Like Charles Dimino, you're not following the point. The security limitations of FDE come from doing crypto at the block layer. If your cryptosystem is giving something that (a) transparently encrypts and (b) mounts as a filesystem, it's block crypto, and shares the same problems as whatever cryptosystem unlocks your boot drive.

The problem is block-level crypto. It has nothing to do with whether it's layered on top of a hardware disk drive.

It's "block level" encryption.

Some folks call that "full disk encryption", but since there's a separate feature in TrueCrypt that calls itself "full disk encryption" and is actually encrypting the entire disk, to the point where TrueCrypt has to supply a boot loader to decrypt, it's probably reasonable to want to differentiate the two.

Thomas doesn't see the difference because it's all "block level" encryption, and apparently the only thing in the world that matters is crypto (rather than the presentation and adoption of crypto), but the difference is mainly in the boot loader aspect.

I have no idea why you think it's productive to litigate the difference between "block-level encryption" and "full-disk encryption", but if it makes you feel better we can just pretend we switched the terms, because my point applies equally to them --- they're synonyms.

I also have no idea where the "I'm telling the world there shouldn't be a tool like Truecrypt" came from. I think you've misread me.

Full-disk encryption is block-level encryption. If you're using TrueCrypt to encrypt anything, you're using block-level encryption. There is no functional difference between them. If you are not encrypting your entire disk, then block-level encryption is a bad idea because 1) it doesn't provide authentication, and 2) block-level encryption (using strategies like XTS) is not as strong as regular authenticated encryption using CBC and a MAC or whatever.

If you're not using TrueCrypt for full-disk or full-volume encryption, you'd be better off using basically anything else. There are plenty of cross-platform tools for doing that kind of thing.