Translations:Btrfs/124/en
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- It is possible to detect nearly any corruption because of the checksums
- When the power is lost, or the disk is disconnected, all old data is save. WHY?
- Every bit of "old" data from before the power loss or the disconnection is present because it is NOT overwritten
- Only the newly written data may be partly damaged
- The metadata may also be partly damaged
- When mounting the volume it is possible by analyzing checksums and metadata to find the point in the filesystem where all was good
- Btrfs will automatically roll back to this point, then it can mount the file system writable