🚀 go-pugleaf

In article <3vr18m$8vn@galileo.csun.edu>, swalton@galileo.csun.edu (Stephen Walton) writes:
> 
> I just removed an HP C2247 (1 GB single-end SCSI) disk from a 9000/735
> and moved it to a PC (replaced the C2247 with a Seagate ST32430N).  We
> didn't have a manual for the C2247, but I was able to identify the
> SCSI ID jumpers and change them from 5 to 0.  Now, however, I'm having
> intermittent problems with the disk when it is in the PC, SCSI timeout
> errors when installing Linux for example.  The most recent problem is
> when I upgraded the BIOS on our PC SCSI host adapter, an IN-2000,
> which fails to see any SCSI devices with the new BIOS but works fine
> with the old one.  The manufacturer of the IN-2000 tells me that this
> new BIOS pushes the adapter pretty hard and will fail if anything is
> marginal.
> 
> I'm wondering what the other jumpers do, if changing them might help.
> In particular, I'm assuming the C2247 is unterminated since it was in
> the middle of the bus in the 735 and there is an empty socket (two
> rows of holes) on the back of the disk.  This is OK, as the PC has a
> SCSI tape drive in it with termination.  If this is wrong, or if there
> is anything else I can try, I'd like to know.
> -- 
> Stephen Walton, California State University, Northridge
> "Be careful what you wish for;  you might get it."	swalton@csun.edu

Hang on to your hardware cause here we go......
J2 - pin 1&2 open - SCSI-2 mode
     pin 1&2 closed - SCSI-1 mode
     pin 3&4 open - TERMPWR supplied by drive
     pin 3&4 closed - TERMPWR supplied by drive to pin 26

J3 - 1 open - write protect disabled
     1 closed - Write prot enab.
     2 open - unit attention enabled
     2 closed - unit att. dis.
     3 open - SDTR message initiated at power up
     3 closed - SDTR message disabled
     4 open - parity enabled
     4 closed - par. dis.
     5 open - motor start on power up
     5 closed - motor start on command
     7 closed, 8 open - pin 29 connected to ground
     7 open, 8 closed - spindle sync signal routed to pin 29

J6 - 1&2 not used
     3&4 open - Termination enabled
     3&4 closed - Term. dis.

Whew, there are a lot of the little devils, ain't there?

Hope this helps you out.

-- 


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