/CONTIGUOUS
       /NOCONTIGUOUS

    Specifies that the created file is either to be contiguous
    (/CONTIGUOUS) or contiguous-best-try (/NOCONTIGUOUS). The
    Primitive File System used during OpenVMS bootstrap restricts all
    files used during the early bootstrap process to have a one-block
    file header. Because of this restriction, OpenVMS cannot be
    reliably bootstrapped from a bound volume set and is not
    supported on a bound volume set. For best performance, VSI
    recommends that page, swap, and dump files be contiguous.