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