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From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: Re:  optical drives on Apollos
Message-ID: <9102041445.AA23435@richter.mit.edu>
Date: 4 Feb 91 14:45:30 GMT
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We have several of the Sony SMO-S501 optical drives running on DN2500's.
They have about 315 MB per side using 1024-byte/sector platters or about
285 MB per side using the 512-byte/sector platters. The drives have a slow,
 seek time of roughly 90 msec. This seems to cause intermittant "object not
found" errors, especially when the mount point is not located on the local
disk of the DN2500 *and* the remote machine where the mount point is located
is a slower machine (like a DSP90). We are running two DN2500's diskless
with the Sony drives. They are ok as long as the mount points are on their
DN3500 partner. They get the intermittant drop out problem when mounted on
slower machines, especially on SR9.7 machines. We have one DN2500 with a
local disk (a Quantum 170S which we installed ourselves) and the Sony drive
which seems to run just fine.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter.mit.edu@eddie.mit.edu
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