On Apr 1, 2007, at 7:54 PM, George Sinclair wrote:
Hi,
I'm unable to recover all the data on an SDLT-2 tape from drive 2
of 4, but I *can* recover the same data from any of the other
drives in the same library!!! When using the afflicted drive, the
recovery fails on the first 277 files but then succeeds with the
remaining ones. However, the recover is completely successful when
run on any of the other 3 drives. Go figure! All the drives are the
same type and have the same firmware. Has anyone ever seen this
situation before? I've provided all details and error messages
further below. This tape was originally labeled on this library,
and there have been no changes to the software or equipment.
I should note that I've been using this tape library since Nov
2006, and I've seen only one error on drives 1 and 3 and none on 4.
Drive 2, however, has had several errors during the last week on
several tapes, not just the ones I was testing. The /nsr/logs/
messages and daemon.log files recorded some messages for these.
However, the "Consecutive errors" under the device under nwadmin
still showed 0 until I tried to recover the aforementioned data.
The errors I've seen in the log files for drive 2 have all been
like this:
Mar 22 01:08:06 server root: [ID 702911 daemon.notice] NetWorker
media: (notice) Volume "volume_name"on device "rd=snode:/dev/nst1":
Cannot decode block. Verify the device configuration. Tape
positioning by record is disabled
If anyone has any ideas or recommendations, I'd love to hear them.
Yup, if I were you, I would replace that tape drive and not use it to
do any backups or recovers until it can be replaced.
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