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[Bug-tar] Can't extract file from multivolume archive

From: stinga
Subject: [Bug-tar] Can't extract file from multivolume archive
Date: Fri, 3 Dec 2010 11:15:28 +0000

G''day all,
I am creating a tar acrhive that is spooled to LTO3 Tandberg Storage loader

tar -v -F/se/bin/change_tape.pl -b512 -cf /se/backup/dev/26803_tape -- same-permissions --totals --index-file=/se/backup/log/ Tuesday_2010-11-30:21:00:03_l0_tar.idx --exclude=/se/backup/ incremental_exclude.lst --newer-mtime='2010-11-27 08:57:48' /dsk1 >/se/ backup/log/Tuesday_2010-11-30:21:00:03_l0_tar.log 2>&1

It spans 9 tapes of about 4.4TiB

I have a file on tape 4 that I want to recover and I can't
I mount the tape, do

t:/restore# tar -Mxf /se/backup/dev/tape0 --wildcards '*SANY007*.MP4'
tar: se/data/Tmp/d/_mbv/GT/Final Outputs/Ep1end.avi: Cannot extract -- file is continued from another volume
tar: Skipping to next header
tar: *SANY007*.MP4: Not found in archive
tar: Exiting with failure status due to previous errors

If I put the previous tape in the drive and start from there, then swap when asked it works. Is this because it is a different tape or because a file starts on one tape and finishes on the next, thus getting the error?

The end result is it takes ages to recover a file from tape.

It seems that around 1.15.1 is when it changed.


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