Allows you to modify the path and unit number of a device in the
    permanent list. The changes take place immediately.

    Requires SYSPRV privilege.

    Format

      MODIFY DEVICE  device-name:

1  –  Parameter

 device-name:

    The name of the device whose characteristics are to be modified.
    The device name has the form ddcu,

    where:

    dd    is the device code-for example, LP. (The driver name
          corresponds to the device code; in this case, the driver
          name would be SYS$LPDRIVER.)

    c     is the controller designation A through Z; unless UCM
          specifies a different letter, all USB devices are A.

    u     is the unit number (0 through 9999).

    OpenVMS device names are made up of the two-character device
    code, followed by the controller designation, the unit number
    (which can be 1 to 4 characters long), and, finally, a colon (:).

2  –  Qualifiers

2.1    /BUS_NUMBER

       /BUS_NUMBER=number

    Specifies the USB bus number of the device. This parameter is
    required to identify a particular device on a system that has
    multiple USB buses. If you do not use this qualifier, the bus
    number defaults to zero.

    The number can be any number from 0 through 25.

2.2    /PATH

       /PATH=(n1[.n2.n3.n4.n5.n6])

    Specifies the path to the device on the bus. The path is used
    to uniquely identify a device if the device does not have a
    serial number. The path specification is a series of six or fewer
    numbers,

    where:

    n1               is the number of the root hub (at tier 0).

    n2 through n6    are port numbers for downstream hubs at tiers 1,
                     2, 3, 4, and 5.

    For example, /PATH=1.4.3 indicates that the device is in turn
    plugged into port 3 of the second tier, which is plugged into
    port 4 of the first tier, which in turn is plugged into the root
    hub 1.

2.3    /UNIT_NUMBER

       /UNIT_NUMBER=number

    Unit numbers can be between 0 and 9999. By default, the
    configuration code selects the next available unit number. This
    qualifier allows you to change the unit number to suit your
    needs.

3  –  Example

  $  UCM
  Universal Serial Bus Configuration Manager, Version V1.0

  UCM> SHOW DEVICE /UNCONFIGURED

  DEVICE
  DEVICE_TYPE                     TENTATIVE
  DEVICE_NAME_ROOT                AGA
  UNIT_NUMBER                     0
  BUS                             1
  PATH                            1.0.0.0.0.0
  END_DEVICE

  UCM> ADD DEVICE AGA0:

  UCM> MODIFY DEVICE AGA0:/UNIT=9999

  UCM> SHOW DEVICE /PERMANENT /FULL AGA9999:

  DEVICE
  DEVICE_TYPE                     PERMANENT
  DEVICE_NAME_ROOT                AGA
  UNIT_NUMBER                     9999
  DRIVER                          SYS$AGDRIVER.EXE
  BUS_NUMBER                      1
  PATH                            1.0.0.0.0.0
  HID_USAGE_DATA                  65540
  BEGIN_INTERFACE
  HID_USAGE_DATA                  65540
  END_INTERFACE
  END_DEVICE

  UCM>

      The first SHOW DEVICE command displays information from the
      generic list about the unconfigured AG device. The ADD DEVICE
      command adds the device to the permanent list, and the MODIFY
      DEVICE command changes the unit number of the device. The
      second SHOW DEVICE command displays this change.