googling around searching for info (and status) about unionfs, aufs, unionmount, encountered a hyperlink: "unionfs in examples", from here: http://www.fsl.cs.sunysb.edu/project-unionfs.html
and clicking on it:
"last, but not the least, AuFS is really stable
in real world situations. I used unionfs in the past, but my second name for it was 'NULL POINTER DEREFERENCE'. I can see those errors still happening in latest unionfs 2.5.x as well, last one I've found in the mailing list was from 27th of April 2011
aufs info: http://aufs.sourceforge.net/aufs.html
a recent thread about unionmount status ... https://lkml.org/lkml/2011/4/12/510
After several days reading up and down on the net, my idea is that right now the best choice is aufs
, of course may be I'm completely wrong about.
Apparently mylivecd script and pclos kernels are already providing aufs support, I'm going todo some testing around aufs "mylivecd --ufs aufs
" in the next days...