Configure Btrfs subvolumes and snapshots on Slackware

1. When to use it

Useful when you want to experiment with quick changes without recreating the filesystem from scratch each time.

Btrfs | subvolume | snapshot | filesystem | rollback

mkfs.btrfs /dev/sdb1
mount /dev/sdb1 /mnt
btrfs subvolume create /mnt/@data
btrfs subvolume snapshot /mnt/@data /mnt/@data-snap-$(date +%F)

Adjust host names, IPs, interfaces, paths, and versions to the real system before making the change persistent.

btrfs subvolume list /mnt
btrfs filesystem usage /mnt
mount | grep btrfs

Confirm that the output matches the expected state before considering the intervention complete.

Snapshots are not backups: without a second copy you remain exposed to the same physical failures as the original disk.

[ ] Steps completed\n[ ] Config updated\n[ ] Tests executed\n[ ] Rollback ready\n[ ] Logs checked