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tldr/pages/linux/btrfs-device.md
2025-07-19 22:28:02 +00:00

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# 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 {{[d|device]}} {{[a|add]}} {{path/to/block_device1 path/to/block_device2 ...}} {{path/to/btrfs_filesystem}}`
- Remove a device from a btrfs filesystem:
`sudo btrfs {{[d|device]}} {{[rem|remove]}} {{path/to/device1|device_id1 path/to/device2|device_id2 ...}}`
- Display error statistics:
`sudo btrfs {{[d|device]}} {{[st|stats]}} {{path/to/btrfs_filesystem}}`
- Scan all disks and inform the kernel of all detected btrfs filesystems:
`sudo btrfs {{[d|device]}} {{[sc|scan]}} {{[-d|--all-devices]}}`
- Display detailed per-disk allocation statistics:
`sudo btrfs {{[d|device]}} {{[u|usage]}} {{path/to/btrfs_filesystem}}`