On Oct 6, 21:34, Don Maslin wrote:
> On Sun, 6 Oct 2002, John Lawson wrote:
> > It boots from two Micropolis 51/4" half-height drives sitting in the
> > card bay of a card-less 11/23 chassis... which has been re-badged by
> > Centaur Software. The front panel switches control write-protect, now.
> > I don't have models right now, since I didn't work on that device yet.
> > But they connect to a Dilog DU686 controller card - a quad-height card
> > with one common 34-pin ribbon and individual 20-pin ribbons going to
each
> > (of 2 drives). This is... MFM, no? the original owner called them
SCSI
> > but somehow I think not.... Anybody have Doc on this Dilog card?
>
> Certainly not SCSI, but are either ST506/411 (what you called MFM) or
> ESDI. Check the controller capabilities or the interface of the drives
> before you swap in a different drive that "looks the same". The
> connectioons are NOT the same.
DQ686 is an ESDI controller, with MSCP protocol. Don's right, do not
connect ST506/412 drives to it or you'll release soe magic smoke!
--
Pete Peter Turnbull
Network Manager
University of York
Received on Mon Oct 07 2002 - 02:25:00 BST