Tong wrote:
unionFS is Puppy Linux, it allows 5 layers to work together, and it has detailed docs on how it is done:
http://www.puppyos.com/development/howpuppyworks.html
BTW, I have planned long time ago to write the author of Puppy Linux a personal email to invite him join on board to develop grml, but haven't go time to do that yet. :-)
Puppy Linux is nice. We considered it. What decided grml instead is the portable Debian system. Puppy is anything but standard. Puppy has its own repository system, etc. That means extra work when you want to install things not in the Puppy repos. With a big USB hard drive, Puppy's compression and clever games are don't-cares. USB2 hard drive seek/r/w speed is so much faster than CD's that access/speed issues are don't-cares.
Summary -- borrowing Puppy ideas is fine, if compatible with grml2hd portable USB systems. (No reason for problems, just saying.) We believe the days of live CDs are numbered as high-capacity mobile storage devices get cheaper. We get 80 Gig USB2 bus-powered palm drives for less than $100.
But you're right, Puppy is clever, though grml might teach Puppy some lessons too.