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From: michaelv@iastate.edu (Michael L. VanLoon)
Newsgroups: comp.os.386bsd.questions
Subject: Re: Support for AHA-2740/T SCSI
Date: 28 Jul 94 07:31:27 GMT
Organization: Iowa State University, Ames, Iowa
Lines: 48
Message-ID: <michaelv.775380687@ponderous.cc.iastate.edu>
References: <CstyJ0.5AC@on.bell.ca> <2vup9e$787@csugrad.cs.vt.edu> <30vg04$m2j@news.delphi.com> <CtHDMz.89s@tfs.com> <thompson-270794165017@144.37.1.111>
NNTP-Posting-Host: ponderous.cc.iastate.edu
In <thompson-270794165017@144.37.1.111> thompson@scripps.edu (mark thompson) writes:
>Do the comments on the Adaptek 2740 apply to the 1522? The local PC shops
>really want to sell me a 1522 and it sounds pretty cool and highly
>featureful.
>And yet, I see no mention in Unix terms...
The 1522 is probably the last card you would want to buy. It sounds
like they're trying to unload some goods on you.
The 1522 is a dumb (no bus-mastering) slow, outdated ISA bus card.
I've heard there are drivers that will make it work in NetBSD-1.0, but
I would only recommend them for someone who already has one of these
cards and can't afford something better.
You never said what kind of bus you want to plug it in to. If you
have a PCI or EISA bus, by all means USE IT! :-) Get a card
specifically for that bus because it will be much faster, and less
load on the system. If you don't have those, but have a VESA Local
Bus, get a card that uses that -- it'll be approximately eight times
faster than the ISA bus. If you don't have any of those and have to
settle for an ISA card, the 1542 is an ok (but slow) card to get. But
there are cheaper ISA cards.
I tell people to get BusLogic cards because I own one, and they work
very well, and BusLogic is a friend of free unix users since they're
very helpful and supportive. I would recommend not supporting Adaptec
for no other reason than they are quite hostile and deceptive about
their products to the free unix world. The BusLogic line stack up
like this (in order of preference):
bt946c PCI FAST SCSI-2 (10MB/s)
bt757s EISA FAST+WIDE SCSI-2 (20MB/s)
bt747s EISA FAST SCSI-2 (10MB/s)
bt74sa EISA SCSI-1 (5MB/s)
bt445s VLB FAST SCSI-2 (10MB/s)
bt545s ISA SCSI-1 (5MB/s) (this is similar to the aha1542c)
If you have a PCI bus, you might also check out the new PCI SCSI cards
based on the NCR 810 chip, which are supposed to be quite good.
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Michael L. VanLoon Iowa State University Computation Center
michaelv@iastate.edu Project Vincent Systems Staff
Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc.
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