ext3 is ext2 with a journal file added, so dump/restore should work with it.

> I'd like to backup an ext3 filesystem.  I'm fond of the interface for
> dump/restore, but the man page says it's only compatible with ext2.  And
> dump is at version 0.4-something, which doesn't give me big warm
> fuzzies.  Also, I've ran across a few posts here and there on the 'net
> claiming that dump is not reliable on 2.4 kernels for some reason.  I've
> done a couple tests and successfully dumped and restored up to 20 gigs
> on an ext3 filesystem without any obvious problems.
> 
> Has anyone encountered any issues with dump/restore on Linux?  Or have a
> good explanation of why this might be a bad idea?
> Thanks,