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GNU Tar question
From: |
Rowley, David |
Subject: |
GNU Tar question |
Date: |
Tue, 11 Sep 2001 17:53:20 -0400 |
First posting to
this list. Couldn't find a list for questions about gnu tar. If this
is the wrong forum for this question, please let me know.
We tried to write a
48-GB gzipped file to a DLT7000 drive using gnutar on our Sun E450 running
Solaris 2.6. The file was too large to fit on one DLT tape so we used the
following command so it would span tapes:
/usr/local/bin/tar
--multi-volume -cvf /dev/rmt/1 <filename>.gz
When the operation
had been running for about three hours, we got the following error
message:
/usr/local/bin/tar:
WARNING: Cannot close /dev/rmt/1 (3, -1): I/O error
Prepare volume #2
for /dev/rmt/1 and hit return:
/usr/local/bin/tar:
Cannot open /dev/rmt/1: I/O error
In our
/var/adm/messages file, we got "Sense Key: Volume Overflow" messages at this
time.
After we put in
another tape, the error messages stopped and it appeared that the tar command
must have started writing to the tape again. We waited for another 3 hours
or so, then concluded that the tar command must not be working correctly.
It should have finished quickly with the second tape, since the file was only 48
GB. 40 GB should have fit on tape one and just 8 GB more on tape
two.
We stopped the tar
at this time.
Here are my
questions:
1. Why did we get
error messages?
2. Is there a size
limit to gnutar files?
3. Is our tar
command correct? Are there other options we should use, maybe the
"--tape-length" option?
4. Are there any
bugs we should know about?
5. Does the fact
that the file was gzipped have any impact? Should we have used the
uncompressed file and then used hardware compression?
Any answers would be
greatly appreciated!
Thanks,
Dave
David
Rowley
Unix Systems
Administrator
Seisint,
Inc.
6601 Park of
Commerce Blvd.
Boca Raton, Florida 33487
address@hidden
Direct 561.999.3986
Main
561.999.4400
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561.999.4676
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Thank you
- GNU Tar question,
Rowley, David <=