Western Digital WD 1002S-SHD card ???

From: KB9VU_at_aol.com <(KB9VU_at_aol.com)>
Date: Tue Feb 15 07:02:48 2000

In a message dated 2/15/00 00:26:40 Central Standard Time, donm_at_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
Received on Tue Feb 15 2000 - 07:02:48 GMT