btrfs-read-only-subvolume · shipping · also Btrfs subvolume ro property

Btrfs read-only subvolume

A Btrfs read-only subvolume is a subvolume whose ro property prevents modification of its file contents and directory hierarchy.

The property belongs to the subvolume, not its access path: a read-only mount does not set it. A parent snapshot does not include nested subvolume contents; those locations become stubs. [1] [2]

Relations

related

btrfs, snapshot, read-only-mount, block-device-read-only

Limitations

• This is not device-wide write protection or an independent backup. [2]

Citations

1. Btrfs documentation: subvolume ro property (accessed 2026-10-15)
2. Btrfs documentation: subvolume flags and non-recursive snapshots (accessed 2026-10-15)
3. Hesela: Btrfs tree logs and read-only scope boundaries (accessed 2026-10-15)

JSON: /data/terms/btrfs-read-only-subvolume.json