Re: ext4 features (checksums)

[Krzysztof Halasa]

Neil Brown <neilb@xxxxxxx> writes:

> With checksums - the filesystem is in a better position to:
>  - be selective about what is checksummed - no point checksumming
>    blocks that aren't part of any file.  Some blocks (highlevel
>    metadata) might always be checksummed, while other blocks
>    (regular data) might not if a 'fast' option was chosen.

The same applies to RAID - for example, why "synchronise" unused area?

While fs vs. RAID provides a good layering scheme and is easier,
integrating them into one entity (as with ZFS) would certainly be
more efficient (and probably harder to maintain).
-- 
Krzysztof Halasa
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