no se si ya lo sabeis pero....

WARNING: Reiser4 has just been released. Namesys has the most stringent QA process of any Linux maintainer, a firm belief that no user should hit a bug that developer testing could find first if the effort is made, a by now grand archive of filesystem tests, and no one on our mailing list can make it crash any more, and all of this is why it took us so long to release it, but until a program has seen a few million real users you should not use it for a mission critical server. For that, use ReiserFS V3 for now, as V3 has millions of users and goes many months between bug reports (and the bug reports we do get relate to tweaks someone outside Namesys added, not core code.)