Date: Fri, 15 May 2015 17:59:59 -0400 From: Dan Langille <dan@langille.org> To: Don Lewis <truckman@FreeBSD.org> Cc: freebsd-scsi@FreeBSD.org Subject: Re: Dud tapes Message-ID: <BDAFE188-69BC-4FAD-904A-51C8C8A24521@langille.org> In-Reply-To: <201505152107.t4FL73nP021839@gw.catspoiler.org> References: <201505152107.t4FL73nP021839@gw.catspoiler.org>
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[-- Attachment #1 --] > On May 15, 2015, at 5:07 PM, Don Lewis <truckman@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/ [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQJ8BAEBCgBmBQJVVmxrXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ1MTE2RjM0ODIzRDdERDM4OTY0OUJBNzdF QjIxNTlERUU5NzI3MzlGAAoJEOshWd7pcnOfPMYQAKXLV6vOk2j6upRa/A89dTFc c+EDWIanEJybPOXWPQOvZDs42687YGrkxDBfQl3NA4WIlOD8Ps24RQSk89kmsqM1 Uj75hV8AM7a9PBCCPhvSUNosEqBXNxqkhn343FWZDaBTuLPKFlbJw2dc6flBJbPF 63S0oBJPv4E1qi3wlXDoAHUkyMJNnmaSYQaclJzLlNzKO4Y9eqljonIGWXUQk8qM 0vv2UMIrcnYQhysqM5hgc3sM4ixfKYNtjhjnSOHbtpAxmLBGA3M1j5p6L9L1SUo+ rV+TEbtO2jiqNWWjzRrIw48AetNQN5/eoxZAuJehf3eUSr4Sk86c7Rag+0BVYqjI 6lLfKwW8bT+oBRWxQaRBmnss0nOWa3KG1ZXPoRosliVMslXUg9ynjAQtTfIei0aE OJigM0/A3BsvTCKurDZq9jZfGtU9H1EWcvUiiHMqb4gtTqnkGNRaEbDAs97dP7OA ujKvw51eYLPwPPEJc+8lz3XdOrmKhj9dlNYPmavKTYKZ9sNzFsVy47Qb1UkrIQw3 M9x8cXTWuuNLJbL0BR0mSBXpKSBfYsuhmUttw/7CXj4gD6x9QArIiHhUr3P/ltCh QJp+v58C/vqXZB9N0u6FjJ3NuJ5UXsIk4vnFJEkMAlSwOxxn52rSGHAbyNnoaFRI 6raTcf0LXewr92FJL4Ki =NBIv -----END PGP SIGNATURE-----
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