Chapter 3. System Operation

This chapter describes some basic system operations using the chassis manager controller (CMC) commands and covers the following topics:

SGI Altix UV System Control Network

SGI Management Center (SMC) software running on the system management node (SMN) provides a robust graphical interface for system configuration, operation, and monitoring. For more information, see SGI Management Center System Administrator's Guide.

The SGI Altix UV 1000 and Altix UV 100 system control network is a private, closed network. It is not to be reconfigured in any way different from the standard UV installation, nor is it to be directly connected to any other network. The Altix UV system control network does not accommodate additional network traffic, routing, address naming other than its own schema, and DCHP controls other than its own configuration. The system control network also is not security hardened, nor is it tolerant of heavy network traffic, and is vulnerable to Denial of Service attacks. The system management node acts as a gateway between the UV system control network and any other networks. For more information on the SGI Altix UV system control network, see the SGI Altix UV 100 System User's Guide or the SGI Altix UV 1000 System User's Guide.

Connecting to the UV System Controller Network Using the CMC

The Altix UV software controller is designed to manage and monitor the individual blades in SGI Altix UV systems. Depending on your system configuration, you can monitor and operate the system from the system management node (SMN) or on smaller systems, such as, the Altix UV 100 from the CMC itself. UV 1000 systems up to 16 racks (four building blocks, also called one super block) can also be controlled and monitored from a CMC in the system. For more information, see the “Connecting to the UV System Controller Network” in the SGI Altix UV CMC Controller Software User's Guide.

Power on and Booting an Altix UV System from Complete Power Off

To boot an SGI Altix UV 1000 or UV 100 system from complete power off, perform the following steps:

  1. Make sure the power breakers are on.

  2. Establish a serial connection to the CONSOLE on the CMC or establish a network connection to the CMC. For a network connection, your PC must be connected to the CMC (via the network connection) and have its /etc/hosts file setup to include the CMCs. See “Connecting to the UV System Controller Network Using the CMC”.

  3. ssh root@hostname-cmc
    SGI Chassis Manager Controller, Firmware Rev. 0.0.22
    
    CMC:r1i1c>  

    Typically, the default password set out of the factory is root. The CMC prompt appears. CMC:r1i1c refers to rack 1, IRU 1, CMC.

    If the host name is not set up in the PC/workstation's hosts file, you can simply use the IP address of the CMC, as follows:

    ssh root@<IP-ADDRESS>

  4. Power up your Altix UV system using the power on command, as follows:

    CMC:r1i1c> power on


    Note: You can open a second window on the CMC, ssh root@hostname-cmc and use the uvcon command to open a console and watch the system power on.


  5. Open a second console to the CMC using the uvcon command to see the system power on, as follows:

    ssh root@hostname-cmc
    SGI Chassis Manager Controller, Firmware Rev. 0.0.22
    
    CMC:r1i1c> uvcon
    uvcon: attempting connection to localhost...
    uvcon: connection to SMN/CMC (localhost) established.
    uvcon: requesting baseio console access at r001i01b00...
    uvcon: tty mode enabled, use 'CTRL-]' 'q' to exit
    uvcon: console access established
    uvcon: CMC <--> BASEIO connection active
    ************************************************
    *******  START OF CACHED CONSOLE OUTPUT  *******
    ************************************************
    
    ******** [20100512.143541] BMC r001i01b10: Cold Reset via NL broadcast reset
    ******** [20100512.143541] BMC r001i01b07: Cold Reset via NL broadcast reset
    ******** [20100512.143540] BMC r001i01b08: Cold Reset via NL broadcast reset
    ******** [20100512.143540] BMC r001i01b12: Cold Reset via NL broadcast reset
    ******** [20100512.143541] BMC r001i01b14: Cold Reset via NL broadcast reset
    ******** [20100512.143541] BMC r001i01b04: Cold Reset via NL 


    Note: Use CTRL-] q to exit the console.


  6. Depending upon the size of your system, in can take 5 to 10 minutes for the Altix UV system to power on. When the shell> prompt appears, enter fs0, as follows:

    shell> fs0

  7. At the fs0 prompt, enter boot, as follows:

    fs0> boot

    ELILO Linux Boot loader is called and various SGI configuration scripts are run and the SUSE Linux Enterprise Server 11 SP1 installation program appears.

Power off an Altix UV System

To power down the Altix UV sytem, use the power off command, as follows:

CMC:r1i1c> power off
==== r001i01c (PRI) ====

You can use the power status command, to check the power status of your system, as follows:

CMC:r1i1c> power status
==== r001i01c (PRI) ====
on: 0, off: 32, unknown: 0, disabled: 0

Power NMI to Drop into KDB

To send a nonmaskable interrupt (NMI) signal from the power command to the CMC to drop into the kernel debugger (KDB), use the power nmi command, as follows:

CMC:r1i1c> power nmi

Entering kdb (current=0xffff8aa3fe11c040, pid 0) on processor 7 due to NonMaskable Interrupt @ 0xffffffff8100ad42
     r15 = 0x0000000000000000      r14 = 0x0000000000000000
     r13 = 0x0000000000000000      r12 = 0x0000000000000000
      bp = 0xffffffff81927380       bx = 0xffff8ac1ff11dfd8
     r11 = 0xffffffff8101a2c0      r10 = 0xffff88000beefd18
      r9 = 0x00000000ffffffff       r8 = 0x0000000000000000
      ax = 0x0000000000000000       cx = 0x0000000000000000
      dx = 0x0000000000000000       si = 0xffff8ac1ff11dfd8
      di = 0xffffffff81a2b308  orig_ax = 0xffffffffffffffff
      ip = 0xffffffff8100ad42       cs = 0x0000000000000010
   flags = 0x0000000000000246       sp = 0xffff88000bee7ff0
      ss = 0x0000000000000018 &regs = 0xffff88000bee7f58
[7]kdb>
 

Upgrading System BIOS

To upgrade the compute blade PROM, perform the following steps:

  1. From the CMC prompt, to show the current PROM level, perform the folllowing command:

    CMC:r1i1c> showbios
    Flashed on Sat May  1 14:14:45 UTC 2010 was bios.latest.fd (20100429_1603)

  2. Get the newest PROM image from SupportFolio Online at http://support.sgi.com/ .

  3. Copy the latest BIOS to a directory on the CMC in /work/bmc/common/ An example directory is, as follows:

    CMC:r1i1c> ls
    bios.latest.fd flashbios

  4. Use the flashbios command to flash the compute blade BIOS, as follows:

    CMC:r1i1c> flashbios
    Using default bios: bios.latest.fd
    Checking processor status on all nodes....
    Done. System is read for BIOS flash update
    Flashing bios bios.lastest.fd (20100429_1603) This will take several minutes.
    ...

For more information on using CMC software, see the SGI Altix UV CMC Controller Software User's Guide.