*BSD News Article 77542


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From: "Keith A. Tomkins" <ktomkins@cisco.com>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: SCSI card
Date: 5 Sep 1996 22:18:12 GMT
Organization: cisco.com
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I set up a system similar to what you want. I have an Asus p166 with:

		2 - 2 gig EIDE hard drives
		64 megs ram
		Adaptec 2940/UW SCSI card
		Phillips 8x SCSI cdrom
		#8 771 video card
		Sound Blaster AWE32

I originally had a Toshiba 8x IDE cdrom, but had no luck getting it to work
as either a slave or a master on either the primary or secondary drive. After
I got everything set up, I attached a Quantam Capella SCSI drive to my system
for benchmarking. I saw almost no difference between the SCSI and EIDE drive
perfomance numbers. The motherboard uses the Triton II chipset. I have been
told that this is the reason the EIDE performance is so good. This test was
run with no other users on the system. If you are only going to have a couple
of users on the system, then EIDE is far cheaper. If you anticipate a high
load on the system, then eventually the EIDE will drop to it's knees. The
SCSI system has a major advantage in that it places very little demand on the
processor for IO requests. If it's going to be a coupl user system, use the
EIDE. If you're going to have a lot of people on it or use it in an application
like a web server, then go SCSI.
	As far as the SCSI cards go, it depends on what you want to do with it.
If you are going to use it for a primary disk controller, then get the PCI
version. If you are just going to hang a tape drive off of it, then just get
an ISA controller.

Hope this helps
Keith
		
-- 
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