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From: smc8516@isc.rit.edu (S.M. Curtin)
Newsgroups: comp.sys.amiga.hardware
Subject: Hooking up a Hard drive (Post 2 'cause our server is flakey)
Message-ID: <1991Jan16.221154.14281@isc.rit.edu>
Date: 16 Jan 91 22:11:54 GMT
Reply-To: smc8516@ultb.rit.edu (S.M. Curtin)
Organization: Rochester Institute of Technology
Lines: 35


A friend of mine recently got an old Xetec hard drive system for the 64
or 128 and wants to hook it up to his 3000. Apparently, some sort of
SCSI converter plugged into the 64 and went to the HD box via a 25 pin
cable and was switched internally to a 50 pin standard SCSI ribbon. It
then goes through an Omti SCSI to ST-506 converter board and into a
standard 40 meg st-506 style drive. The unit also has its own power
supply.

We've bypassed the external 25 pin connector on the back of the Xetec
box and gone straignt to the 50 pin internal. (The 25 pin was VERY
nonstandard). I ended up making a special cable to go from the 25 pin
external SCSI connector on his 3000 to a 50 pin header female. (Pressing
each wire into the crimp things individually, I might add). We're sure
the pin assignments are right and the contacts are good in the cable as
we checked it thoroughly.

The problem is we have no documentation on how to set the Omti board. It
has about 10 or 12 jumpers down one side of it, and one 3 pin jumper
(dual shorting block position) right next to where the 50 pin connects.
We need to know what to set these jumpers for to get it working with the
3000. I assume the row of 10 or 12 is for SCSI device# select, though I
thought only 7 devices were available in SCSI systems. What are the
extras for?

We have all of the specs on the drive to enter into HdToolbox.
(Cylinders, write precomp, heads, etc) Is there anything else we need to
do?

...Sean.


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