EFI system partition

EFI system partition: On Itanium-based computers, a portion on a GUID partition table (GPT) disk that is formatted with the file allocation table (FAT) file system and contains the files necessary to start the computer. Every Itanium-based computer must have at least one GPT disk with an EFI system partition. The EFI system partition serves the same purpose as the system volume found on x86-based computers.

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