[ale] Considerations Regarding Dual Power Supplies

[greg.freemyer at gmail.com (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
-- 
Greg Freemyer
Litigation Triage Solutions Specialist
http://www.linkedin.com/in/gregfreemyer
First 99 Days Litigation White Paper -
http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf

The Norcross Group
The Intersection of Evidence & Technology
http://www.norcrossgroup.com