Creates a file that can be used as a paging, swapping, or dump file.
  Normally, this command is used indirectly by executing the command
  procedure SYS$UPDATE:SWAPFILES.

  Format:

    CREATE file-spec /SIZE=block-count

Additional information available:

Qualifiers

Additional information available:

/CONTIGUOUS/SIZE

 /CONTIGUOUS
 /NOCONTIGUOUS (Default)

  Specifies the created file is either to be contiguous (/CONTIGUOUS)
  or contiguous-best-try (/NOCONTIGUOUS). You must specify /NOCONTIGUOUS
  if you are creating a secondary page or swap file that spans volumes
  in a volume set.

 /SIZE=block-count

  Specifies the size in blocks of the file to be created.