Apple formalized in a technical availability of u "Recovery Disk Wizard" for OS X Lion. This utility allows you to create a USB key containing a partition recovery Lion OS X for your Mac, a clone of your HD partition Recovery.
The procedure is simple: run the software, insert your USB key (at least 1 GB Mac OS Extended partition with GUID partition table - you can use a hard drive or an SD card for example), and that key will be transformed into volume recovery OS X.
