Re: Identifying a backup format from a tape
- From: Frank Slootweg <this@xxxxxxxxxxxxxxxxx>
- Date: 30 Sep 2007 20:46:13 GMT
yssong66@xxxxxxxxx <yssong66@xxxxxxxxx> wrote:
Hi,
I've got some disk failure on a very old HP-UX server recently and am
trying to restore data from tapes (DDS3 type).
I don't know what backup utility had been used on these tapes, so I
did:
# mt -t /dev/rmt/0mn rewind
# mt -t /dev/rmt/0mn fsf (since the 1st segment doesn't seem to have
anything)
# mt -t /dev/rmt/0mn fsf (same case for the 2nd segment)
# dd if=/dev/rmt/0mn of=/tmp/file bs=1024k (on the 3rd segment)
and /tmp/file was generated to show the index of files that had been
backed up, so I know what files had been included in the backup on
this tape.
This output file shows many files from all different filesystems (/, /
var, /usr, /data, /data2, etc.), so I assume that it's not a dd format
backup.
Now, how would I be able to identify the backup format and restore the
actual data? I tried tar, gtar, cpio, and even dd but it hasn't been
successful.
As Scott hinted at, it may well be in fbackup format, i.e. you can try
to use frecover to restore it. First use the '-I' option to get the
index from/off the tape.
In any case: You said:
# mt -t /dev/rmt/0mn rewind
# mt -t /dev/rmt/0mn fsf (since the 1st segment doesn't seem to have
anything)
Please redo the rewind an *do* read the first record, i.e.
# dd if=/dev/rmt/0mn of=/tmp/file bs=1024k (on the 3rd segment)
and check the size of /tmp/file. If it's 80 bytes, then the format is
most likely fbackup format and the /tmp/file file should be in readable
ASCII format.
Please report back with your findings.
.
- References:
- Identifying a backup format from a tape
- From: yssong66@xxxxxxxxx
- Identifying a backup format from a tape
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