Re: install Etch with raid level 10

[Scott Lair <scott@lairhome.com>]

C M Reinehr wrote:
> On Wednesday 26 September 2007 11:53, Gilles Mocellin wrote:
> > Le Wednesday 26 September 2007 16:48:14 Scott Lair, vous avez écrit :
> > > Dave Ewart wrote:
> >
> > [...]
> >
> > > > Normally, one makes a RAID-10 software setup as follows:
> > > >
> > > > mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sd[ab]1
> > > > mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sd[cd]1
> > > > mdadm --create /dev/md2 --level=0 --raid-devices=2 /dev/md[01]
> >
> > [...]
> >
> > > I've got some time to mess with it for a while and I'll post
> > > back the results.
> > >
> > > thanks,
> > >
> > > scott
> >
> > Instead of having md over md device, I suggest to do stripped LVM over RAID
> > 1. And it is supported during installation !
> 
> Damn! That's a good idea. I'm kicking myself for not thinking of that.
> 
> cmr

I wish I would have thought of it - LVM was staring me in the face last night!
Sounds like RAID-10 and LVM/RAID-1 are functionally equivalent. I didn't know
LVM did stripping.  I'm wondering now what the performance difference might be
if any.

thanks,

scott