[syslinux] documentation persistent mode

[Sebastian Geiermann]

Hi @ll,
Building your own persistent live system is very easy with syslinux, but
how does is work?
Is the casper-rw a translucent loopdevice over the loopdevice from the
squashfs.image from the cd? and where is the part in the code?
i´m searching for some information, documentation about the syslinux,
specialy the part of persistens and casper{-rw}

hope 4 help :D

greetz