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1. How "self-healing" is btrfs really?! According to Miller's talk btrfs is making a (circular?) backup of the root tree every 30 seconds. If I remember correctly the root tree is also mirrored several places on disk and on rotational media all those are updated in tandem. This is leading me to believe that there should be no problem in recovering from a corruption.
2. Also in addition to question 1. Is there some sanity checking when writing the root tree? e.g. if you write garbage to the root tree by accident will there be some recovery mechanism there to protect you as well?
3. What is the point with the mount -o recovery ? If there already is a corruption there is there any reason btrfs should not recover automatically by itself?
4. If a disk responds slowly, Will btrfs throw it out of a raid configuration and if so will a btrfsck be less strict about timeouts and will it automatically rebalance the data from the bad disk over to other good disks?!
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