Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!rutgers!rochester!cornell!batcomputer!dyckman
From: dyckman@batcomputer.tn.cornell.edu (Howard L. Dyckman)
Newsgroups: comp.sys.mac
Subject: Re: disk checker request
Message-ID: <2404@batcomputer.tn.cornell.edu>
Date: Sun, 20-Sep-87 17:28:45 EDT
Article-I.D.: batcompu.2404
Posted: Sun Sep 20 17:28:45 1987
Date-Received: Sun, 20-Sep-87 23:36:25 EDT
References: <165@tut.cis.ohio-state.edu>
Reply-To: dyckman@tcgould.tn.cornell.edu (Howard L. Dyckman)
Organization: EE Dept., Cornell University, Ithaca NY 14853
Lines: 14
Keywords: disk, checker

In article <165@tut.cis.ohio-state.edu> neruda@tut.cis.ohio-state.edu (Steve Neruda) writes:
>I am looking for a disk checker that will write and read all the bits on some
>old disks.

The best I can suggest is to use CopyIIMac Sector Copy With Format to
copy a good disk onto the one you are testing.  Do it several times.  While
a bit-by-bit comparison of the result with the original is not done, I believe
it reads back the copy and tests checksums, and this should do the job.

Of course, the next time you format the disk, maybe it will write
the formatting bits is a slightly different place, and you might get a slightly
different result.

Does anyone know how disk mfrs check their disks?