I have never dealt with a massbus controller but have installed many
9762s on Emulex controllers. One thing that the device that DEC put into
the drive was to do with sector and index. The bog standard drive comes
with them on the A cable, but in order to have multiple drives you have
to move them on to the B cable, which is where the controllers look for
them. It is a tricky w/w job on the card cage backplane of the drive.
I no longer have the procedure.
IIRC the transfer rate is 9.6608 MHz - but I may be worng on that, it
has been a few years!
cheers,
Nigel
On 2024-07-25 07:02, Christopher Zach via cctalk wrote:
I have always heard that Dec screwed with the smd spec. Maybe not?
On July 25, 2024 12:41:57 PM GMT+02:00, Michael Thompson via
cctalk<cctalk@classiccmp.org> wrote:
The CDC test system for the RM03 is a standard SMD device. You disconnect the
Massbus interface and connect the test system where the Massbus interface was
connected. So the drive interface is probably standard SMD. The data transfer
of the 9762 is fairly high, so it may not work with slow controllers.
On Jul 25, 2024, at 5:59 AM, Christian Corti via cctalk<cctalk@classiccmp.org>
wrote:
Hello all,
we now have a RM03 drive, but are missing all the cables and the RH11
backplane, though I have the cards.
Since the drive itself is a CDC 9762 I was wondering if I could ignore the Massbus
adapter in the drive cabinet and use the CDC as a "normal" SMD drive (at least
it uses the standard 60+26 pin cables).
There are no service manuals/schematics of the drive itself, so I can't look
there. And all I could find on the net were discussions of using the Massbus
adapter for normal SMD drives but in my case, I don't want Massbus at all.
Christian
--
Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype: TILBURY2591
