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From: iverson@xstor.com (Tim Iverson)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: SCSI slowness
Message-ID: <1991Apr02.214925.10627@xstor.com>
Date: 2 Apr 91 21:49:25 GMT
Article-I.D.: xstor.1991Apr02.214925.10627
References: <1991Mar25.161209.564@cunixf.cc.columbia.edu>
Organization: Storage Dimensions, Inc.
Lines: 22

In article <1991Mar25.161209.564@cunixf.cc.columbia.edu> liggio@cunixf.cc.columbia.edu writes:
>I have a Quantum ProDrive 170S and an Adaptec 1522 controller (SCSI-2).
>Supposedly, I should be getting upwards of 2 MB/sec out of this
>combination, but when I use coretest (v 2.91), it tells me I am getting a
>mere 900 k/sec.  The ProDrive has a 64k cache built in on board.

This is perfectly normal.  The Quantum ProDrive 170S has a maximum sustained
transfer rate of about 900KB/s.  The burst rate can be much higher than that,
but 900 is the best you'll ever get out of CoreTest.

The 170S is actually just your average, every-day, middle of the road,
mass-market drive.  If you really want *fast* you should think about
Imprimis' Elite (4-5MB/s) or Wren VII or Wren Runner (2-3MB/s).  Of course,
*fast* implies *bucks* :-).

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- Tim Iverson
  iverson@xstor.com -/- uunet!xstor!iverson