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From: LIN%mit-ml@sri-unix.UUCP
Newsgroups: net.micro.cpm
Subject: checksumming program for backing up disks...
Message-ID: <14983@sri-arpa.UUCP>
Date: Sun, 25-Dec-83 17:18:00 EST
Article-I.D.: sri-arpa.14983
Posted: Sun Dec 25 17:18:00 1983
Date-Received: Thu, 5-Jan-84 01:31:40 EST
Lines: 14

From:  Herb Lin <LIN@mit-ml>

When I back up my disks, I live in constant fear that I am trashing
a good copy of a file on my backup with a bad copy that somehow
found its way onto the disk that I am backing up.

it seems that a good solution to this would be the checksumming (or
other check) on a disk file that could be compared to a central file
of checksums somewhere.  Anyone know anything like this in 
the public domain or for cheap sale?

tnx.  I will forward responses to the net.

herb lin