diff --git a/entry.sh b/entry.sh
index 5bd06b1..7faf23e 100755
--- a/entry.sh
+++ b/entry.sh
@@ -17,6 +17,9 @@ function first_stage(){
 	apt install -y debootstrap cryptsetup btrfs-progs lvm2
 	
 	if [ -d /dev/vg0 ]; then
+		mount | grep target | awk '{print $3}'| sort -r | while read LINE; do
+			umount -l $LINE;
+		done
 		swapoff /dev/vg0/swap || true
 		vgchange -an /dev/vg0
 	fi
@@ -55,7 +58,7 @@ function first_stage(){
 	
 	LVM_SIZE=$(dev_size /dev/mapper/cryptlvm)
 	
-	SWAP_SIZE=$(($(mem_size)/1000/1000))
+	SWAP_SIZE=$(($(mem_size)/1024/1024))
 	ROOT_SIZE=$(($LVM_SIZE/1024/1024-SWAP_SIZE))
 	
 	echo lvcreate /dev/vg0 --name=root --size=${ROOT_SIZE}M