--- aaa/defaults/initrd.scripts	2020-08-28 23:33:36.000000000 +0200
+++ bbb/defaults/initrd.scripts	2021-01-25 17:40:41.671056087 +0100
@@ -1618,6 +1618,9 @@
 		then
 			bad_msg "dobtrfs invoked but 'btrfs' not found; Skipping btrfs device scanning ..."
 		else
+			good_msg "Create btrfs-control device..."
+			/bin/mknod /dev/btrfs-control c 10 234
+
 			good_msg "Scanning for BTRFS devices ..."
 
 			local btrfs_cmd="run btrfs device scan 2>&1"