Disk dump, LVM and HP-UX

I'm working with a HP-UX ssytem at work: it has one drive, which is partitioned with LVM. We want to mirror this drive to second drive, so we can swap the drives when we lend the machine out (recently we lent the machine to a contractor who tried to upgrade it, and wiped out the drive in the process..) :) Would the dd command be all I need to copy the contents of the first drive to the second drive, or is it more complicated with LVM disks?