btrfs device

Manage devices in a btrfs filesystem. More information: https://btrfs.readthedocs.io/en/latest/btrfs-device.html.

• Add one or more devices to a btrfs filesystem:
  sudo btrfs device add {{path/to/block_device1}} [{{path/to/block_device2}}] {{path/to/btrfs_filesystem}}
• Remove a device from a btrfs filesystem:
  sudo btrfs device remove {{path/to/device|device_id}} [{{...}}]
• Display error statistics:
  sudo btrfs device stats {{path/to/btrfs_filesystem}}
• Scan all disks and inform the kernel of all detected btrfs filesystems:
  sudo btrfs device scan --all-devices
• Display detailed per-disk allocation statistics:
  sudo btrfs device usage {{path/to/btrfs_filesystem}}