mmscd(1M)                                                            mmscd(1M)



NAME
     mmscd - communicates with MMSC (including front panel display) on
     Origin2000 and Onyx2 rack systems

SYNOPSIS
     /usr/etc/mmscd  [ -f sdev ] [ -c cdev ]
                     [ -b baud ] [ -u freq ]
                     [ -t "title" ] [ -N cpus ] [ -D fctr ]
                     [ -gdmnG ]

DESCRIPTION
     mmscd is a daemon run by /etc/rc2.d/S33sn0start.  It handles all
     necessary communications with an Origin2000 system's Multi-Module System
     Controller (MMSC).  An MMSC is usually connected to systems composed of
     more than one module (one or more racks).

     The MMSC controls power sequencing and fan speed, monitors system
     sensors, and drives the LCD front panel.  mmscd works with the MMSC to
     run the CPU activity meter on the front panel, perform controlled normal
     or emergency system shutdowns, and handle warning and alarm messages from
     the system controller.

     Only one mmscd can run as a daemon at a time, and it must be run as root.
     After mmscd is started, it probes the console device to determine if an
     MMSC is present, and if not, it exits.

     The options are:

     -f sdev
          Specifies the name of a non-console serial device to which the MMSC
          is attached, in the case where it is not connected directly to the
          console port /dev/ttyd1. This can be used to test the graph display
          without multiplexing MMSC control through the console.

     -c cdev
          Specifies the name of a console serial device to which the MMSC is
          attached.  This defaults to /dev/console on non-graphics systems,
          but must be /dev/ttyd1 on graphics systems.

     -b baud
          Specifies a baud rate to use other than the default, whether the
          MMSC is attached to the console or to a different serial device.

     -g   Graceful powerdown mode causes mmscd to handle shutdowns by sending
          a hang-up signal to all processes, waiting two seconds, sending a
          kill signal to all processes, syncing all disks, and then powering
          the system down.

     -d   Debug mode mmscd displays debugging information relating to
          transactions with the MMSC.





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mmscd(1M)                                                            mmscd(1M)



     -m   CPU meter mode causes performance information to be displayed on a
          bar graph on the MMSC LCD panel.  When the default console device is
          used for MMSC communications, this data may have an impact on
          console performance, depending on the amount of data and meter
          update rate.

     -u freq
          Sets CPU meter update frequency in Hz.  The default is chosen so as
          to use at most 25% of available console bandwidth.

     -D fctr
          Sets CPU meter bar decay (smoothing) factor as a multiplier per
          second.  The default is 0.25.

     -t title
          Sets the title string at the top of the CPU meter display.  The
          default is "Origin2000 System Activity."

     -N cpus
          Causes mmscd to pretend there are a different number of CPUs than
          there actually are when drawing the CPU meter.  This is used to test
          the CPU meter.

     -n   Prevents mmscd from forking into the background when it starts,
          which is useful for debugging.

     -G   Include graphics information in CPU meter.  Causes systems which
          have graphics support to include an additional bar graph color to
          indicate the amount of time the CPUs are spending waiting on
          graphics.

CABLING
     The multi-module rack system must be cabled according to the instructions
     in the user guide.  If the cabling is incorrect, mmscd exits within 3
     seconds of being started because the MMSC cannot be contacted.

     Briefly, the ttyd1 serial port is connected to the MMSC BaseIO port (COM
     4) using a DB-9 to DIN-8 cable.  The ttyd1 port is the right-most BaseIO
     serial port on the master module.  The master module is the one whose
     four-character LED display has a "c" next to the module number.

     The system console is accessed by connecting a terminal to the Console
     port (COM 1) on the MMSC.  If connected properly, the MMSC will respond
     with the prompt "MMSC>" when Control-T is typed on the terminal.

     On systems with MMSC firmware earlier than version 1.1, it may be
     necessary to enable the MMSC to talk.  On the MMSC console, type
     Control-T to get the MMSC prompt, and enter com 4 to list port settings.
     Check the output for oob y. If you see oob n, then type Control-T and
     enter com 4 oob y.





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mmscd(1M)                                                            mmscd(1M)



     To try starting mmscd again, run /etc/init.d/sn0start start.

DIAGNOSTICS
     mmscd writes messages into /var/adm/syslog to indicate abnormal
     conditions, such as when the connection to the MMSC is lost, or mmscd is
     killed.

     If mmscd exits within 3 seconds of being started, there is a problem with
     the communications path (refer to CABLING above).

SEE ALSO
     syslog(3C).











































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