Ok, so you should exclude stuff like /proc when trying to duplicate complete system to another machine with tar (dump/restore wasn't an option, because the filesystem layout on the target was quite different from the original, and the filesystem too - xfs instead of ext3 on Linux boxen).
Unfortunately I didn't think about it until tar freaked out because the target / fs was full...
Unfortunately I didn't think about it until tar freaked out because the target / fs was full...