EFI_STATUS(EFIAPI * EFI_DISK_READ)(IN EFI_DISK_IO_PROTOCOL *This, IN UINT32 MediaId, IN UINT64 Offset, IN UINTN BufferSize, OUT VOID *Buffer)
EFI_STATUS(EFIAPI * EFI_DISK_WRITE)(IN EFI_DISK_IO_PROTOCOL *This, IN UINT32 MediaId, IN UINT64 Offset, IN UINTN BufferSize, IN VOID *Buffer)