[SunRescue] Sun 4/670 problems

[Michael Graziano]

"Michael S. Schiller" wrote:
> 
> Michael:
> 
> I don't remember what your original problem was, but if it was getting the
> internal scsi tray working on a 670, I found out something really
> interesting the other day. When you open up the separate SCSI 'drawer' you
> will find a circuit board with 2 SCSI connectors on it, and 4 power
> connectors. Well, I know that the SCSI has to be a loop going from one
> connector to whatever drives are in the box, then back to the other
> connector. Well, I did this using a generic SCSI cable I had here, and no
> go, the SCSI stuff didn't work at all. After careful examination of the
> board inside I discovered that the connectors key (the slot in the
> connector) is wrong! You need a special cable with the 2 outside
> connectors reversed from the rest of them for the SCSI stuff to work
> properly. All I did was grind off the key on the cable, reverse it, and
> now everything works wonderfully! I hope this info helps.

I noticed that little oddity when I was disassembling the 670 - Sun got
around it by not using keyed cables (at least in my box), and with some
"creative" folds in the stock cable.
I will probably be replacing these with cables that will support more
than two drives per tray, so I will undoubtedly need to grind off keys
on
cables myself :)

> 
> -Mike
>