Originally posted by kgardas
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(you can also mix and match more exotic setups e.g BTRFS RAID1 or even RAID10 on top of multiple MDRAID5 groups).
And even if you stay with the default configuration BTRFS still does actually check the data it returns (due to checksums) and since it has (by default) a DUPE of the metadata then at least the filesystem structures should self-heal. This is more than what you get if you put ext4 or xfs on top of md. ext4 and/or xfs will just return data corrupted or not., but both ext4 and xfs (as far as I know) is more tolerant of metadata corruption than BTRFS is- well if both copies of the metadata is broken anyway...
Originally posted by PuckPoltergeist
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Regarding caches on BTRFS as well, most of the horror stories on the mailing list seems to be from more interesting setups with BTRFS on top of bcache/lvm or weird hardware that don't implement barriers correctly so it would seem that BTRFS is just as sensitive as ZFS if not more so.
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