+1, having the visibility (and the ability to correct it) is also often a leading indicator of drive failure. I would argue though that at this point most othe

+1, having the visibility (and the ability to correct it) is also often a leading indicator of drive failure. I would argue though that at this point most other filesystems have this, but they're not as ergonomic/obviously built in. LVM has integrity checking at the volume level (if you give drives to the pool instead of giving the pool an already-RAIDed device), mdraid has dm-integrity. The options are there but not quite as discoverable.