/LIMIT[=n]

    Specifies that the volume is to be enabled for volume expansion.
    n specifies the upper limit of the expansion (in blocks). If no
    value is specified, the maximum expansion potential is set up.

    The maximum expansion size depends on the cluster size defined
    for the volume using the INITIALIZE/CLUSTER_SIZE command. If
    the cluster size is 8 or more, the current maximum expansion
    supported on OpenVMS (1TB) is set up. If the cluster size is less
    than 8, the expansion limit is set to 65535*4096*Cluster-size
    because the maximum size of the bitmap is 65535 blocks. For more
    information about volume expansion, see the VSI Volume Shadowing
    for OpenVMS manual.

    This command must be executed while the disk is mounted
    privately.

    If you add additional physical storage in the future, you can use
    the /SIZE qualifier to increase the volume size.