[ Sorry for the delayed replies... I've had a very hard time keeping
  up with the influx of mail I've been getting recently.  --thorpej ]

[ again, taken netbsd-help of the CC -- thorpej ]

On Fri, 6 Dec 1996 16:40:06 +0100 (MET) 
 Andreas Brusinsky <brusinsk@ibdr.inf.tu-dresden.de> wrote:

 > I dont't know much about SCSI and its terminators and
 > have also a configuration in which I can not see just with
 > a straight view where I have to place resistors.
 > 
 > I wanted to place the Quantum drive into the case of my hp 9000/400
 > apollo computer to save some space. There are inside of the 
 > Apollo two say racks or places for not-too-big disks and also
 > two internal scsi connectors on the motherboard.
 > I bought a 3-devices flat internal scsi cable and the drive
 > was connected.
 > 
 > I dont know what to do with the endings of the calble or something like that.
 > I do also have connected 3 external scsi-drives in a hp-box which has an
 > external terminator in the second interface. They work fine.

Sounds most definitely like you're experiencing a termination problem.
You really need to place resistor packs on the last drive in the
internal chain.  This is drive-specific; see your disk's manual for
more information.

 > On the Quantum are directly behind the interface 24 small holes.
 > Maybe they are for a terminator resistor but they are empty.
 > There are also some jupers on the Quantum.

Yes, those are for the resistor packs.  Quantum's WWW site or BBS
should be able to tell you what kind of resistor packs you need
for the drive.  Sorry, I don't have that information at hand...

Ok, so look at:

	http://www.quantum.com/support/

Looks like there's some data available there.  Phone numbers are:

	Tech support		+1 800 826 8022
	Faxback			+1 800 434 7532
	BBS			+1 800 472 9799
	European Tech support	+44 1344 353507
	European Faxback	+44 1344 353510

The "disk archive" has information on the PD 425/425i, at least.

 > 	Maybe you can point me at an SCSI introduction point
 > 	and/or provide me with more Info about the Quantum PD425S.
 > 	
 > 	Thanks anyway 
 > 	Bye by Brusi
 > 
 > 

Jason R. Thorpe                                       thorpej@nas.nasa.gov
NASA Ames Research Center                               Home: 408.866.1912
NAS: M/S 258-6                                          Work: 415.604.0935
Moffett Field, CA 94035                                Pager: 415.428.6939