Date: 30 Oct 2003 15:53:46 -0800 From: Trevor Blackwell <tlb@anybots.com> To: freebsd-questions@freebsd.org Subject: Travan SCSI tape random failures Message-ID: <1067558026.53841.86.camel@tlb>
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I'm running 4.7-RELEASE on a dual P4-Xeon machine and trying to back up to a Seagate 10/20 GB Travan tape drive: sa0 at ahd1 bus 0 target 4 lun 0 sa0: <Seagate STT20000N 6A51> Removable Sequential Access SCSI-2 device sa0: 10.000MB/s transfers (10.000MHz, offset 15) It's in the default mode: tlb tlb$ sudo mt -f /dev/sa0.ctl status Mode Density Blocksize bpi Compression Current: 0x47 variable 0 disabled ... When I write to it, it usually fails after a few hundred MB, but the amount of data is not repeatable even when I write identical files. For example: tlb tlb$ sudo dd of=/dev/nsa0 if=[huge file] bs=10240 dd: /dev/nsa0: short write on tape device 18139+0 records in 18138+1 records out The kernel reports: /kernel: (sa0:ahd1:0:4:0): WRITE FILEMARKS. CDB: 10 0 0 0 1 0 /kernel: (sa0:ahd1:0:4:0): MEDIUM ERROR info:1 asc:c,0 /kernel: (sa0:ahd1:0:4:0): Write error /kernel: (sa0:ahd1:0:4:0): failed to write terminating filemark(s) /kernel: (sa0:ahd1:0:4:0): tape is now frozen- use an OFFLINE, REWIND or MTEOM command to clear this state. The drive and tape are both new; I haven't used this kind before. Any suggestions? -- Trevor Blackwell tlb@anybots.com (650) 210-9272
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