Segmented dmg files - can it be done?
 

I have a Tiger image that converts to a SuperDuper dmg file that is about 10*GB in size. I'd like to segment this into 4 GB chunks so that I can burn the subseqent chunks to DVD for archival purposes. I use to be able to do this with Carbon Copy Cloner. Is there a way to do it with SuperDuper? (High compression yields a dmg that is 6 GB – still too large to fit on a single DVD.)

Not in an automated way, no. But, you can create a sparse image instead and use hdiutil directly to convert and segment the DMG... man hdiutil in Terminal will give you the technique to use.

Thanks for the quick reply. Good to know that it *can* be done, but - ugh! - the man page for hdiutil prints out at 30 pages! Maybe I should put in a feature request! :)

It's not something that's asked for very often, so I'm a bit reluctant to actually add it as a real feature. However, if I find some time, I'll see if I can work up a post-copy script that might do the trick for you... or, if you figure it out (it shouldn't be *that* hard), feel free to post up here!

I'd eventually be interested in this, after freeing up enough temporary disk space for image segments.

See Make large files span multiple optical disks.

The relevant command example from this link is

hdiutil segment -o Desktop/Dogs.dmg -segmentSize 4.37g Desktop/temp.dmg