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From: Wojciech Puchar <wojtek@tensor.gdynia.pl>
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Subject: mkisofs,cd9660 and hard links
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i did copy of small server (taking about 3GB space) to DVD with growisofs 
-R and using --exclude to not copy /dev etc..

worked fine.

and recovered fine, but taking much more space, because all hardlinks are 
now separate files.

it looks like cd9660 filesystem doesn't "see" hardlinked files as 
hardlinked, but as separate ones.

is there any program to fix it like comparing all very similar files on 
disk and hardlinking them?