Re: Help with changing SCSI ID#

[david@wraith.cs.uow.edu.au (David E A Wilson)]

Robert Rivkin <rrivkin@umbc.edu> writes:
>The selector is on the bottom of the case, and it 
>consists of an inset turquoise square whose round 
>center is a "+" configuration of small 
>slots for a screwdriver surrounded by the numbers 0-9.

>Turning the "+" a notch at a time, then rebooting on 
>my RamFAST to verify the ID#, I got the address #7 on 
>all but one setting, where I was able to get #0 [the other 
># that won't work on the Apple HS :-(].

>I removed the drive from its case, checked for 
>tight connections to the selector, replaced the 
>drive, and tried again--same results.

>Is there any way to repair the selector?  change the ID# to 1-6?  


If you get 7 positions = ID 7 and one position = ID 0 then you probably have
the cable plugged into the drive the wrong way. Look at it this way:

	Drive connector			Switch
	A2 . . GND			*-/ -+
					     |
	A1 . . GND			*-/ -+
					     |
	A0 . . GND			*-/ -+

If you rotate the plug 180 degrees then you will short all address pins together
thus all you can get is 000 = 0 (when none of the connections are made) or
111 = 7 (when one or more connections are made). Try rotating the plug 180
degrees and re-inserting it.
-- 
David Wilson	Dept CompSci Uni Wollongong Australia	david@cs.uow.edu.au