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From: iwm@icdoc.UUCP (Ian Moor)
Newsgroups: net.arch
Subject: Re: Inertia in machines
Message-ID: <233@ivax.icdoc.UUCP>
Date: Thu, 15-Aug-85 18:31:04 EDT
Article-I.D.: ivax.233
Posted: Thu Aug 15 18:31:04 1985
Date-Received: Tue, 20-Aug-85 06:29:21 EDT
References: <2264@amdcad.UUCP> <> <1601@amd.UUCP>
Reply-To: iwm@icdoc.UUCP (Ian Moor)
Organization: Dept. of Computing, Imperial College, London, UK.
Lines: 15
Xpath: icdoc ivax




One of the people who worked on the MU5 at Manchester told me that 
the "find first bit set" instruction which worked on a bit vector
sometimes overshot if there was a long set of 0's, trouble was that
the disk block allocation was done with 1's to mark free blocks, on
a full disk somebody's block might just vanish.

-- 
Ian W Moor
                                   The squire on the hippopotamus is equal
 Department of Computing           to the sons of the other two squires.
 Imperial College.
 180 Queensgate 
 London SW7 Uk.