[ale] md w/raid 0 before LVM?

[Greg Freemyer]

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
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