Hi mika,
Thanks you for your detailed wiki: Persistency on grml http://wiki.grml.org/doku.php?id=persistency
I got it working after following your detailed instructions. However, I found that you've mixed the two cases. The wiki should read:
To use the persistency feature you need
* either a writeable partition with label 'live-rw' * or execute the command 'live-snapshot' then follow the instructions.
I.e., both method can get you the persistent feature, but either one is enough. you don't need both. For 'live-rw' partition, checking whether the live snapshot is included by running 'mount | grep live-snapshot' does not apply,
Moreover, if you have a writeable partition with label 'live-rw', then having another 'home-rw' one is not necessary unless you want to.
cheers