o  robot_name - The name of the robot device to be opened. On
       Digital UNIX, if the leading character of the name is not a
       slash (/), /dev/ will be prepended to the name.

    o  robot_info - This is the address of a robot_info_t structure
       initialized using mrd_startup(3mrd) or mrd_show(3mrd). This
       data structure contains the element starting address and
       counts for each type of element, which are needed to map an
       absolute element to the correct zero relative address and
       type.

    o  element_type - The type of robot element on which the
       operation takes place. If an element type of zero (0) is used,
       all elements will be searched starting at element 0 of each
       type and searching all the elements of that type on the robot.
       The order of this search is Slot, Drive, Transport and finally
       Ports.

    o  element_name - A string used to specify the name of the first
       element about which to obtain information. While SCSI devices
       use integer numbers for element addresses, DSA robots use
       character strings. This allows the same interface to be used
       for both types, where supported.

    o  element_count - A volume tag search in a large library
       can take a long time. Some applications (a graphic user
       interface for example) may want to break up a large search
       into smaller, quicker sub-searches. When a specific element_
       type is specified only a range specified by the element_name
       and element_count will be searched. This argument is ignored
       when the element_type is zero (0).

    o  element_info - The array of element_info_t structures that is
       filled in with information on the type and number of elements
       requested with element_type and element_count. The information
       includes volume tag (if available), state, port type (if PORT
       information is requested), status, and when available a copy
       of the Read Element Status data for the element.

    o  log_info - This is a character array that should be at least
       MRD_MAX_LOG_STRING in length. If this function fails as the
       result of a SCSI error, this will be filled with the formatted
       request sense data. If this function fails as the result
       of an operating system error, the operating system message
       particular to the error will be copied into the array.