Automatic digest processor wrote in a message to Roy J. Tellason:

<...>

JM> The drive seems to work since, when I plug the thing in and turn it
JM> on the drive clearly spins up.

This drive is one of the early ones,  that you were supposed to "park" before
powering down.  No telling where the heads are resting now,  but I'd be rather
careful in handling the thing...    :-)

<...>

JG> 50-pin Centronics.  The two ports are for chaining external SCSI
JG> devices (you can chain up to seven).  At the very least you'll need
JG> both ports, because one will need a terminator if you do nothing
JG> else with it.

A lot of this sort of device has selectable termination built in,  enabled with
a switch or a jumper.

<...>

JM>sort of cable would I need for this thing? I'm guessing it would
JM>plug into JM>an LTP port on one end at the back of the computer. Is
JM>that correct?

Adp> Nope, you'd need a SCSI card like an AHA-1542CF.  They're spendy,
Adp> so not really usefull for a survpc.

Actually I do have two computers here that use such a box,  one being an
Osborne Executive,  and the other a Kaypro 4.  The Exec does indeed use the
printer/IEEE port,  which is a _smaller_ (24-pin?) version of the same type of
connector, the Kaypro uses an internal adapter that feeds the ribbon cable out
of the box. Both ran cp/m...

<...>

AJA> Have a look at the drive.  If it is actually an ST-225N, then it
AJA> is a SCSI version of the drive.  If it's an ST-225 or ST-225R,
AJA> then it's an MFM or RLL version of the drive, respectively.  All
AJA> three versions had the same mechanics and platters, but different
AJA> circuit boards - this was very common for Seagate.

If it's not the SCSI version of the drive,  there will be an adapter/controller
between the drive and the cable.

<...>

JM>it's made by "Warp Nine Engineering" in Roseville, MN.

AJA> Probably the manufacturer of the sheet metal box, perhaps the
AJA> assembler of the unit.

The ones I have are made by "Design One" and "Trantor/Westwind" (who is still
around,  I think).

<...>

While we're on this subject,  I have a couple of external cdrom drives here
that use the same style of connector.  The only problem is,  they each only
have _one_ connector on the box!  What I'd need,  to be able to use both,  is
some sort of a Y-adapter,  and my luck in finding such a beast hasn't been too
good so far.  Anybody ever seen one of these?

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