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From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: Re:  Alternative OS's for dn4500
Message-ID: <9101241645.AA23413@richter.mit.edu>
Date: 24 Jan 91 16:45:50 GMT
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Not having given any explanation of the symptoms, it's impossible
to give you any help. How slow? What are you trying to do at the
time? Is the system page-swapping at the time? How big is your
program? Is it larger than the 4MB of RAM you have?

The 150 MB ESDI disks used in the DN3xxx/4xxx are not particularly
slow as disks go. They are usually Micropolis 1355 drives. You
can upgrade to either a Maxtor EXT-4380 (350 MB formatted), a
Maxtor EXT-4380E (what HP/Apollo refers to as a 350FA [fast access]
drive), or a Micropolis 1558 (also used as the 350FA drive).
If you have the WD7000 multi-function controller, you can upgrade
to the Maxtor 8760 (695 MB formatted) drives.

The Maxtor EXT-4380E, Micropolis 1558, and Maxtor 8760 drives
are all faster than the Micropolis 1355, but unless you know
*why* your system is running slowly, replacing your disk
drive is like replacing your car's muffler because the
car doesn't go fast enough.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter.mit.edu@eddie.mit.edu
krowitz%richter.mit.edu@mitvma.bitnet
(in order of decreasing preference)