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From: larry@nstar.UUCP (Larry Snyder)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Perstor comments wanted.
Summary: SCSI driver
Message-ID: <511254@nstar.UUCP>
Date: 6 Mar 90 01:27:11 GMT
References: <9027@ingr.com> <6991@tekgvs.LABS.TEK.COM>
Organization: Northern Star, Notre Dame, IN USA
Lines: 21

In article <6991@tekgvs.LABS.TEK.COM>, keithe@tekgvs.LABS.TEK.COM (Keith Ericson) writes:
> 
> We prefer SCSI: a 15 Mbit/sec drive will usually turn in a CORE27 timing of
> about 1.4 megabytes/sec transfer rate.  The 15 Mbit/sec ESDI do essentially
> the same.  (This with Adaptec controllers: 1542A for SCSI; 2322B-8 for ESDI.
> The only WD adapter I've tried was an EDSI that I _think_ wasn't rated for
> 15Mbit/sec, so the results aren't valid...)


Core test is a bad benchmark with SCSI drives due to the embedded buffing
on the drive.  The only true way to bench SCSI devices is by timing the
transfer of large blocks of data.

I also use a 1542A with a Miniscribe 9380S SCSI drive.  The drive is rather
slow - but throughput runs at 1.2 megabytes/sec under 386/ix.


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