Sun Microsystems Netra T5220, Service Manual

Page: 47 / 178

Chapter 1 Server Diagnostics 1-37
1.6 Using the Solaris Predictive Self-Healing
Feature
The Solaris Predictive Self-Healing (PSH) technology enables the server to diagnose
problems while the Solaris OS is running, and mitigate many problems before they
negatively affect operations.
The Solaris OS uses the fault manager daemon,
fmd(1M)
, which starts at boot time
and runs in the background to monitor the system. If a component generates an error,
the daemon handles the error by correlating the error with data from previous errors
and other related information to diagnose the problem. Once diagnosed, the fault
manager daemon assigns the problem a Universal Unique Identifier (UUID) that
distinguishes the problem across any set of systems. When possible, the fault
manager daemon initiates steps to self-heal the failed component and take the
component offline. The daemon also logs the fault to the
syslogd
daemon and
provides a fault notification with a message ID (MSGID). You can use the message ID
to get additional information about the problem from Sun’s knowledge article
database.
The Predictive Self-Healing technology covers the following server components:
■
UltraSPARC® T2 multicore processor
■
Memory
■
I/O bus
The PSH console message provides the following information:
■
Type
■
Severity
■
Description
■
Automated response
■
Impact
■
Suggested action for system administrator
If the Solaris PSH facility detects a faulty component, use the
fmdump
command to
identify the fault. Faulty FRUs are identified in fault messages using the FRU name.
For a list of FRU names, see
TABLE 2-1
.