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From: bcrwhims@undergrad.math.uwaterloo.ca (Carsten Whimster)
Subject: Re: SCSI - throughput
Message-ID: <DFF114.2n2@undergrad.math.uwaterloo.ca>
Sender: news@undergrad.math.uwaterloo.ca (news spool owner)
Date: Sun, 24 Sep 1995 15:15:04 GMT
References: <43bufs$ekb@nx2.hrz.uni-dortmund.de> <1995Sep21.090850.12239@wavehh.hanse.de> <DFBBvL.4tJ@undergrad.math.uwaterloo.ca> <MICHAELV.95Sep23000036@mindbender.headcandy.com>
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In article <MICHAELV.95Sep23000036@mindbender.headcandy.com>,
Michael L. VanLoon <michaelv@MindBender.HeadCandy.com> wrote:
| In article <DFBBvL.4tJ@undergrad.math.uwaterloo.ca> bcrwhims@undergrad.math.uwaterloo.ca (Carsten Whimster) writes:
|
| Also, what are some decent cached SCSI cards? I have an old VLB
| Promise IDE 4Mb cached controller, and I want to exceed the
| performance of this piece before I buy.
|
| You don't want a caching card. You'll just be spending your money on
| nothing useful. The caching in a BSD unix is much more sophisticated
| and highly effective already. If you couple that with a decent fully
| bus-mastering SCSI card, you should have the ideal setup.
|
| Caching controllers are of questionable value even in DOS systems
| (software caching is reported to be just as fast, and significantly
| cheaper). A modern unix works even better, because it can reallocate
| memory pages intelligently and pretty much nullify the effects of the
| hardware cache on the card.
For whatever reason, it does work well on OS/2, though. I had it in,
and got very nice performance. I recently had to take it out due to a
conflict, and I am now using the EIDE on my motherboard, and it is
_noticeably_ slower doing certain things. For this reason I presumed
that it is a good thing :)
--
Carsten Whimster bcrwhims@uwaterloo.ca
EDM/2 Associate Editor and Book reviewer
Team OS/2 POV-Panel/2 author
http://www.undergrad.math.uwaterloo.ca/~bcrwhims/