Sun Managers,
Thanks for more responses!
The question:
I have an HP C5653A SurStore DAT24eU external tape drive attached to a
SPARCstation 5 running Solaris-2.7. I had a tape filled with files
containing data. Then, accidentally I wrote a file at the beginning of
the tape. My thought is that if I could get past this file, I could get
into the remaining good files and do some recovery. The problem is that
I can't seem to get past this initial file. I tried the mt command to
skip past filemarks and I tried a program usind open/read/ioctl to read
records and skip filemarks. I always end up with an "I/O error" and it
will not go any further than the first file. Are the any ways to get
around this problem?
The new consensus:
1) Rewind the tape
2) Start writing a file that is bigger than the one that was accidentally
written on the tape
3) When you think it is past the offending EOT mark, pull the power
plug on the tape drive (this could hang up your system). This keeps the
EOT mark from being automatically written
4) When you get things going again and the tape rewound, skip over one
EOF mark
Now you are sitting at the beginning of the first good tape file!
I had contacted one data recovery house:
$250 initial fee
$500 - $3500 for recovery
Ouch!
With these new suggestions in hand and the cost factor urging me on, I
did try it out on a test tape. It worked! Now I will try it on the real
tape. The trick is in knowing when to "pull the plug". I can find the
size of the offending file and estimate the time needed to write past
the EOT (but not too far past).
Isn't this group great!!!!
Thanks for the new responses:
Gaylord Holder
Brooke King
Mike Salehi
Roy Ramberg
R. Jesus Garcia
Nadya Williams
Bolson
Chris Marble
Tom
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Tom Kinter tmk@mayo.edu 507-284-4981
Mayo Foundation Rochester MN 55905 USA
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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