PCI device ordering

[dsr-mzpnVDyJpH4k7aNtvndDlA at public.gmane.org (Dan Ritter)]

On Mon, Nov 29, 2010 at 04:23:49PM -0500, Derek Atkins wrote:
> Dan Ritter <dsr-mzpnVDyJpH4k7aNtvndDlA at public.gmane.org> writes:
> 
> > Don't do that.
> >
> > Mount by label or by UUID instead.
> >
> > That way, it doesn't matter what order they're detected in, and
> > you can even swap around cables. (Boot drive detection
> > permitting, of course.)
> 
> Hmm, but how would this affect MD raid devices?  For example,
> /proc/mdstat reports raid devices based on sdX.  Although I guess
> /etc/mdadm.conf does set up devices based on UUID.  So perhaps it's safe
> from device re-ordering as well?

Yes. mdadm.conf can use UUID as well, and that's the preferred
method for all but the simplest (RAID1, 2 disks) systems.

-dsr-

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