atom feed70 messages in org.freebsd.freebsd-scsiSCSI tape data loss
FromSent OnAttachments
Kern SibbaldJun 1, 2003 10:54 am 
Dan LangilleJun 1, 2003 11:32 am 
Justin T. GibbsJun 1, 2003 1:08 pm 
Kern SibbaldJun 1, 2003 2:44 pm 
Justin T. GibbsJun 1, 2003 3:39 pm 
Matthew JacobJun 1, 2003 5:00 pm 
Matthew JacobJun 1, 2003 5:13 pm 
Dan LangilleJun 1, 2003 6:58 pm 
Matthew JacobJun 1, 2003 7:03 pm 
Kern SibbaldJun 2, 2003 1:28 am 
Kern SibbaldJun 2, 2003 1:29 am 
Kern SibbaldJun 2, 2003 1:57 am 
Kern SibbaldJun 2, 2003 3:45 am 
Dan LangilleJun 2, 2003 4:28 am 
Matthew JacobJun 2, 2003 8:05 am 
Justin T. GibbsJun 2, 2003 8:10 am 
Dan LangilleJun 2, 2003 8:14 am 
Matthew JacobJun 2, 2003 8:21 am 
Kern SibbaldJun 2, 2003 8:27 am 
Dan LangilleJun 2, 2003 9:46 am 
Dan LangilleJun 2, 2003 11:05 am 
Matthew JacobJun 2, 2003 11:11 am 
Justin T. GibbsJun 2, 2003 11:49 am 
Dan LangilleJun 2, 2003 12:06 pm 
Justin T. GibbsJun 2, 2003 12:10 pm 
Matthew JacobJun 2, 2003 1:14 pm 
Dan LangilleJun 2, 2003 2:16 pm 
Matthew JacobJun 2, 2003 2:24 pm 
Kern SibbaldJun 2, 2003 2:46 pm 
Matthew JacobJun 2, 2003 2:55 pm 
Kern SibbaldJun 2, 2003 3:31 pm 
Carl ReisingerJun 2, 2003 3:44 pm 
Matthew JacobJun 2, 2003 3:44 pm 
Dan LangilleJun 2, 2003 6:37 pm 
Kern SibbaldJun 3, 2003 12:28 am 
Kern SibbaldJun 3, 2003 6:07 am 
Carl ReisingerJun 3, 2003 6:19 am 
Kern SibbaldJun 3, 2003 6:37 am 
Carl ReisingerJun 3, 2003 7:01 am 
Matthew JacobJun 3, 2003 7:34 am 
Justin T. GibbsJun 3, 2003 7:51 am 
Kern SibbaldJun 3, 2003 8:05 am 
Kern SibbaldJun 3, 2003 8:11 am 
Matthew JacobJun 3, 2003 9:03 am 
Dan LangilleJun 3, 2003 9:10 am 
Justin T. GibbsJun 3, 2003 9:24 am 
Kern SibbaldJun 3, 2003 9:40 am 
Justin T. GibbsJun 3, 2003 10:03 am 
Kern SibbaldJun 3, 2003 10:19 am 
Kern SibbaldJun 3, 2003 10:34 am 
Matthew JacobJun 3, 2003 11:00 am 
Matthew JacobJun 3, 2003 11:16 am 
Matthew JacobJun 3, 2003 11:39 am 
Justin T. GibbsJun 3, 2003 12:12 pm 
Dan LangilleJun 3, 2003 12:43 pm 
Matthew JacobJun 3, 2003 12:46 pm 
Kern SibbaldJun 3, 2003 1:05 pm 
PostMaster GeneralJun 3, 2003 2:21 pm 
Kern SibbaldJun 4, 2003 12:20 am 
Matthew JacobJun 4, 2003 7:51 am 
Kern SibbaldJun 4, 2003 9:51 am 
Kern SibbaldJun 6, 2003 7:38 am 
Dan LangilleJun 6, 2003 8:59 am 
Matthew JacobJun 6, 2003 11:50 am 
Dan LangilleJun 20, 2003 6:17 pm 
Dan LangilleJul 1, 2003 5:07 pm 
Matthew JacobJul 1, 2003 11:11 pm 
Michael L. SquiresAug 25, 2003 4:16 am 
Dan LangilleAug 25, 2003 9:13 am 
Michael L. SquiresAug 27, 2003 5:27 am 
Subject:SCSI tape data loss
From:Kern Sibbald (ke@sibbald.com)
Date:Jun 2, 2003 3:31:39 pm
List:org.freebsd.freebsd-scsi

On Mon, 2003-06-02 at 23:55, Matthew Jacob wrote:

I suspect that the problem is something very simple such as the drive buffering data then hitting the physical EOM and of course any buffered data goes down the bit bucket.

A question to ask then is why tape_pattern_tester stopped at LEOT but Bacula didn't and kept going to PEOT.

-matt

This was just a thought, because you or Justin said that the driver does not fail writes at the LEOF, which means that unless you are doing something special in your tpt, it is not stopping at the LEOF.

One thought that I had is: the fact that Bacula backs up at the EOM to re-read the last record could cause some problems. I've asked Dan if he will re-run the Bacula backup/restore test but with the re-read disabled. As someone said, this will give one more data point.

Another interesting test would be to see if the same data loss occurs in a situation where a tape size is specified such that Bacula stops writing before the EOM on the first tape.

Best regards,

Kern