9 Nov
2006
9 Nov
'06
6:32 a.m.
It was written....
There is (AFAIK) only one type of SDI cable and you
need an odd number
of them
between drive and controller. Typically you have three: controller to
system cab bulkhead (internal cable), system cab to drive cab (external)
and drive cab bulkhead to drive (internal).
Understood, but here's the wrinkle
that confuses me... SOME of my ra81
drives have a cable inside the drive that goes from the personality card to
a block on the back of the drive that presents an AB port on the back of the
drive. SOME of my ra81 drives have a cable inside the drive that connects to
the personality card and goes all the way out the back of the drive a few
feet with connectors on the end. So on those drives there is no "port" on
the back of the drive. In the case of the first style drive, does that
internal to back of the drive bulkhead count as one of the 3? Or are you
supposed to have 3 from there out (back of drive to cabinet bulkhead, then
drive cabinet bulkhead to cpu cabinet bulkhead, then cpu cabinetn bulkhead
to uda50)? I'm not sure if the two styles of drive cabling count differently
for an odd number of cables.
Another source of confusion (although probably not
here) is that
although
there are two ports (A & B) only one is active at a time and switching
between them takes a second (or two).
Understood already :)
Thanks!
Jay