LiveDVD-Persistence-Mode

Persistence Mode
The latest Gentoo LiveDVD offers the option of using persistence to store changes on the USB. It uses aufs to layer a read-write file system on top of a read-only squashfs compressed file system. This is great, because it allows you to make changes to the livedvd and have those changes appear on future reboots.

Requirements
In order to have persistent data on the latest livedvd you will need to meet the following requirements


 * 1) At least 256M of free writable space available
 * 2) Writable device i.e (usb stick, hard drive or ssd)