Btrfs receive data integrity verification in AlmaLinux 9

Snapshot Restoration and Integrity

AlmaLinux 9 supports the Btrfs filesystem, enabling the use of btrfs send and btrfs receive for incremental backups and snapshot restoration. While these tools facilitate the movement of subvolumes between disks or hosts, the restoration process focuses on the transfer of data blocks rather than an integrated verification of the recovered files.

Current workflows require a separate post-restore phase to ensure that the data on the target volume is consistent and free of corruption. There is uncertainty regarding whether the receive operation provides implicit validation or if manual intervention is the only way to guarantee integrity.

• Does btrfs receive perform any internal checksum validation during the restoration process?
• Is btrfs scrub the recommended method for verifying restored snapshot integrity, or are there more efficient filesystem-level checks?