> You can do the same today on Linux with LVM snapshots. They are only
> useful for read-only consistency checking because they are read-only.
> (so in case of a problem you'll need to umount and rerun fsck on the
> normal device)
Also there is ext2 based work going on using phase tree rather than journalling
which gives you similar journal properties, in future snapshots and also
very nice handling of multipath error recovery.
Alan
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