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Article #17412Why is A/UX disk I/O only 50KB/sec?
From: James A. Woods
Date: Wed, 15 Jul 1987 21:50
Date: Wed, 15 Jul 1987 21:50
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During Phoenix USENIX, at the Unisoft booth, on the Mac II,
a "time cat /usr/dict/words > /dev/null" took about four seconds
of clock time. Staffers knew little about the disk or controller,
except that it was made by Qualogy.
Is the sluggishness due to:
(a) xfer rate of the disk (the Dataframe, for example is
spec'ed at just 5 Mbits/sec)?
(b) an underpowered controller?
(c) the Sys5-derived filesystem (BSD would do better)
(d) suboptimal interleave factors for above combination?
The informal comparison between the new Sony 68020-based machine
and the Mac II in the August Unix/World also hints at unbalanced I/O
on the Mac II.
Would disk performance under the default Mac OS be similar?
ames!jaw
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!seismo!ll-xn!ames!jaw From: jaw@ames.arpa (James A. Woods) Newsgroups: comp.sys.mac Subject: Why is A/UX disk I/O only 50KB/sec? Message-ID: <2363@ames.arpa> Date: Wed, 15-Jul-87 17:50:30 EDT Article-I.D.: ames.2363 Posted: Wed Jul 15 17:50:30 1987 Date-Received: Sat, 18-Jul-87 00:36:23 EDT Organization: NASA Ames Research Center, Moffett Field, CA Lines: 20