The example creates and initializes an empty hardware diagnostics
    partition SYS$DIAGNOSTICS.TMP within the cluster-common area of
    the target system disk. (The actual diagnostic partition name is
    SYS$DIAGNOSTICS.SYS.) The diagnostic partition is comprised of
    256,000 blocks, and is subsequently registered within the OpenVMS
    I64 bootblock structures using the DCL command SET BOOTBLOCK.

    As with the SYS$EFI.SYS example, this example deliberately shows
    the hypothetical partition filename SYS$DIAGNOSTICS.TMP and not
    the actual partition SYS$DIAGNOSTICS.SYS partition filename.
    Use of the actual partition name would replace any existing
    diagnostics partition.

    When a new diagnostic partition is created, or is relocated on
    the system disk, or is deleted, use the SET BOOTBLOCK command
    or invoke the sys$setboot image directly to update the OpenVMS
    I64 bootblock and related structures accordingly. Use the SET
    FILE/NOMOVE command to prevent a defragmentation tool from
    erroneously relocating the file.