8 Nov
2006
8 Nov
'06
6:52 p.m.
I think (It's a long time since my '86 DEC Days...) there was one of the
cables between the drive and the cabinet that was kind of null modem'd.
This could be the problem if at one time the drive was direct cabled to the
UDA and is now going through one cabinet-> drive cable without the
corresponding Cabinet--> uda cable hookup.
Been a long time... I could be wrong. If there's an extra cable in the
wiring try to just eliminate it.
(I assume the correct drive number's on the drive select plug etc.)
On 11/8/06, Jay West <jwest at classiccmp.org> wrote:
After swapping out 3 HDA's and 2 servo boards, I had one RA81 working -
mostly. For some reason the system wouldn't see it on port A, but it would
on port B. Oddness.
Anyways, since the day I had it working (and got RT11 loaded on it), the
system will no longer see it. I have moved around and changed some of the
cabling between the drive cabinet and the cpu cabinet, but I don't see
that
I've done anything wrong. I put the cabling back the way it was (I could
be
mistaken) and still no joy. During the basic UDA50 diag it says there are
no
drives connected (same thing for >>>B DU0).
I'm still plowing through the docs (again), but can anyone suggest
anything
"obvious" that isn't clear in the docs with regards to connecting an RA81
to
a UDA 50 that a newbie like me could be missing?
I'm up for any input :)
Jay West