Delete the EFI system partition (created when Apple first uses a USB flash drive)

The original hard disk of the Mac Book was used as a mobile hard disk. When the hard disk was formatted in Windows 7, a mb efi system partition could not be deleted or formatted. In Windows, the EFI partition is a protected partition and cannot be deleted or formatted. The EFI partition cannot be found in the disk tool on Mac.

A clean command was found when the diskpart tool in Windows was used to clear configuration information or all information from the disk. Finally, the mb efi system partition is deleted successfully using this command. Brief record operation method:

 
# Enter the diskpart command in cmd To Go To The diskpart environment C: \> diskpart # first list the disk list and check the disk number to be processed. Assume It is 1 diskpart> List disk.1# Select diskpart> select Disk1# List the partitions on the selected disk to check whether the disk is correctly selected diskpart> List partition # after confirming the disk, enter the clean command to clear the disk diskpart> cleandiskpart.
 

The Select disk num command is used to select the disk to be cleared. The default disk Number of the system is 0. Therefore, if you select a system disk, run the following command:

 
Diskpart> select disk 0
 

The number of the first mounted Mobile Disk is 1, and so on. The disk number here is the same as the number in "Computer Management-> disk management" of Windows (such as disk 0 and Disk 1 ).

List partition is used to view the partition information of the selected disk.

the clean command can clear/delete all information (such as partition tables) on the selected disk, and the EFI system partition will also be deleted. After using the clean command, Open Control Panel-system-management tools-Computer Management (Windows 7) and click disk management on the left, here we can see that the "Disk 1" (Mobile Disk) is already clean. You need to initialize the disk before formatting it. Right-click Disk 1 block and choose initialize disk. After initialization, right-click the block on the Right of Disk 1 and choose create volume or format, after that, the disk can be used.