I've having considerable trouble with writing to a simple tape drive and I'm
hoping that someone here has some experience with it:
I'm using a Quantum Superloader, so I've installed mtx to manipulate the
tapes. This part works without issue.
Load the tape from slot #3:
# mtx -f /dev/sg2 load 3
Now that it's in the drive, I try to tar something onto it:
# cd /
# tar cf /dev/st0 bin/
bin/
bin/bash
<a VERY long wait>
tar: /dev/st0: Cannot write: Input/output error
tar: Error is not recoverable: exiting now
After getting that error, I check /var/log/messages:
Dec 21 22:19:44 archiver kernel: st0: Block limits 2 - 16777214 bytes.
Dec 21 22:30:37 archiver kernel: st0: Error 400f0 (sugg. bt 0x0, driver bt
0x0, host bt 0x4).
Dec 21 22:30:48 archiver kernel: st0: Error with sense data: Current st0:
sense key Unit Attention
Dec 21 22:30:48 archiver kernel: Additional sense: Not ready to ready
change, medium may have changed
What the heck does this mean? I've checked the cables, everything seems
secure. Connectivity doesn't seem to be the problem because I can tell the
tape drive to do whatever I like without issue. The drive was just purchased
and the tapes are new so we don't have a cleaning tape (though I don't think
it'd be needed yet) so what's left?
Here's the output of /proc/scsi/scsi:
Attached devices:
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST39204LW Rev: 0006
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 05 Id: 05 Lun: 00
Vendor: BNCHMARK Model: DLT1 Rev: 5C3F
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 05 Id: 05 Lun: 01
Vendor: QUANTUM Model: UHDL Rev: 0028
Type: Medium Changer ANSI SCSI revision: 02
--
real men don't make backups.
they upload it via ftp and let the world mirror it.
- Linus Torvalds
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