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From: paul@gem.stack.urc.tue.nl (Paul Derks)
Newsgroups: comp.sys.hp
Subject: Is it possible to upgrade HP7958 disks?
Message-ID: <214@gem.stack.urc.tue.nl>
Date: 29 May 91 19:44:10 GMT
Sender: news@rc6.urc.tue.nl
Organization: Stack, Eindhoven University of Technology, The Netherlands
Lines: 22


We have a HP 9000/340 with two CS80 disks (HPIB interface),
one HP7985 and one HP7985B. This gives use around 300MB diskspace
which is getting a little cramped. (Did I say a little ? :-))
I opened up one of the disks recently and was pretty suprised to
find a standard Micropolis ESDI drive inside. Is it possible to
replace the disk with something a bit larger, say 680 MB?
The problems which could arise are:
Does the ESDI controller use the Request Configuration command
to read the capacity of the drive? (See Byte June 1990)
Does the ESDI controller in the HP7985 support 15Mbit/s
transfer rates ? (all drives above 330MB use this)
Do the media initialize utilities delivered with HP/UX 7.0
format another disk?

Thanks in advance

Paul Derks
paul@stack.urc.tue.nl
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