I have a server which every so often "loses" its SCSI tape drive. Dumps stop working a command like "mt rewind" returns an error "/dev/tape: No such file or directory". The message log shows Aug 3 04:56:40 mail kernel: scsi1:0:5:0: Attempting to abort cmd c1bda980: 0x0 0x0 0x0 0x0 0x0 0x0 Aug 3 04:56:40 mail kernel: scsi1:0:5:0: Command found on device queue Aug 3 04:56:40 mail kernel: scsi: Device offlined - not ready after error recovery: host 1 channel 0 id 5 lun 0 Aug 3 04:56:40 mail kernel: st0: Error 20000 (sugg. bt 0x0, driver bt 0x0, host bt 0x2). If I unload and reload the st module, the message log shows Aug 5 16:41:19 mail kernel: st: Version 20041025, fixed bufsize 32768, s/g segs 256 Aug 5 16:41:19 mail kernel: Attached scsi tape st0 at scsi1, channel 0, id 5, lun 0 Aug 5 16:41:19 mail kernel: st0: try direct i/o: yes (alignment 512 B), max page reachable by HBA 1048575 Which looks like it's finding the drive fine. But attempts to use /dev/tape (or /dev/st0) still fail. I have no other SCSI devices (my disks are on an i2o RAID card), but I can't remove the aic79xx module for the SCSI bus the tape is on -- it reports "ERROR: Module aic79xx is in use" and I can't work out what's using it. I can fix the problem by rebooting, but it would be nicer if I didn't have to. Any suggestions? Danny. Network Administrator School of Medical Sciences University of Sydney
