Martin Würtele wrote: > > hi, > > i have a problem with my scsi tape (HP C1537A DDS3): > > the scsi ids are set as follows: > Host: scsi0 Channel: 00 Id: 00 Lun: 00 > Vendor: IBM Model: DNES-318350Y Rev: SA30 > Type: Direct-Access ANSI SCSI revision: 03 > Host: scsi0 Channel: 00 Id: 01 Lun: 00 > Vendor: IBM Model: DNES-318350Y Rev: SA30 > Type: Direct-Access ANSI SCSI revision: 03 > Host: scsi0 Channel: 00 Id: 03 Lun: 00 > Vendor: HP Model: C1537A Rev: L907 > Type: Sequential-Access ANSI SCSI revision: 02 > inetmain:/etc/afbackup# > > and mt -f /dev/nst0 stat reports > drive type = Generic SCSI-2 tape > drive status = 620756992 > sense key error = 0 > residue count = 0 > file number = 54 > block number = 0 > Tape block size 0 bytes. Density code 0x25 (unknown). > Soft error count since last status=0 > General status bits on (89010000): > EOF EOD ONLINE IM_REP_EN > > but when i start afbackup the server always reports: > mt: /dev/nst0: Input/output error > > but it dows increase the file nr and if i kill it (i know i never should but > as i can't be shure the backup is written...) i see eg > drive type = Generic SCSI-2 tape > drive status = 620756992 > sense key error = 0 > residue count = 0 > file number = 54 > block number = 0 > Tape block size 0 bytes. Density code 0x25 (unknown). > Soft error count since last status=0 > General status bits on (89010000): > EOF EOD ONLINE IM_REP_EN > > and mt -f /dev/nst0 rewind works as well. > > what problem could this be? before changing to the DDS 3 tape drive > the DDS 2 drive worked fine. > > any ideas? >
You might want to try to isolate the problem a bit to see if the problem has to do with the backup software. A simple way to check this would be to use tar to write and subsequently read back a small backup. Something like: tar cvf /dev/st0 dir_you_want_to_backup should write the backup to the tape and: tar df /dev/st0 should read the tape and perform a diff with the files on disk. If everything is ok no output should be generated. Happy hacking, \Gandalf
