About Sun Remote Services Net Connect; About Configuring The System For Troubleshooting; Hardware Watchdog Mechanism - Sun Microsystems Sun Fire V445 Server Administration Manual

About Sun Remote Services Net Connect

Sun Remote Services (SRS) Net Connect is a collection of system management
services designed to help you better control your computing environment. These
Web-delivered services enable you to monitor systems, to create performance and
trend reports, and to receive automatic notification of system events. These services
help you to act more quickly when a system event occurs and to manage potential
issues before they become problems.
More information about SRS Net Connect is available at:
http://www.sun.com/service/support/srs/netconnect
About Configuring the System for
Troubleshooting
System failures are characterized by certain symptoms. Each symptom can be traced
to one or more problems or causes by using specific troubleshooting tools and
techniques. This section describes troubleshooting tools and techniques that you can
control through configuration variables.

Hardware Watchdog Mechanism

The hardware watchdog mechanism is a hardware timer that is continually reset as
long as the OS is running. If the system hangs, the OS is no longer able to reset the
timer. The timer then expires and causes an automatic externally initiated reset
(XIR), displaying debug information on the system console. The hardware watchdog
mechanism is enabled by default. If the hardware watchdog mechanism is disabled,
the Solaris OS must be configured before the hardware watchdog mechanism can be
reenabled.
The configuration variable error-reset-recovery allows you to control how the
hardware watchdog mechanism behaves when the timer expires. The following are
the error-reset-recovery settings:
boot (default) – Resets the timer and attempts to reboot the system.
sync (recommended) – Attempts to automatically generate a core dump file
dump, reset the timer, and reboot the system.
Chapter 9 Troubleshooting 227