Hi
There were very few replies to this query (original below), and
consequently it turned out to be a hardware problem.  The new firmware
seams to have exercised new and faulty parts of the mother board.
After installing a new mother board the new firmware and DU 4.0A
appear to be working fine.
original query:
> we have just installed (i.e. complete install, not upgrade) a DEC
> 255/233 with DU4.0A, and firmware updated to 3.7.  The system now
> crashes regularly particularly with lots of disk activity (i.e. rdist,
> backups etc., so usually more than three times a day).  DEC support
> suggest moving down to firmware 3.6, but are not sure if this will
> work.  Has anyone experienced such problems, and/or could suggest
> possible solutions?
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Andrew Gillies                 e-mail  A.Gillies_at_cns.ed.ac.uk
Centre for Cognitive Science           A.Gillies_at_cogsci.ed.ac.uk
2 Buccleuch Place              phone   +44 (0)131 650 4408 
Edinburgh EH8 9LW              fax     +44 (0)131 650 6626
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Received on Tue Dec 10 1996 - 11:07:50 NZDT