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From: pnoguchi@helix.nih.gov (Philip Noguchi)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Wren Runner Drives
Message-ID: <1991Feb7.092417@helix.nih.gov>
Date: 7 Feb 91 14:24:17 GMT
References: <947@nih-csl.nih.gov>
Sender: news@nih-csl.nih.gov
Reply-To: pnoguchi@helix.nih.gov (Philip Noguchi)
Organization: National Institutes of Health
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Joe Murphy asks about WrenRunner drives. The 330 meg WrenRunner is a
Wren V type, with a maximum thruput of 1.5 megabytes per second on a
iici SCSI port. I believe that part of its speed comes from being a
short-stroke drive, ie it does not use the whole platter surface, but
only the fastest (outer?) portions. The nuport SCSI board from Micronet
does not speed up this drive, as the 1.5 meg/sec is its top speed. The
new Wrenrunner II 660 drive is twice as big, and uses a faster spindle,
I think 4400 rpm. When coupled with the Micronet Nuport, it will clock
at 3.0 megabytes per second, or twice as fast. The original wrenrunner
is fine, but older technology. For better thruput, the Wrenrunner II is
a clear winner when used with the Nuport. On a iici without a nuport,
Micronet has benchmarked the wrenrunner at 1.5 meg/sec, and the
wrenrunner II at 1.75 meg/sec.

Phil Noguchi