fixed can not find loop device
INFO: [2021-02-10 11:34:10] Running: 'parted -s /dev/loop1 mklabel MSDOS'... Error: Could not stat device /dev/loop1 - No such file or directory.
INFO: [2021-02-10 11:34:10] Running: 'parted -s /dev/loop1 mklabel MSDOS'... Error: Could not stat device /dev/loop1 - No such file or directory.