Chapter 6. Cluster installation 97
Confirm you can now ping the switch by name and IP address from the master
node. If you wish to do additional configuration, you may do it through the units
Web interface, consult the manual that came with the APC switch, or download it
from (Support -> User Manuals -> Power Distribution ->
AC Power Controllers).
6.1.5 BIOS and firmware updates
For consistency, all cluster nodes of the same model should have the same
version of the BIOS installed. These BIOS files can be downloaded from the IBM
Support Web site This site is shown in
Figure 4-1 on page 44. Enter your model number and select Dowloadable Files
from the menu on the left-hand side. You will also find the latest firmware updates
for all the other components in all your nodes, such as the ServeRAID adapter,
the RSA card, and so on. You can download a complete System Service
Package CD-ROM image containing all the images for your node type, or
individual images for each firmware element (BIOS, onboard diagnostics, etc).
Check to see if individual images have been updated since the System Service
Package, and download those components separately. Follow the instructions
provided with the images to create and run the updates. Note that you can
modify the BIOS flash diskette to run in unattended mode by changing the
CONFIG.SYS file to read:
(The readme file on the diskette may provide incorrect instructions for this).
Tip: If the availability of outlets requires you to plug the network switch into the
APC MasterSwitch, you should consider configuring that port to Never Off, in
order to avoid turing off the network switch and loosing access to the APC
MasterSwitch over the network. Should this happen, you can recover by using
the serial terminal connection as previously described.
Attention: If it becomes necessary to replace the system board on one of
your nodes, check the BIOS level of the replacement board before re-flashing.
Although it is desirable to maintain a common BIOS level on all nodes, you
should never attempt to load an older BIOS version than what is provided on a
replacement board unless you are explicitly instructed to do so by IBM
98 Building a Linux HPC Cluster with xCAT
After flashing your components you have to update the BIOS settings. BIOS
configuration is accomplished using the BIOS setup program, which is started by
pressing the F1 key on the keyboard when the node is powered on. To be sure
you have consistent settings, start by resetting to default, then change the
settings where a non-default value is needed. The settings we used (with the
values emphasized) are:
򐂰 Under Devices and I/O Ports:
Serial Port A Port 3F8, IRQ 4
Serial Port B Disabled
Under Remote Console Redirection:
Port COM1
Baud Rate 9600
Data Bits 8
Parity None
Stop Bits 1
Emulation ANSI
Active After Boot
򐂰 Under Start Options:
Boot Fail Count
Virus Detection Disabled
Under Startup Sequence:
First Startup Device
Diskette Drive 0
Second Startup DeviceCD ROM
Third Startup Device Network
Fourth Startup Device Hard Disk 0
Note: The example above is for the 8674 model of the x330. Other models
may have slightly different prompt sequences.

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