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09-05-2002 08:05 AM
09-05-2002 08:05 AM
" unable to read the volume header " , why this happen?
can the files be recoverd? Thank you very much.
Solved! Go to Solution.
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09-05-2002 08:08 AM
09-05-2002 08:08 AM
Re: Restore failure
give complete syntax.(for frecover also)
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09-05-2002 08:09 AM
09-05-2002 08:09 AM
Solution- used a tape that did not have fbackup data on it
- or the tape itself went bad
- or the tape drive itself went bad.
Try cleaning the tape drive first.
Try doing some simple fbackup/frecover on the drive with a new tape to determine if it is the drive.
Double check your backup processes. Many administrators have developed scripts to do their backuping and don't find until a month later when they want to restore, that the script was in error and failing.
Good Luck
-- Rod Hills
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09-05-2002 08:14 AM
09-05-2002 08:14 AM
Re: Restore failure
Test the tape drive works outside of fbackup:
# dd if=/dev/rmt/0m of=/dev/null bs=1 count=1
Does this command succeed or fail?
A failure would look like:
dd read error: I/O error
0+0 records in
0+0 records out
Check /var/adm/syslog/syslog.log, dmesg and STM (Diagnostics) for any other errors which might indicate a problem with the tape drive.
Cheryl
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09-05-2002 08:46 AM
09-05-2002 08:46 AM
Re: Restore failure
fbackup -v -n -f -I -c
frecover is using `sam'
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09-05-2002 08:51 AM
09-05-2002 08:51 AM
Re: Restore failure
Following "-f" should be the device you are backing up to.
Can you look at the log of output generated by "fbackup"? You may want to see if their were any problems.
-- Rod Hills
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09-05-2002 01:47 PM
09-05-2002 01:47 PM
Re: Restore failure
It is `frecover fbackup -v -n -f /dev/rmt/0m -i /etc/backup.file -c -g /etc/backuplist.txt` , I make sure the statement is no problem cos I use for long time, how can I recover the files without read the volume header? Thank you very much.
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09-05-2002 03:00 PM
09-05-2002 03:00 PM
Re: Restore failure
frecover(5409): unable to read volume header
frecover(5418): not an fbackup volume; unable to read volume header
frecover(2105): did not find expected file marker
frecover(5412): Do you wish to try to salvage this volume?
(^[yY]/^[nN]) y
frecover(5413): attempting to read backup following bad volume header
frecover(5426): read error while attempting to read index. Skipping.
frecover(5401): Volume 1 completed.
frecover(5404): Press return when the next volume is ready on
/dev/rmt/c4t0d0BES
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09-05-2002 03:35 PM
09-05-2002 03:35 PM
Re: Restore failure
Now it's possible that someone started to write on the tape after fbackup was finished. It's imperative that any backup procedure popout the tape once it's finished. It's just too easy to write on whatever tape is in the drive...and it was your backup.
Bill Hassell, sysadmin
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09-05-2002 09:30 PM
09-05-2002 09:30 PM
Re: Restore failure
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09-05-2002 10:03 PM
09-05-2002 10:03 PM
Re: Restore failure
Are you ABSOLUTELY SURE that your fbackup is working correctly? I would check your logs VERY CLOSELY as you may have problems with your backup.
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09-05-2002 11:49 PM
09-05-2002 11:49 PM
Re: Restore failure
Thanks.
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09-06-2002 06:24 AM
09-06-2002 06:24 AM
Re: Restore failure
Therefore I'm sorry to say I don't think the data (if it existed) is recoverable.
-- Rod Hills
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09-09-2002 06:21 AM
09-09-2002 06:21 AM
Re: Restore failure
The backup is restorable as we have tried it. For some reason the Label / Header is not been written correctly.