Re: limits on raid

[Andi Kleen]

Neil Brown <neilb@xxxxxxx> writes:
> 
> Having the filesystem duplicate data, store checksums, and be able to
> find a different copy if the first one it chose was bad is very
> sensible and cannot be done by just putting the filesystem on RAID.

Apropos checksums: since RAID5 copies/xors anyways it would
be nice to combine that with the file system. During the xor
a simple checksum could be computed in parallel and stored
in the file system.

And the copy/checksum passes will hopefully at some
point be combined.

-Andi
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