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Date:      Sat, 29 Apr 1995 13:46:00 -0400 (EDT)
From:      Mark Hittinger <bugs@ns1.win.net>
To:        hackers@FreeBSD.org
Subject:   multi-pci scsi controllers
Message-ID:  <199504291746.NAA27122@ns1.win.net>

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I read Jordan's note about building a large server with PC hardware
with keen attention.  We are doing the same here.

I'm interested in the issue of using multiple PCI scsi controllers for
disks.  On my main server I've got enough disk that I'm starting to
think that I do have some controller contention.  

How much does a 2940 or bt946c burden a PCI bus?  I'm sure that the
walnut creek guys already know these details.  I have a handfull of
these controllers and I could experiment with spreading some load
around.

Any caveats with multiple 2940's that we should be aware of?  Could
we mix and match 2940/bt946c in the same box without bios contention?

PS: we got the Kentucky Derby home page business on our main server so
the Derby home page is on FreeBSD!  http://www.win.net/derby   Lots of
hits - and the first saturday in may is coming.  I worked at another
horse racing database firm in my younger days - and derby eve the
machines were swamped with activity from all over the world.

We are getting enough news and web activity on the server to probably
justify two controllers at this point - if it would make a positive
difference.  I probably need to scare up some more RAM (as usual).

Regards,


Mark Hittinger
bugs@win.net



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