On Thu, 2006-03-09 at 13:12 +0000, James Wilkinson wrote:
> Depends on the card: some of them will have up to three separate
> buses: two completely separate internal SCSI buses (channels), and one
> external. In that case, the card will always be at the end of (and
> terminate) all buses, and adding external devices won't affect the
> internal ones.
Even that's no compulsion that a card will *always* be at the end of a
chain. It may well be that you have drives throughout a box, and it's
easiest to connect the ribbon cable to the card somewhere in the middle
of the transmission line.
Box upper section with externally accessible drive bays
CD-ROM -+
HDD caddy -+
|
Host -+
|
HDD -+
HDD -+
+---+- HDD
+- HDD
Lower box section with internal drive bays
Even with multiple channels available on a card you mightn't want to use
them all, or you might be using them all and have to wind cables around
like I've just outlined.
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