Valid on Integrity server systems only.

    Initializes the boot block on the target device.

    Format

      SET BOOTBLOCK  [boot-file]

1  –  Parameters

 boot-file

    Specifies the filename of the boot file for the target disk.

    Architecture-specific defaults are applied for the
    boot file. For Integrity servers, the default is
    SYS$SYSROOT:[SYS$LDR]SYS$EFI.SYS (SYS$EFI).

    The boot file must be contiguous. If the target boot file is
    not contiguous, use the DCL command COPY/CONTIGUOUS or another
    functionally similar mechanism to recreate a contiguous version
    of the boot file.

    The boot file must also be marked NOMOVE (using the DCL command
    SET FILE/NOMOVE) to avoid a bootstrap failure that could result
    from the normal and expected operations of disk defragmentation
    tools.

2  –  Description

    The SET BOOTBLOCK command writes a boot block onto the specified
    disk.

    As an alternative to using the SET BOOTBLOCK command, you can use
    RUN to invoke the SETBOOT utility, which then prompts you for all
    required input.

3  –  Qualifier

3.1    /BLOCK_SIZE

       /BLOCK_SIZE=512 (default)
       /BLOCK_SIZE=2048

    Specifies the target block size for the bootstrap device, in
    bytes.

    The 512-byte block size applies for most disk devices. The 2048-
    byte block size typically is used only when writing the boot
    block to specific OpenVMS Integrity servers CD and DVD devices.

3.2    /Integrity

       /Integrity servers

    Specifies OpenVMS Integrity servers as the target architecture
    for the boot block. The default boot file for OpenVMS Integrity
    servers is SYS$SYSROOT:[SYS$LDR]SYS$EFI.SYS.

3.3    /PRESERVE

       /PRESERVE=keyword
       /PRESERVE=SIGNATURE

    /PRESERVE=SIGNATURE maintains the existing GUID disk signature
    value. The default is to generate a new signature for the target
    volume.

    SIGNATURE is the only keyword currently supported.