Re: ext4 features (checksums)

Krzysztof Halasa
2006-07-04T11:19:18Z

Neil Brown <neilb@suse.de> 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