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From: dag@gorgon.uucp (Daniel A. Glasser)
Newsgroups: comp.periphs.scsi
Subject: CDC 100meg 1/2 Hgt drive -- Request for info
Message-ID: <1990Sep25.031132.5659@gorgon.uucp>
Date: 25 Sep 90 03:11:32 GMT
Sender: dag@gorgon.uucp (Daniel A. Glasser)
Organization: Perseus Reductions (Medusa Division)
Lines: 79

I am in need of some information on a SCSI drive that I purchased at
a swap meet recently.  I don't know if it works or not...  I cannot
get it to spin up, but maybe I need to set some things up with this
drive before it will spin up.  The seller told me it was a 100 Mb
drive.

It is a CDC Half-height SCSI drive marked with the following information
on the label:

	MN:	94221-101
	PN:	77748218

The front of the drive has a 14 contact tongue for a card-edge type
connector on the right side, a 2 pin header next to that, and a small
LED near the left side.  I suspect that the LED is the drive activity LED,
and the 2-pin header for a "remote" activity LED, but the connection on
the right side has me baffled.  Also, there is evidence that something
was on that connector at one time.  (Scratches in the plating.)

  [------------------------------]
  [       ######                 ]  Front View
  [    ############    ..        ]
  [__@_############______________]
  [====================== =======]
     ^---LED     2-pin--^     ^-------14 finger (7 on each side) card edge

On the Circuit board side of the drive there is a rectangular hole with
three strips of 8-pin single in-line sockets right behind the power
connector.

		Circuit board view

          +======================================+
   7 ---> [                                      |
fingered  [_                                     |<-- SCSI connection
(times 2) +-|                                    |
card      |        (*)                           |
edge      |                    ---               |<-- Horizontal 8 pin header
          |                  (  *  )             |
F         |                    ---               |<-- 4 2-pin headers
r         |                            +-----+   |
o         |                            |     |   |<-- Power
n         |                            +-----+   |
t         +======================================+

The back of the drive has a circuit board, a 50 pin SCSI connection,
an 8-pin horizontal line of pins next to four two-high pin headers, and
the power connector.

   [--+-----------------------------------------+--]
   [  |                                         |  ]
   [  |     Little Circuit Board                |  ]
   [  |                                         |  ]    Rear View
   [  +-----------------------------------------+  ]
   [ :::::::::::::::::::::::::  ........ :::: #### ]
   [-----------------------------------------------]<-------Main circuit board
     SCSI connection ---^       ^ -8-pin  ^-4  ^-----Power
                                         2-pin

The drive came with no docs, no jumpers installed on any of the headers,
and no terminating resistor pack.

I would appreciate any and all information about this drive.  My site
does not get comp.periphs.scsi (except when cross-posted to something
it does get) so follow-ups will probably not get here.  If you have
some information about this drive, please send me E-mail at one of
the two addresses below.

	dag@persoft.com  (spool.cs.wisc.edu!persoft!dag)
	or uwvax!persoft!gorgon!dag

I will forward a summary via E-mail to anyone who requests one (via E-mail)
if I get any information.
				Thanks in advance --

					Daniel A. Glasser
-- 
Daniel A. Glasser                       One of those things that goes
dag%gorgon@persoft.com                  "BUMP! (ouch!)" in the night.