Is possible have mdadm, lvm2 and drbd

Hi to all

can anybody help me?

I want to have mdadm RAID1, lvm2 and drbd on my PVEs.

I have practice with mdadm RAID1, too with drbd.

Tutorials:
DRBD : http://pve.proxmox.com/wiki/DRBD
mdadm : http://www.howtoforge.com/proxmox-2-with-software-raid

But i don't know how unite these technologies? - My problem is with lvm.

I tried mdadm on top of DRBD, and DRBD on top of lvm2, after, I create the Physical Volume, after, I create a Volume Group, but with this configuration don't see the replica of Volumen group on the other node

I will be very grateful to anyone who can help me.

Cesar