problem in RAID1 + lvm in ubuntu 8.04...

[Brian McKee]

On Mon, Dec 8, 2008 at 4:16 AM, Lalatendu Das <lalatdas at gmail.com> wrote:
{ copious info about his setup }
> Then configured LVM as follows
> I took the RAID array, 2nd partition of 2nd disk 28GB and 2nd partition of
> 3rd disk(28GB).
> pvcreate /dev/md0 /dev/sdb2 /dev/sdc2
>
> Then created volume group as follows
> vgcreate UnicornData /dev/md0 /dev/sdb2 /dev/sdc2


I don't understand why you did this.  A RAID1 array and two regular
partitions as part of an LVM Volume?

If I understand it correctly, you don't know where LVM will put it's
data in the volume, so it might be on the RAID array and it might not
be?  So why use RAID?   Or if you wanted RAID, why not RAID1 the two
drives rather than just part of them?

I'm assuming there's no reason you _can't_ do that, I just don't see _why_.

I went through the other info provided and nothing jumped out at me as
being wrong.

Can you post the output of fdisk -l and mount ?  Perhaps there's
something there....

Brian