🚀 go-pugleaf

In article <Bwy3F8.6G@cs.uiuc.edu> mattox@cs.uiuc.edu (David Mattox) writes:


>>Hi, 

>>I have an HP 1350SE hard drive in an expansion box that I would like
>>to use with my DECstation 5000. I have talked with other people on the
>>net that who have done this sucessfully so I know it is possible.
>>However I am having problems. When I put the disk in the SCSI chain
>>the DS cannot find it at the console prompt using cnfg and it will not
>>boot if the disk is turned on. I have eliminated all the simple
>>problems (cables, dip-switch settings) and the disk works fine on a HP
>>(Apollo 433) machine. At this point I can only think of two possible
>>reasons for this.

>>First, the disk needs to be formatted for a DecStation. If that is the
>>case how do I format the disk if I can't get it attached to a device.
>>The second possibility is that the controller on my disk is different
>>than the ones on the disks that people had told me about earlier. If
>>so, does anyone know any good places to buy a new PROM to pop into the
>>disk controller? 

>>thanks in advance for any help, 

>>dave mattox
>>mattox@kbesrl.me.uiuc.edu

Dave,

  I don't know of any specific HP problems (they generally make pretty good
stuff) with SCSI disks. Although, I'm not familiar with the HP model number
you've mentioned.

  The only time I've seen something like this was with a Hitachi disk that
had what I would consider a firmware problem. IMHO. Basically, the ANSI SCSI-2
spec recommends a response time to a SCSI bus reset of 250ms. The ANSI SCSI-1
spec hadn't addressed that at all and when Hitachi migrated their drive over
to the new standard they didn't check the firmware out (it was responding at
somewhere around 670ms).

  The original firmware for the DS5000/200 would wait 240ms and then reset the
timer to wait another 240ms after a SCSI bus reset before it would assume that
a device was MIA (Missing In Action). You might want to check and see if this
is what's supported in the HP firmware (you could call their tech support folks
about it).

  If you're feeling adventerous, there is a file I had put up on gatekeeper to
address this. You can find it in:

gatekeeper:	16.1.0.2	gatekeeper:pub/DEC/TriAdd/README_scsi.hex
							  scsi.hex


Some folks have made their own SCSI PROMs for the DS5000/200 from here without
problems (I can't claim that this is a supported practice, it just happens to
be the revision of code in the new PROM for the PMAZ-AB SCSI Host Adapter).


  Of course, if that doesn't happen to be the problem and the HP folks are not
sure what's wrong, you can always have the folks at HP give us a call here at
TRI/ADD. We'd be happy to help.

I hope that helps.


				Thanx,
				  AJ


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