1-2 Sun Netra T5220 Server Service Manual • January 2012
Conduct a visual inspection of the server internals and its components. Remove the
top cover and physically reseat the cable connections, the PCI cards, and the
FB-DIMMs. See:
■ Section 2.3, “Prerequisite Tasks for Component Replacement” on page 2-3
■ Section 4.2, “Replacing PCI-X, PCIe/XAUI Cards” on page 4-2
■ Section 4.6, “Replacing FB-DIMMs” on page 4-23.
If performing these tasks is not successful, then continue to Section 1.2, “Server
Diagnostics Overview” on page 1-2.
1.2 Server Diagnostics Overview
There are a variety of diagnostic tools, commands, and indicators you can use to
monitor and troubleshoot a server:
■ LEDs – These indicators provide a quick visual notification of the status of the
server and of some of the FRUs.
■ Fault management architecture – FMA provides simplified fault diagnostics
through use of the /var/adm/messages file, the fmdump command, and a Sun
Microsystems web site.
■ ILOM firmware –This system firmware runs on the service processor. In addition
to providing the interface between the hardware and OS, ILOM also tracks and
reports the health of key server components. ILOM works closely with POST and
Solaris Predictive Self-Healing technology to keep the system up and running
even when there is a faulty component.
■ Power-on self-test (POST) – POST performs diagnostics on system components
upon system reset to ensure the integrity of those components. POST is
configurable and works with ILOM to take faulty components offline if needed.
■ Solaris OS Predictive Self-Healing (PSH) – This technology continuously
monitors the health of the CPU and memory, and works with ILOM to take a
faulty component offline if needed. The Predictive Self-Healing technology
enables Sun systems to accurately predict component failures and mitigate many
serious problems before they occur.
■ Log files and console messages – These provide the standard Solaris OS log files
and investigative commands that can be accessed and displayed on the device of
your choice.
■ SunVTS™ – An application that exercises the system, provides hardware
validation, and discloses possible faulty components with recommendations for
repair.
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