Recovers superblocks from backup.
Examplesudo btrfs-select-super -s 1 /dev/sdb1
sudo btrfs-select-super -s 1 /dev/sdb1
Allows the selection of a superblock in a Btrfs file system.
Examplesudo btrfs-select-super /dev/sda
sudo btrfs-select-super /dev/sda
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