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From: drg@mdaali.cancer.utexas.edu (David Gutierrez)
Newsgroups: comp.sys.mac.hardware
Subject: Re: How to set SCSI ID on Quantum Q250?
Message-ID: <4610@lib.tmc.edu>
Date: 29 Jan 91 17:41:24 GMT
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References:<1183@duteca2.UUCP> <1991Jan28.192658.8779@eng.umd.edu>

In article <1991Jan28.192658.8779@eng.umd.edu> russotto@eng.umd.edu 
(Matthew T. Russotto) writes:
> In article <1183@duteca2.UUCP> thomas@duteca.et.tudelft.nl (Thomas 
Okken) writes:
> >
> >I just got a 210M HD for my Mac II and used it to replace the original,
> >Apple-supplied Quantum Q250 43M 5.25" hard disk. I'd like to mount
> >the Quantum in an external case, but I need to be able to change its 
SCSI
> >ID, which is now 0, so it will not conflict with the internal drive.
> >I can't find any switches or such on the controller, but there is one
> >unused 16-pin connector (male, rectangular, 2 rows of 8 pins each).
> >Anyone know how this is done?
> 
> It's not the 16 pin connector, I don't think.  I recall an 8 pin jumper 
block
> on the bottom of the drive.  I'm sure that the jumper positions are on 
the
> bottom of the drive, and marked 'A0' 'A1' and 'A2'.  You install jumpers 
to
> change the ID number.

You are 100% correct, Matthew. I've just done this on a Quantum Q280 
removed from a Mac II. I didn't use jumpers, though. The enclosure I 
purchased from MacTel for the drive (see my other posting today on this 
subject) had a pair of connectors that I placed over the pins to make them 
work with a SCSI selection switch on the outside of the case. These 
connectors protruded a bit from the drive, but the kit also included 
spacers to raise the drive in the enclosure enough to make it work.

David Gutierrez
drg@mdaali.cancer.utexas.edu

"Only fools are positive." - Moe Howard