On Tue, Jun 20, 2006 at 05:07:35PM +0100, Christian Smith wrote:
> 
> Except I've experienced a SS20 that had to have the main board replaced 
> due to an unterminated bus. The unterminated SCSI signals caused some 
> hardware failure, though I'm not sure of the details. 
>

Ummm I find that diagnosis _extremely_ unlikely.  The scsi bus is,
technically, an open collector bus.  If it is unterminated then there
is supposed to be no voltages on it - this does not preclude the bus
voltages just floating about and happening to make things work.  The
"old" style terminators were just a resistor network that held each of
the bus lines at the right voltage, the scsi devices would then sink
current to pull the line down.  Modern terminators use an active
device to do the same thing in a more precise manner.

An open scsi bus would not fail, it may or may not work with devices
on it but it should be perfectly safe, from an electrical point of
view, to leave it unterminated.  I suspect something else caused your
failure.

-- 
Brett Lymn