Ethan Dicks wrote:
is not the serpentine version, when I got it, it had a
RL01 controller in it (I got two RL01 drives too) which I believe need
the straight backplane.
That should be the "CD" backplane (can't remember the part number). I
have one like that, with an RLV11 as well. Yes... dual-height cards
just stack down the left edge.
Pontus, double check your backplane number to make sure that it truly
isn't a serpentine type. If you *do* have a serpentine backplane, and
you stack the boards down the AB slots only, you'll have gaps in the
grant chain. In my experience DEC labeled the backplanes on the upper
side of the backplane sockets, which is visible only if you remove the
cage/backplane from the BN-11 box.
Here are the four types that I have experience with:
An 11/23PLUS in a BN-11 box that has a H9276A backplane. This *is not*
An 11/23 in a BN11-NC box that has a H9273 backplane. This *is not*
An 11/23 in an OEM box with a H9275-A backplane. This *is* serpentine.
A couple of 11/03s in BA-11M boxes with the H9270 backplane. This *is*
So, as Ethen, Pete and others have suggested, check everything with the
Handbook, and make sure you know which backplane you have.