Add sync statement for efi_create_syructure() + indetation

init.sh

@@ -167,7 +167,7 @@ fi
 # unmount if device is mounted
 umount_device (){
 local mounted_part=$(mount | grep "${1}[0-9]" | awk '{print $3}')
-if [ ! -z $mounted_part ]
+if [ !  "$mounted_part" == "" ]
 then
     for part in $mounted_part
     do
@@ -185,6 +185,7 @@ parted -s $1 mklabel gpt mkpart EFS fat32 1MiB 128MiB set 1 boot on mkpart debia
     sleep 2
     mkfs.vfat ${1}1 -n efi &> /dev/null
     mkfs.vfat ${1}2 -n debian &> /dev/null
+    sync
     mount ${1}2 $2
     create_dir $2/efi
     mount ${1}1 $2/efi