On 10/16/05, Pete Turnbull <pete at dunnington.plus.com> wrote:
RL01 and RL02 cables have those funny connectors at
both ends.
Drive-to-drive cables certainly all do, and _most_ interface-to-drive
cables do, but some do not.
In particular, I have seen a 40-pin-Berg-to-RL-drive cable (no ribbon
cable whatsoever)
in two situations; with an RLV12 in a MicroVAX-II, and my own RL8A.
As long as I
have had the controllers, I've had these two round cables that are
about 2m long with
one connector for the controller and one for the drive (no transition
brackets, no anything
between the controller and the first drive. I have never checked them
to see if they are wired the same or not, but I wouldn't expect that
they are (or if they are different that the difference amount to
much). Of course, the printsets will be the best way to prove what an
RL8A-to-drive cable needs to look like.
It sounds like you haven't got the ribbon cable
for the interface end
either; that would be a short 40-way ribbon with a Berg connector on
each end with one of the opposite-gender funny RL0x connectors plugged
into one of the Bergs.
The rig I think you are describing was typical of the RL11, for example, with
a 40-pin ribbon cable to a black connector mounted in a mountable metal frame
that accepted a drive-to-drive cable. That black transition connector, BTW, is
identical to the transition connectors on the back of the disk drive
units. Worst
case, you can steal/borrow one from a scrap drive.
I've never seen those connectors elsewhere, but on
the inside of the
drive, they're 40-pin headers like a Berg connector, so you could, as a
last resort, use something else to get you going.
I have never tried it, but I suspect that one could rig up a ribbon cable from
the right board in the RL01/RL02 all the way to the controller. It would be
a bit annoying to change around the drive arrangement, but if you only have
one or two drives and they don't migrate, it might be a satisfactory setup to
wire the drive and controller together over a single cable with no breaks.
-ethan