-blkdev_num=$(dmsetup ls | grep ventoy | sed 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1:\2/')
-vtDM=$(ventoy_find_dm_id ${blkdev_num})
+if [ ! -e /dev/ventoy ]; then
+ blkdev_num_mknod=$(dmsetup ls | grep ventoy | sed 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1 \2/')
+ mknod -m 660 /dev/ventoy b $blkdev_num_mknod
+fi