On Sat, 1 Feb 2003, Ross Vandegrift wrote:
>I Am Not an Electrican Engineer, But My Boss Is. I did this once, and
>he had a cow. There was some problem he yelled at me, having to do with
>different PSUs pulling voltage up at a different rate. There's someway
>he said that the differential in voltages would feed back through the
>IDE channels, for some reason....
>
>The short of it was that someone qualified to judge said it was a really
>bad idea to use multiple seperate power supplies.
Ok, I'm gonna have to jump in here now. People have been doing this for
DECADES with SCSI hardware. It's a load of BS. As long as there's a
common ground line, you won't release any smoke. (And I bet they have a
common ground through the AC plug.)
Can you say "external enclosure"? I knew that you could.
(Note: only HVD SCSI hardware has line isolation circuits -- required per
spec to avoid setting SE busses on fire if you plug the wrong thing
in.)
--Ricky
PS: Yes, SCSI feeds power into the bus to power terminators. (usu. everything
feeds power to the bus... common factory default)
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