VMS Help MONITOR, MONITOR, DISK  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The MONITOR DISK command initiates monitoring of the DISK
    statistics class. The maximum number of disks that can be
    monitored for record output is 909, and for display and summary
    output is 1817.

    Format

      MONITOR DISK

  Additional Information (explode) :

• Classname Qualifiers