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Checksums do not provide "self-healing". Ever. They can only tell you if a piece of data is wrong or not. In the case of BTRFS it's less a case of self-healin
by tscs37 9y ago
Checksums do not provide "self-healing". Ever.
They can only tell you if a piece of data is wrong or not.
In the case of BTRFS it's less a case of self-healing, the data is not healed, rather that metadata is replicated across the disk.
I believe ZFS does the same but I'm not sure of this. I'm certain that ZFS does this if it has several disks to replicate from.
I'm not aware of APFS being self-healing on a single disk.
- binarycrusader 9y agoYes, you obviously need additional pieces of information for reconstruction/repair, sorry for the confusing wording.
- jorangreef 9y agoYes, ZFS also replicates metadata on a single disk.
- binarycrusader 9y agoYou can even tell ZFS to do the same thing with user data with the ditto blocks feature.