> # mt -f /dev/st0 rewind
> # file - < /dev/nst0
> /dev/stdin: gzip compressed data, from Unix
>
> # mt -f /dev/st0 rewind
> # tar tfz /dev/nst0
>
> tar: /dev/st0: Cannot read: Cannot allocate memory
> tar: At beginning of tape, quitting now
> tar: Error is not recoverable: exiting now
>
> gzip: stdin: unexpected end of file
> tar: Child returned status 2
> tar: Error exit delayed from previous errors

Just to be sure, I would try the following:

# tar -tz -f /dev/nst0

I personnaly do not use gzip compression because my DDS tape drive
does hardware compression. And if the compressed file is corrupted,
your entire archive is unreadable and you can't recover any file at
all.

I don not use the archive-host trick, I simply run BackupPC_tarCreate:

# sudo -u backuppc /usr/bin/BackupPC_tarCreate -h <hostname> \
#   -n -1 -s <data_set> / > /dev/nst0

Works rather well.

-- Vincent


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