IBM BladeCenter S Problem Determination And Service Manual page 44

v From the advanced management module command-line interface, enter the
Working with the event log
When attempting to resolve problems using the messages in the event log, review
messages with earlier timestamps before taking action on more recent messages.
For example, an error message about a failing component with a recent timestamp
may be related to an error message about the prior failure of another component.
When a message identifies a problem with a specific device within the BladeCenter
S system, check the LEDs on that device for additional troubleshooting
information.
Watchdog timeout messages
Watchdog timeout messages are displayed in the advanced management module
event log. They can occur any time a hardware or software problem causes a CPU
on the blade server to become nonresponsive.
Each blade server has a service processor (called a Baseboard Management
Controller or BMC) that operates independently of the CPUs on the blade server. It
runs whenever the blade server is installed in the BladeCenter S system and
connected to active power supplies; the blade server does not need to be powered
on.
The service processor communicates with the advanced management module to
provide vital product data (VPD) and health status about the blade server. In
addition, the service processor is used to perform tasks such as powering on,
powering off, and restarting the blade server when you remotely manage the blade
server through the advanced management module.
The service processor uses timers, called watchdog timers, to measure blade server
events:
v The BIOS or POST watchdog timer triggers a watchdog event if the blade server
v The OS watchdog timer triggers a watchdog event if the blade server becomes
30
BladeCenter S Type 7779/8886: Problem Determination and Service Guide
For more information about the advanced management module Web interface,
see the Advanced Management Module User's Guide.
displaylog command.
For more information about the advanced management module command-line
interface, see the Advanced Management Module Command-Line Interface Reference
Guide.
becomes nonresponsive during the POST process.
nonresponsive during the starting of the operating system.
Note: The Automatic Server Restart (ASR) driver must be installed on the blade
server. This driver communicates with the blade service processor and keeps the
watchdog timer from counting down to 0 as long as the system processor is still
running. To find this driver, complete the following steps:
1. Go to http://www.ibm.com/systems/support/.
2. Under Product Support, click BladeCenter.
3. Under Popular links, select Software and device drivers.
4. Under BladeCenter device driver file matrices, select the appropriate blade
server. The ASR driver is typically listed under Advanced Systems
Management.