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

[Rune Saetre <rune saetre netcom-gsm no>]

Hi

In PC's ground is usually connected to the box itself. To be sure ground 
in the PSU's can just be connected.

I have never experienced problems with ground loops in PCs. In PC's you 
have all kinds of ground loops, as the same ground is usually connected to 
signal leads, power supply leads and the chassis. As long as the cables 
are kept short this shouldn't cause problems.

Rune

---
Rune Sætre <rune saetre netcom-gsm no>
NetCom as
..

On Sun, 18 Jun 2006, Greg Freemyer wrote:

> On 6/18/06, Rune Saetre <rune saetre 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
>
> --
> dm-devel mailing list
> dm-devel redhat com
> https://www.redhat.com/mailman/listinfo/dm-devel