From owner-freebsd-hardware  Mon Apr 20 19:36:26 1998
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To: David Kelly <dkelly@hiwaay.net>
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Subject: Re: Narrow SCSI controllers, and using WIDE drives with them 
In-reply-to: Your message of "Mon, 20 Apr 1998 18:39:31 EST."
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Date: Tue, 21 Apr 1998 10:33:16 +0800
From: Stephen Hocking-Senior Programmer PGS Tensor Perth <shocking@prth.pgs.com>
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> Dan Strick writes:
> > It ought to work by default.  If not, you may be able to tell the
> > host adapter via its BIOS interface to only do narrow transfers
> > with specific SCSI devices.
> 
> That's sorta hard to do with a narrow controller as all I've seen are 
> not capable of wide negotiations therefore its not an option.
> 
> My 2940 (narrow with the 7860 chipset and BIOS 1.21) didn't like a wide 
> drive that was attached.
> 

Having started this debate, I'd like to say that I'm buying an Ultra-Wide 
controller (NCR-875) to go with the NCR-810 which has the narrow devices on 
it. I've been offered the use of an IBM 4.3GB UW drive from work. I have to 
boot out a PCI ethernet card, but as the box in question isn't going to be 
hooked up to a home 100Mbit network in the immediate future, it's not a 
problem. From what people have been saying, it seems like a lot of grief is 
involved in mxing wide & narrow devices on the same bus.


	Stephen


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