Date: Tue, 12 May 2015 20:01:30 -0400 From: Dan Langille <dan@langille.org> To: freebsd-scsi@freebsd.org Subject: Re: Dud tapes Message-ID: <B1544727-7A4F-49B4-B764-4A8D4E7FBFAD@langille.org> In-Reply-To: <8E91F289-EBE1-41C7-AC5E-7891108D8C54@langille.org> References: <DF7DE372-00A8-4012-8C37-37C03747A574@langille.org> <8E91F289-EBE1-41C7-AC5E-7891108D8C54@langille.org>
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[-- Attachment #1 --] > On May 7, 2015, at 6:03 PM, Dan Langille <dan@langille.org> wrote: > > >> On May 1, 2015, at 9:41 AM, Dan Langille <dan@langille.org> wrote: >> >> >> I'm using Bacula 7.0.5 on FreeBSD 10.1 (bacula-dir) and FreeBSD 9.3 (bacula-sd). >> >> Sometimes I get dud tapes. Or at least, tapes my tape drive does not like. >> >> For example: >> >> ### >> 01-May 09:39 crey-sd JobId 205441: End of Volume "FAI022" at 11:11326 on device "DTL03" (/dev/nsa0). Write of 64512 bytes got 49152. >> 01-May 09:39 crey-sd JobId 205441: Error: Error writing final EOF to tape. This Volume may not be readable. >> tape_dev.c:941 ioctl MTWEOF error on "DTL03" (/dev/nsa0). ERR=Input/output error. >> 01-May 09:39 crey-sd JobId 205441: End of medium on Volume "FAI022" Bytes=10,784,406,528 Blocks=167,168 at 01-May-2015 09:39. >> 01-May 09:39 crey-sd JobId 205441: 3307 Issuing autochanger "unload slot 2, drive 0" command. >> ### >> >> See also, this from /var/log/messages: >> >> ### >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 01 00 >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error) >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x28b4b >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00 >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error) >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x28b4b >> May 1 09:39:01 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 01 00 >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error) >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x11fb >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00 >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error) >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0x11fb >> May 1 09:42:41 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted >> ### >> >> In this case, I will mark the tape as DISABLED and once it is past it's recycling date, I will retire the tape. >> >> Best practice might be to rerun the backup, but this backup is also on disk. >> >> What do you usually do with tapes such as this? Is this tape or hardware? > > I took one of these tapes and tried: > > $ sudo tar -cf /dev/sa0 * > tar: Write error > > It produced these errors: > > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): WRITE FILEMARKS(6). CDB: 10 00 00 00 02 00 > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): CAM status: SCSI Status Error > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): SCSI status: Check Condition > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): SCSI sense: MEDIUM ERROR asc:c,0 (Write error) > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): Command Specific Info: 0xbac9 > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): Error 5, Retries exhausted > May 7 21:37:10 knew kernel: (sa0:sym0:0:1:0): failed to write terminating filemark(s) > > Is this a hardware problem? A tape problem? 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? — Dan Langille http://langille.org/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQJ8BAEBCgBmBQJVUpRaXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ1MTE2RjM0ODIzRDdERDM4OTY0OUJBNzdF QjIxNTlERUU5NzI3MzlGAAoJEOshWd7pcnOfA6EP/14lh+Vt/uHS5P/ch20hwxSo x1XYMKp742vMwswduw58wAPphpLEps/clI3OyW5vNR9zgz9fGnokozGGqxGuo3BJ 5S0LG9L1btZb4zY4UjxPDausGEwkzgcbSi5zPwC2IsRqPJtyQNksOYI3RkVMN6ii OCPG9P6ZguTwLh5FwXpPuhtEQwzRyEN3iW0wGpXXTSBFw+psTwGdNXhqC0OjCa4I w7zNJjkXuYSQ85ZdqniDaLh07whzQapu5/JBR8ib9fqy/1qO5M5ys+fYhlfFJC8F gb5WP9StRqdzA3JDoiOTAqaKL1Rz4vL4E7dbiWo/1Ez+0wLBADryIw+uTnDyCQas BTbbVtSrUHB316yXgZcntqg/CxKevVI1qHhfTkJadH2qfqi9ZAbyoualwmq5p1AA AzaqnzXnuPUCQQgSYkpSuqMF+LefZuQKbLnpZdGi7+tRiy42dWtpl/iPt88UQcN1 KFTQT8jD393iqU7Cd3lGVKsqsEQerK/zyXcgnZHhvnQ2VUc9I7159lfAL/zhEGGE fH147/g3VKQTF5CE15LUPV0xUaIkl1Wl96osg9tRIS7HMW7/a9clVI2wH6ZkfdLI 46+lbfvAvSxOPl5Xaj5pasLZwevCpF/dgRPUGa2X7iY93xL5kElWoYAO7/WzkgMM pYVNgWfws1IBhwSFw0mw =igBJ -----END PGP SIGNATURE-----
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