I don't know the specifics you are looking for, but I have read that when using encryption algorithms on files you don't need to compress those same files (either before or after encryption) as the two tasks create roughly the same file sizes due to the mathematical similarities between compression and encryption.
If this is true:
Test this out by creating a small file. First encrypt a copy of it and use ls -lha to see the size. Then compress another copy of the original file and again use ls -lha to check the size. Compare the two file sizes. If they are roughly the same, then you can estimate what a folder full of small files compressed would be in size once the same folder is encrypted...
I believe that if the above is true then it should hold true for files being placed on an already encrypted disk or folder.
Deion "Mule" Christopher
Last edited by MoMule; 05-18-2007 at 12:08 PM.