[ale] md w/raid 0 before LVM?

Greg Freemyer greg.freemyer at gmail.com
Mon Jun 2 08:49:12 EDT 2008

On Mon, Jun 2, 2008 at 3:42 AM, Brian W. Neu <ale at advancedopen.com> wrote:
> to store snapshot data, I put a physical volume on top of a raid 0 and
> extended the volume group onto it.
> the problem is that as far as boot sequences go, it looks like only raid
> 1 mirrors are started before lvm -- and since a physical volume is
> missing (since the raid0 hasn't been initialized), the volume group
> doesn't start -- hence the machine doesn't boot.
> Does anyone know a way to get the kernel to somehow do this, or is it
> truly impossible?

I don't know the answer, but why are you doing it in the first place?

Seems like you're loosing most of the management advantage of LVM by
putting raid 0 below it.

If speed is not critical, you could use LVM to add the drives
individually.  Not sure if you can setup stripping with lvm or not.
If not, maybe you should request that as a feature enhancement from
the lvm team.

Greg Freemyer
Litigation Triage Solutions Specialist
First 99 Days Litigation White Paper -

The Norcross Group
The Intersection of Evidence & Technology

More information about the Ale mailing list