Once the partition is created, you must copy a boot loader to the file EFI/BOOT/boot圆4.efi (assuming booting on x86-64 systems with 64-bit EFIs). If you use parted or GPT fdisk, you'll need to do so by running mkdosfs or some other tool. If you create an ESP with GParted, it can create the FAT filesystem at the same time you create the partition. This might work on MBR disks, too, but I'm not positive of that.) In GPT fdisk ( gdisk, sgdisk, and cgdisk), it's identified by a partition type of EF00. ![]() (I think that recent versions of libparted use the "esp flag" as a synonym for "boot flag," so you could set that instead. In Linux, libparted-based tools, such as GParted and parted, identify the ESP on a GPT disk by the presence of a "boot flag," so you must set that flag on the ESP - but this works only on GPT disks. An ESP is a partition with a GPT type code of C12A7328-F81F-11D2-BA4B-00A0C93EC93B (or, on an MBR disk, a type code of 0圎F) and that uses the FAT32 filesystem (although FAT16 or even FAT12 can generally be used). Creating an EFI System Partition (ESP) can be done in several ways, but is only the start of what you need to do.
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