8 Nov
2006
8 Nov
'06
10:47 p.m.
Jay West wrote:
Bill wrote....
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).
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). In this case I presume that you
only have one cabled up anyway. The confusion usually arose because
some older drives could be cabled to two systems simultanbeously
(although you had to mount as read-only on one if you valued your
sanity and your data).
Antonio
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.
Ah, that makes sense. That doesn't seem to be documented (cept
perhaps in the prints which I haven't looked at yet). So, how does
one test (or tell) if a given cable is non-null-modem'd or
null-modem'd (with respect to SDI), and what should it be end to end?
That way I can find the right kind of cable :)