Subject: Re: Need SCSI help...
To: Capt. Avram Dorfman <dorfman@pentagon.mil>
From: Dr. Bill Studenmund <wrstuden@loki.stanford.edu>
List: port-mac68k
Date: 08/16/1998 18:50:56
On Sun, 16 Aug 1998, Capt. Avram Dorfman wrote:

> Hello,
> 
> I just bought a used SCSI drive, and I'm trying to get it to work w/ an
> SE/30 running NetBSD (although I haven't gotten to the NetBSD party yet
> since it won't recognize the drive...) It's a 2GB Seagate Hawk XL2.
> According to Seagate, the interface type is Ultra-SCSI ASA 2. 
> 
> What I'd like to know is, *should* this work? Should an SE/30 be able to
> use this? My PowerMac has no trouble with it, and my Q660av can use it,
> but I get wierd video stuff going on (garbage in my menu bar & windows not
> drawing their contents) when I replace the built-in CD w/ it in my SCSI
> chain (yes, I have unique SCSI IDs). The only difference other than the 
> type of mac between the SE/30 and the other two is that in the SE/30 it's 
> the only device in the SCSI chain, whereas in the other two, it's in the 
> middle between two other devices. 
> 
> It has embedded resistors that are controlled by jumpers, so I set 
> termination to "on" and "powered from drive" when in the SE/30, and "off" 
> in the other two.

That might be part of the problem. I've had no end of problems with active
termination. You might see if you can just get some passive terminating
resistors at the end of the SCSI chain, and turn off the active
termination.

Take care,

Bill