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Posting-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!henry
From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: hacknews
Subject: disk follies continue 
Message-ID: <2994@utzoo.UUCP>
Date: Fri, 27-May-83 16:15:27 EDT
Article-I.D.:    utzoo.2994
Posted: Fri May 27 16:15:27 1983
Date-Received: Fri, 27-May-83 16:15:27 EDT
Organization: U of Toronto Zoology
Lines: 15

Based on tests run yesterday, it now appears that the source of our
long-standing problems with the old drive may well have been the
pack(s) rather than the drive.  Our old Memorex packs seem to be in
lousy shape, with a strong suspicion of servo-surface damage.  The
standalone drive diagnostics run just fine on the old drive using
one of Terabit's Dysan scratch packs, but they really choke on one
(either one) of our old packs.

The only serious test left to be run is to try moving our current
production pack (the new Dysan) to the old drive.  If we run on this
for a while with no problem, QED.  We'd tentatively planned to do
this sort of thing anyway, to assess whether all the old drive's
problems had been fixed.  Pack switch (and the minor bit of cable
shuffling to make the old drive drive #0 again) will probably be
done during Monday backups.