New filesystem technology for Linux includes high capacity, snapshots, copy-on-write, and on-the-fly corruption detection.

Almost exactly one year ago, as the developers were discussing changes to the venerable ext3 filesystem, Andrew Morton was heard to say:

All that being said, Linux's filesystems are looking increasingly crufty and we are getting to the time where we would benefit from a greenfield start-a-new-one. That new one might even be based on reiser4 - has anyone looked? It's been sitting around for a couple of years.

Reiser4 looks like it may continue to sit around for a while yet. But that does not mean that there is no interest in the creation of interesting new filesystems. LogFS was discussed here in May, but it's not the only newcomer in the filesystem arena.
The most interesting new contender, perhaps, is btrfs, which was announced by Chris Mason on June 12. It is an entirely new filesystem intended for standard rotating storage with a number of interesting features. These include:

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