Western Digital WD 1002S-SHD card ??? - test-drb@ccmp.vtda.org

14 Feb 2000

In a message dated 2/15/00 00:26:40 Central Standard Time, donm(a)cts.com 
writes:

...
  > 
  > <  I visited a surplus dealer today and picked up an external hard drive
  > <case that he was throwing out. The case has a Seagate 225 drive in it 
with
...
   > <some kind of Western Digital interface card.
The card has MFM  connection 
...
  o
  > <one end and a 50 pin header on the other. The header is connected to a
  > <cable that had a SCSI type plug on it. Does anyone know if the card is a
  > <SCSI to MFM interface or what?
  > 
  > Well St225 is MFM so the card is either a host to MFM bridge or  SCSI(SASI)
...
   to MFM
bridge.

 The real answer is a part number on the card like WD1002-HDO (host   interface 
  > number).  Someone else may be able to confrm if the SHD is SASI or at  that 
...

  time early SCSI.    
  TheRef45A says that it is SASI to ST-412.  

                        - don

Most of the early Heath/Zenith Hard Drive set ups manufactured by after 
market suppliers used the XEBEC controllers on the hard drives and interfaced 
to an SCSI card in the computer.  The 50 pin female header connected to a 50 
pin male header on the SCSI card in my H-89's.  There were other schemes, one 
involving a Western Digital PC controller mounted on the ST-225 and an 
interface decoder card on the left buss in the H-89.  I would bet that the HD 
described was interfaced to an SCSI card though.

Just my .02 worth.  YMMV

Mike