Snapshots=(Allocation=n,File=file-spec)

    If you specify the Allocation parameter, specifies the snapshot
    file allocation size in n pages for a copied area. If you specify
    the File parameter, specifies a new snapshot file location for
    the copied storage area to which it is applied.

    You can specify the Allocation parameter only, the File parameter
    only, or both parameters; however, if you specify the Snapshots
    qualifier, you must specify at least one parameter.

    The Snapshots qualifier is a positional qualifier.

    See the Usage Notes for information on how this qualifier
    interacts with the Root, File, and Directory qualifiers.