RMAing the drive.