On Thu, 11 Mar 2004, Matt Temple wrote:

MT> Last month, one of my three AIT-3 drives (in a 126-Qualstar library)
MT> started showing tape mount filaures.  The following is a sample:
MT>
MT> 03/10/04 22:34:17 nsrd: media info: loading volume Full.0343 into /dev/nst1
MT> 03/10/04 22:34:35 nsrd: /dev/nst1 Verify label operation in progress
MT> 03/10/04 22:35:47 nsrd: media warning: /dev/nst1 reading: Success
MT> 03/10/04 22:36:07 nsrd: media warning: /dev/nst1 reading: no tape label
MT> found.
MT> 03/10/04 22:36:08 nsrd: /dev/nst1 Eject operation in progress
MT> ...
MT> 03/10/04 22:36:44 nsrd: Jukebox 'jukebox1' failed: expected volume
MT> 'Full.0343' got 'NULL'.
MT>
MT> This will show up for all available tapes.
MT> No problem with the other drives.
MT>
MT> My first conclusion is simply that the drive is failing.   To complicate
MT> matters, if I power down the Qualstar unit, /dev/nst1 will mount
MT> a tape, once.   Then the above will occur.
MT>
MT> Has anyone experienced this sort of problem?
MT> Does anyone have any ideas beyond sticking a fork
MT> in the drive?

Yes. I had the exact same problem last week. It was due to a broken AIT-2
drive.

What I did to troubleshoot it was the following - you should probably try
it too:

1. shut down networker
2. open the jukebox or otherwise disable it so you can manually feed media
into the drives
3. take a known good tape - a brand new tape might be sufficient too and
insert it into one of the drives
4. check the status of the drive with mt and confirm that there is a tape
in the drive
5. tar some medium-sized directory to the tape and then do a tar cvf to
verify the data.
6. repeat for each drive
7. repair/burn the malfunctioning drive ;)

//Oscar

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