[lug] ZFS

[Daniel Webb]

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From Sean R.'s blog:
http://www.tummy.com/journals/entries/jafo_20060516_183521

For example, the "RAID-Z" that it includes (in addition to RAID-0 and RAID-1)
doesn't require that discs be the same size. The file-system will manage
data-writes to ensure that data is replicated across multiple drives. Because
everything is checksummed, accidentally overwriting a disc, corruption (even
at the controller or disc level) can be detected with a "zpool scrub". If you
have redundancy, it will even be repaired during the scrub.
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Wow.  This is exactly what I've been pining for with all those questions about
robust storage and backups, and my observation that corruption goes undetected
sometimes on ext3.  Sounds like this does everything I was asking for.
Hopefully it will be ported to Linux someday when it's stable.  I'm drooling.

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