From owner-freebsd-scsi@FreeBSD.ORG Fri May 15 22:00:16 2015 Return-Path: Delivered-To: freebsd-scsi@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 226D7513; Fri, 15 May 2015 22:00:16 +0000 (UTC) Received: from clavin1.langille.org (clavin.langille.org [162.208.116.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "clavin.langille.org", Issuer "StartCom Class 2 Primary Intermediate Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D1E2C196C; Fri, 15 May 2015 22:00:15 +0000 (UTC) Received: from (clavin1.int.langille.org (clavin1.int.unixathome.org [10.4.7.7]) (Authenticated sender: hidden) with ESMTPSA id CECE455CB ; Fri, 15 May 2015 22:00:12 +0000 (UTC) Subject: Re: Dud tapes Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) Content-Type: multipart/signed; boundary="Apple-Mail=_A0977348-11B1-436E-A7FD-9B6509784C0A"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Pgp-Agent: GPGMail 2.5b6 From: Dan Langille In-Reply-To: <201505152107.t4FL73nP021839@gw.catspoiler.org> Date: Fri, 15 May 2015 17:59:59 -0400 Cc: freebsd-scsi@FreeBSD.org Message-Id: References: <201505152107.t4FL73nP021839@gw.catspoiler.org> To: Don Lewis X-Mailer: Apple Mail (2.2098) X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 May 2015 22:00:16 -0000 --Apple-Mail=_A0977348-11B1-436E-A7FD-9B6509784C0A Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On May 15, 2015, at 5:07 PM, Don Lewis wrote: >=20 > On 12 May, Dan Langille wrote: >=20 >> The problem occurred today on another tape after writing just 313 MB: >>=20 >> 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 >>=20 >> The tape before this took 111 GB, the tape after, took 791 MB (and = then the backup completed). >>=20 >> What do these errors mean? Does it indicate a dead tape? >=20 > 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. =E2=80=94 Dan Langille http://langille.org/ --Apple-Mail=_A0977348-11B1-436E-A7FD-9B6509784C0A Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----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----- --Apple-Mail=_A0977348-11B1-436E-A7FD-9B6509784C0A--