At 08:52 -0400 2002/10/01, Janice Best wrote:
>Also, I think part of the problem with the drive(s) is that I can't figure out where 
>the jumpers go.  The original drive is a made-for-Apple IBM drive, and the pins are 
>on the underneath of the drive.  It had jumpers on the 2nd and 3rd pins from the 
>right - which means, I would assume, that the ID wasn't set at "0."

 The jumpers on the 2nd and 3rd pins from the right may not have been affecting the 
SCSI address at all. They could have been on TE=termination enable and PK=Park. I 
think the latter means "rest an unused jumper here", but I'm not sure. There are other 
possible uses for jumpers that I don't remember.

Usually, one can -- with good vision, good light, and maybe a magnifier (;->) -- see 
A0, A1, and A2 next to the address jumpers.

Also, if you can get the system to boot, perhaps from a CD-ROM, with one hard drive 
connected to either the internal or external SCSI bus, check the SCSI ID on that drive 
by doing a get info on its desktop icon. If you determine that both drives have the 
same SCSI ID (probably 0), or that either one has the same SCSI ID as the CD-ROM 
(probably 3), make sure you've managed to change one of them so that all drives, 
including the CD-ROM, have different SCSI addresses before you put them together on 
the same SCSI bus.

BTW, if  you put the original hard disk back where it was so you should, at least, 
have no termination problem. Then see if you can boot from a bootable CD, if you have 
one.

 - Aaron

P.S. I -- or someone else on the list -- could probably sell you another 7500 
motherboard for a lot less than one of those ripoff companies would charge to fix the 
one you have.

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