[ale] Considerations Regarding Dual Power Supplies

[Greg Freemyer]

On Tue, Oct 7, 2008 at 7:07 AM, Jim Lynch <ale_nospam at fayettedigital.com> wrote:
<snip>
>   I've been around computer installations for many years
> now and can't ever recall ground loops being a problem or even being
> discussed.

We use to worry about them a lot when I built avionics trainers (late 80s).

I think the problem was the low-voltage single ended data signals we
had running around.

I suspect it can still be a problem, but technologies like
SATA/USB/firewire use differential signals which let the controller
and the drive be at different ground potentials. (Or so I understand.)

Greg
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