Before installing, please verify that you have the following programs:
- Xen virtualization (version 3.0.x or 3.1)
http://xen.xensource.com/
- - DRBD (kernel module and userspace utils), version 0.7.x or 8.0.x
+ - DRBD (kernel module and userspace utils), version 0.7.x or 8.0.7+
http://www.drbd.org/
- LVM2
http://sourceware.org/lvm2/