Hi,
15.05.2008 01:25, Mark Nienberg wrote:
> I continue to be plagued with the problem shown below. About 80% of the time
> it
> works perfectly. The rest of the time I have to use bconsole to unmount,
> then mount
> the tape again. The second read always works and the backup continues. Of
> course it
> happens in the middle of the night when the changer switches tapes and so I
> have to
> intervene the next day.
>
> The good news is this has nothing to do with the tape change. The
> mtx-changer script
> is waiting until the mt command returns a status of ONLINE. It does so
> successfully,
> and I can see it in the mtx-changer log. This means the drive was able to
> read the
> system area of the tape and is happy with it. I don't know why then bacula
> has
> trouble reading the data portion.
Perhaps a simple extra wait time after the load operation would be enough.
> I'm thinking about writing a script that cron could run every hour to see if
> the
> device is blocked even if the correct tape is loaded. If so, it could do a
> unmount/mount.
That would be possible, I guess.
> Or maybe I could add some command to the changer script to read some
> data off the tape after it loads or something?
You could even call btape to read the tape label and retry that a few
times... parsing the output for a valid label shouldn't be too hard.
> Or maybe bacula could be improved to
> try harder (whatever that means) to resolve the issue on its own?
Hmm... Bacula relies on mtx-changer to leave a usable tape in the
drive, so you're on the right track to look at mtx-changer here.
> Bacula 2.2.8 with a VXA320 drive and packetloader changer.
>
> Thanks for any ideas.
>
> Mark
Arno
> 10-May 07:24 khyber-dir JobId 2043: All records pruned from Volume
> "A0000006";
> marking it "Purged"
> 10-May 07:24 khyber-dir JobId 2043: Recycled volume "A0000006"
> 10-May 07:24 khyber-sd JobId 2043: 3307 Issuing autochanger "unload slot 3,
> drive 0"
> command.
> 10-May 07:25 khyber-sd JobId 2043: 3304 Issuing autochanger "load slot 5,
> drive 0"
> command.
> 10-May 07:26 khyber-sd JobId 2043: 3305 Autochanger "load slot 5, drive 0",
> status is OK.
> 10-May 07:26 khyber-sd JobId 2043: 3301 Issuing autochanger "loaded? drive 0"
> command.
> 10-May 07:26 khyber-sd JobId 2043: 3302 Autochanger "loaded? drive 0", result
> is Slot 5.
>
> 10-May 07:26 khyber-sd JobId 2043: Error: block.c:995 Read error on fd=7 at
> file:blk
> 0:0 on device "VXA3drive" (/dev/nst0). ERR=Input/output error.
> 10-May 07:26 khyber-sd JobId 2043: Error: block.c:995 Read error on fd=7 at
> file:blk
> 0:0 on device "VXA3drive" (/dev/nst0). ERR=Input/output error.
> 10-May 07:26 khyber-sd JobId 2043: Error: block.c:995 Read error on fd=7 at
> file:blk
> 0:0 on device "VXA3drive" (/dev/nst0). ERR=Input/output error.
> 10-May 07:26 khyber-sd JobId 2043: Error: block.c:995 Read error on fd=7 at
> file:blk
> 0:0 on device "VXA3drive" (/dev/nst0). ERR=Input/output error.
> 10-May 07:26 khyber-sd JobId 2043: Error: block.c:995 Read error on fd=7 at
> file:blk
> 0:0 on device "VXA3drive" (/dev/nst0). ERR=Input/output error.
>
> 10-May 07:26 khyber-sd JobId 2043: Please mount Volume "A0000006" or label a
> new one for:
> Job: gecko.2008-05-10_01.05.59
> Storage: "VXA3drive" (/dev/nst0)
> Pool: WeekBar
> Media type: VXA3
>
> --snip--
>
> 10-May 09:22 khyber-sd JobId 2043: 3301 Issuing autochanger "loaded? drive 0"
> command.
> 10-May 09:22 khyber-sd JobId 2043: 3302 Autochanger "loaded? drive 0", result
> is Slot 5.
> 10-May 09:22 khyber-sd JobId 2043: Recycled volume "A0000006" on device
> "VXA3drive"
> (/dev/nst0), all previous data lost.
> 10-May 09:22 khyber-sd JobId 2043: New volume "A0000006" mounted on device
> "VXA3drive" (/dev/nst0) at 10-May-2008 09:22.
> 10-May 10:11 khyber-sd JobId 2043: Job write elapsed time = 07:00:09,
> Transfer rate =
> 8.237 M bytes/second
>
>
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--
Arno Lehmann
IT-Service Lehmann
www.its-lehmann.de
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