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:Matthew Jacob (mja@feral.com)
Date:Jun 3, 2003 11:00:23 am
List:org.freebsd.freebsd-scsi

There are now a lot more things making sense because I've had other FreeBSD users report "unbelievable" output from a simple test program I have. I'll respond below, but with the latest test results, the problem seems to be generated from the simple sequence:

write() ... write() ioctl(MTEOF) ioctl(MTEOF) ioctl(MTREW)

is there any reason why writing two end of file marks followed by a rewind after a series of writes should create data loss?

No. That, in fact, whould flush data to the tape. Additional filemarks should not be written even after you close here because the rewind would clear SA_FLAG_TAPE_WRITTEN so a subsequent close won't write more.

I'm playing around with this some as we speak.

-matt