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From: bob@morningstar.com (Bob Sutterfield)
Newsgroups: comp.sys.sun
Subject: Verification of backups.
Keywords: Miscellaneous
Message-ID: <1990Sep20.204529.2184@rice.edu>
Date: 21 Sep 90 00:11:27 GMT
Sender: sun-spots-request@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Originator: spots@titan.rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 319, message 8

GNU Tar has a verify option (-W).  The Info section comments that
"Verification requires that the archive be on a back-space-able medium.
This means pipes, some cartridge tape drives, and some other devices
cannot be verified."