How to use U disk /mobile hard disk to install EFI boot mode win8.1 system

EFI boot has been more and more respected by everyone, especially laptops, most of the recent mainstream motherboards generally support UEFI boot, so-called UEFI boot It is the EFI boot disk made by U disk. This kind of booting method is faster and safer. For UEFI boot, I have already said in the previous article. If necessary, please check the related reading below. Today is also beautiful. The network mainly gives examples to explain how to install the win8.1 system started by efi.
Before you start, declare my environment:
ASUS notebook, two disks, one is mSATA 64G solid state drive (reformatted), one is 1TB 2.5 inch ordinary mechanical hard disk, first SSD solid state The hard disk is formatted as GTP, which is used to install the win8.1 system. The data in the mechanical hard disk is intact.
The specific installation steps are as follows:
Installation step one, extract the original win8.1 image file to the mobile hard disk, a format of the main partition of FAT32 (read and write efi file can only pass FAT32 format), The previously downloaded Shell.efi is also placed in the root directory.
Installation Step 2, restart the computer, enter the BIOS, select the Launch efi file from.... option, the computer automatically reads and writes the mobile hard disk into the shell command line.
Installation Step 3, input fs0 (the first hard disk) or fs1 (0 or 1 is the hard disk number), enter the mobile hard disk: input dir to view the file directory, if you enter the correct, you will see the win8.1 decompression The few folders;
Enter cd efi into the efi directory; enter cd boot into the efiboot directory; enter bootx64.efi to start the installer and enter the system installation interface.
Installation Step 4. Enter the installation key and enter the installation disk interface. Press shift+F10 to enter the command line mode to partition and format the hard disk.
Enter the DISKPART command, then enter the list disk command to list the hard disk on the current computer; select the corresponding disk according to the size, where the SSD corresponds to the 0, so enter select disk 0, select the operation;
enter the clean command Clear the disk, enter convert gpt to gpt partition; then create an efi partition 200Mb and a msr partition 128Mb:
create partition efi size=200 //boot system
format quick fs=fat32 //formatted as fat32
create partition msr size=128 //Microsoft reserved partition
create partition primary //The rest is created as a primary partition, used to install the system
Installation step 5, enter the installation interface again, select the SSD Three partitions were installed and it was successful step by step.