Date: 12/07/06 (Computer Geeks)    Keywords: software

It must meet the following requirements:
1. Good compression. This means something that's not archaic like what NTFS uses (LZ77).
2. Good speed. Some decrease in speed compared to normal drive is acceptable, but not a lot.
3. Compression of an entire FS (A) or a directory (B). If (B), then #4 doesn't apply.
4. Virtual drive: a file containing the compressed FS which can be mounted as a normal drive (like FreeBSD vnode); OR
virtual drive software that can mount a file containing an arbitrary FS for reading and writing (i.e. not a CD/DVD).

In other words, I basically just want automatic compression of either a directory or file system, done transparently to the programs accessing the files and at a reasonable speed.

Source: http://community.livejournal.com/computergeeks/1008151.html