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From: michaelv@MindBender.HeadCandy.com (Michael L. VanLoon)
Newsgroups: comp.os.386bsd.questions
Subject: Re: SCSI controller recomendations requested
Date: 15 Sep 1994 04:58:43 GMT
Organization: HeadCandy Associates... Sweets for the lobes.
Lines: 30
Distribution: world
Message-ID: <MICHAELV.94Sep14235846@MindBender.HeadCandy.com>
References: <Cw3nuw.E8@galaxia.network23.com>
<MICHAELV.94Sep14134212@MindBender.HeadCandy.com>
<3580n8$3t@schema.fiu.edu>
NNTP-Posting-Host: stingray.cc.iastate.edu
In-reply-to: DWHITE01@SERVAX.FIU.EDU's message of 14 Sep 1994 23:24:24 GMT
In article <3580n8$3t@schema.fiu.edu> DWHITE01@SERVAX.FIU.EDU (Don Whiteside) writes:
In <MICHAELV.94Sep14134212@MindBender.HeadCandy.com> michaelv@MindBender.HeadCandy.com writes:
> Adaptec 1542CF (ISA)
>
> Slow. Buying it supports Adaptec's fascist support policies with your
> own dollars. Limited to 16MB of memory on some systems, and even on
> newer systems, will be slower above 16MB. The ISA bus is 16-bits wide
> and runs at 8MHz.
Sigh. I was thinkning about buying a 1542CF, but was having some misgivings
about the benifits of a bus master card, considering my 20 meg of memory and
an ISA bus. Can someone say conclusively what level of benifit I'll get
from, say, a 1542 over a 1522?
I'm not sure why you'd have misgivings. As slow as the 1542 would be,
the 1522 would be even slower (in overall system performance). At
least the machine can be doing other things while the 1542 takes its
time getting stuff in and out of memory, but with the 1522, the CPU is
all tied up in the actual transfer of every byte of disk data, as
well.
--
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Michael L. VanLoon michaelv@HeadCandy.com michaelv@iastate.edu
Free your mind and your machine -- NetBSD free un*x for PC/Mac/Amiga/etc.
Working NetBSD ports: 386+PC, Mac, Amiga, HP300, Sun3, Sun4c, PC532
In progress: DEC pmax (MIPS R2k/3k), VAX, Sun4m
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