[dm-devel] Hard drives shutting themselves off in RAID mode

[Greg Freemyer]

On 6/18/06, Rune Saetre <rune.saetre at netcom-gsm.no> wrote:
> Hi
>
> > Arno Wagner:
> >> If you can test it with reasonable effort and cost (e.g. put some of
> >> them on another PSU), you might want to do that.
> >
> > Is that safe?
>
> Don't know how safe it is to use different PSU's, but I have done it with
> success several times on old hardware used for testing. I can't think of
> any reason you should run into trouble if ground is common, and the disks
> are powered up first.

Its the common ground part that can be challeging.  I'm not an expert
of PC powersupplies, but in general power supplies have a floating
ground, so if you have two of them plugged in the same AC power, you
will still not have a common ground on the DC side.

Greg
-- 
Greg Freemyer
The Norcross Group
Forensics for the 21st Century