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Stephen Walton (swalton@galileo.csun.edu) spoke thusly:

: I just removed an HP C2247 (1 GB single-end SCSI) disk from a 9000/735

<snip>

: 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.

HP does some weird stuff with jumpers - SDTR and whatnot. Best bet is yeah, 
it's one of those. WHich, though...?
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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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Stephen Walton (swalton@galileo.csun.edu) wrote:

First part deleted

: I'm wondering what the other jumpers do, if changing them might help.

Try http://hpdmlad.boi/diskinfo/jumpers/.listing.html

Tom Carney

In article <3vu5ml$ms9@hpindda.cup.hp.com>, Tom Carney <tomc@cup.hp.com> wrote:
>Stephen Walton (swalton@galileo.csun.edu) wrote:
>
>: [I was looking for jumper info on a C2247A HP drive just moved to a PClone.]

>Try http://hpdmlad.boi/diskinfo/jumpers/.listing.html

I wasn't able to access this URL even after changing the hostname to
hpdmlad.boi.hp.com.

However, Steve Messinger and Larry Copp of HP were kind enough to
reply by e-mail and tell me what the jumpers did.  In addition, Larry
correctly identified the problem as the SDTR jumper, pin pair 3
counting from the LED on the drive front, which is on when the drive
is in a 700 series machine but should be removed for almost all
others.

This gets rid of almost all problems.  I'm now trying to install Linux
on part of this drive, and creating the swap space with mkswap on the
swap partition fails with a SCSI timeout, but _only_ if the swap
partition is on the last few (highest numbered) cylinders of the
drive.  If I move the swap to right after the DOS partition (cylinders
700 to 720, roughly), mkswap works OK.  This has me eyeing the 'sync
spindle' jumpers.  I also note that Linux reports the drive as having
1001 cylinders, but the hpC2447_noswap disktab entry says it has 2075.
-- 
Stephen Walton, California State University, Northridge
"Be careful what you wish for;  you might get it."	swalton@csun.edu