Subject: UW SCSI controllers that are SRM compatible
To: None <port-alpha@NetBSD.ORG>
From: None <nick.maniscalco@alfalaval.com>
List: port-alpha
Date: 07/01/1998 15:53:18
I appoligize in advance if this is obvious or has recently been=20
discussed=2E
=20
I have an axppci33 and I have been using the onboard ncr53c810 for=20
quite a while but I now have a wide disk and the 810 is only fast=20
narrow :(
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I have quite a few adaptec controller (2940 and 3940's u and uw's) but=
=20
it seems that SRM (and DEC Unix) do not support these adaptec=20
controllers (too bad because I have more than one sitting idle :(
=20
Anyway, I am looking for an inexpensive pci controller that supports=20
ultra wide devices and is supported by the axppci33's SRM (so you can=20
boot directly from srm without having to boot the kernel off of a=20
floppy etc)
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I would also like this controller to be compatible with DEC Unix is=20
possible=2E
=20
It looks like my options would be something in the range of a 53c875?=20=
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this is a uw controller and is supported by dec unix, netbsd and srm I=
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believe=2E
=20
I have been having trouble finding a controler to fit my needs=2E If=20
anyone knows of any such controlers and vendors I would appreciate=20
hearing about them=2E
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The new hard disk that is causing these problems for me is a full=20
height 5=2E25" 9 gig 5400 rpm fast wide disk=2E I have thought about=20=
just=20
buying a cable adapter so that I can use this wide (68 pin) disk on a=20
narrow (50 pin) chain=2E This would solve the problem but would I be=20
sacrificing much performance?
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Does wide vs=2E narrow make much of a difference if the disk is only=20
fast (not ultra) and the bus is pretty traffic free?
=20
Thanks
Nick