3 ms·

BtrFS was previously restricted to crc32c checksums. This was enhanced to allow several more, including sha256. The crc32c checksum has also been improved as xx

by chasil 5y ago

BtrFS was previously restricted to crc32c checksums. This was enhanced to allow several more, including sha256. The crc32c checksum has also been improved as xxhash, which promises fewer collisions for safer deduplication. When configured for sha256, BtrFS uses a checksum that is as strong as ZFS. However, the checksum must be chosen at the time of filesystem creation. I don't know of any way to upgrade an existing BtrFS filesystem. Contrast this to ZFS, which allows the checksum to be modified on a file-by-file basis.

ziml77 5y ago
Hmm well that's good to know. I like the idea of being able to have mismatched drive capacities and easy expandability which is why I had been looking at Btrfs. I will have to look more into the checksum options.
namibj 5y ago
send/receive should allow for checksum rotation; however this isn't in-place.
- chasil 5y ago
  I didn't think of that as a migration path.
  - namibj 5y ago
    Breadth/creativity in the search of technical solutions is my specialty. Hope it helped!