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The problem is that if the SSD suffers a power failure and reverts a 1 megabyte block of metadata to the way it was yesterday, the filesystem won't see that as
by londons_explore 1y ago
The problem is that if the SSD suffers a power failure and reverts a 1 megabyte block of metadata to the way it was yesterday, the filesystem won't see that as corruption - since all the checksums will match.
Yet all the pointers in that metadata will point to data which no longer exists, and your filesystem will be destroyed.
- Quekid5 1y agoSo... metadata checksums? I mean if enough data/metadata gets corrupted you're SOL either way. For example, in ZFS the metadata is checksummed such that pointers to the data carry the checksum for that data.