Dud tapes

[Dan Langille]

> On May 15, 2015, at 5:07 PM, Don Lewis <truckman at FreeBSD.org> wrote:
> 
> On 12 May, Dan Langille wrote:
> 
>> The problem occurred today on another tape after writing just 313 MB:
>> 
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 01 00
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x1228
>> May 12 08:28:21 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error)
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x1228
>> May 12 08:28:22 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted
>> 
>> The tape before this took 111 GB, the tape after, took 791 MB (and then the backup completed).
>> 
>> What do these errors mean? Does it indicate a dead tape?
> 
> Bad tape, dirty or defective head, some sort of mechanical tape handling
> problem that affects the tape tension or movement, or less likely some
> other drive problem.  MEDIUM ERROR means that the drive couldn't write
> the bits to the tape and read them back correctly.

I have a bunch of new-to-me tapes.  So far, 5 out of 15 have resulted in that error.

—
Dan Langille
http://langille.org/





-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 971 bytes
Desc: Message signed with OpenPGP using GPGMail
URL: <http://lists.freebsd.org/pipermail/freebsd-scsi/attachments/20150515/272aeafb/attachment.sig>