Re: ext4 features

[Thomas Glanzmann]

Hello,

> Checksums are not very useful for themselves. They are useful when we
> have other copy of data (think raid mirroring) so data can be
> reconstructed from working copy.

it would be possible to identify data corruption.

>   What's wrong with DM snapshots?

they're inefficient in matter of disk space consumption because they
don't have a clue of the filesystems that are on top of them.

        Thomas
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