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btrfs-rescue:tldr:7f54d
The command "sudo btrfs rescue chunk-recover ${path-to-partition}" is used to recover or repair a Btrfs file system chunk on a specific partition.
Here's a breakdown of the command:
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"sudo": It runs the command with administrative or root privileges. This is necessary as Btrfs recovery operations require elevated permissions.
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"btrfs": It is the command to interact with and manage Btrfs file systems.
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"rescue": It denotes that the following command is related to the rescue or recovery operation.
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"chunk-recover": It specifies the specific type of recovery operation to be performed, which is chunk recovery in this case. A chunk refers to a range of data blocks within the Btrfs file system.
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"${path-to-partition}": It is a placeholder for the actual path or device of the partition where the Btrfs file system is located. You need to replace "${path-to-partition}" with the correct path or device name, for example, "/dev/sda1".
When executed, this command initiates the Btrfs chunk recovery process on the specified partition, attempting to recover or repair any faulty or missing chunks within the file system.