Sun Microsystems T1000 Reasons to Run POST

Chapter 2 Sun Fire T1000 Server Diagnostics 31

Reasons to Run POST

Youcan use POST for basic sanity checking of the server hardware and for

troubleshooting as described in the following sections.

Routine Sanity Check of the Hardware

POST tests critical hardware components to verify functionality before the system

boots and accesses software. If POST detects an error,the faulty component is

disabled automatically,preventing faulty hardware from impacting system

operation.

Under normal operating conditions, the server is usually configured to run POST

maximum mode for all power-on or error-generated resets.This enables the system

to initialize quickly,and still have hardware checkups to ensure a healthy system.

Diagnosing the System Hardware

Youcan use POST as an initial diagnostic tool for the system hardware. In this case,

configure POST to run in diagnostic service mode for maximum test coverage and

verbose output.

▼To Run POST

This procedure describes how to run POST when you want maximum testing, as in

the case when you are troubleshooting a system.

1. Switch from the system console prompt to the SC console prompt by issuing the #.

escape sequence and type the command setsc diag_mode normal.

2. Set the virtual keyswitch to diag so that POST will run in service mode.

ok #.

sc> setsc diag_mode normal

sc> setkeyswitch diag

Contents

Main Please Recycle Contents Page Page Page Preface How This Book Is Organized Using UNIX Commands Typographic Conventions Shell Prompts Youcan view and print the following documents from the Sun documentation web Sun Fire T1000 Server Documentation AaBbCc123 Accessing Sun Documentation Third-Party WebSites Page Page Sun Fire T1000 Server Overview Sun Fire T1000 Server Features Chip-Multitheaded (CMT) Multicore Processor and Memory Technology Performance Enhancements Remote Manageability With ALOM Ethernet RJ45s includes two LEDs: System Reliability, Availability, and Serviceability Environmental Monitoring Error Correction and Parity Checking Advanced ECC, also called Chipkill, detects up to 4-bits in error. Predictive Self-Healing Chassis Identification Additional Service Related Information Page Sun Fire T1000 Server Diagnostics Overview of Sun Fire T1000 Server Diagnostics Page Page Page Page Using LEDs to Identify the State of Devices The Sun Fire T1000 server provides the following groupsof LEDs: These LEDs provide a quick visual check of the state of the system. AC OK LED Page Front and Rear Panel LEDs Power On/Off button on the rear panel. Power Supply LEDs The power supply LEDs (TABLE2-3) are located on the back of the power supply. Using ALOM For Diagnosis and Repair Verification Note Running ALOM Service-Related Commands Connecting to ALOM Note Switching Between the System Console and ALOM Period). Service-Related ALOM Commands Note To Run the showfaults Command any additional faults. To Run the showenvironment Command Note Page To Run the showfru Command Page Page Running POST Controlling How POST Runs how the variables work together. Page mode. To Change POST Parameters #. sc> setsc diag_mode service sc> setkeyswitch diag Reasons to Run POST Routine Sanity Check of the Hardware Diagnosing the System Hardware To Run POST 4. Switch to the system console to view the post output: Example of POST output: Page Page Note Using the Solaris Predictive Self-Healing Feature Note To Use the fmdump Command to Identify Faults Page Collecting Information From Solaris OS Files and Commands To Check the Message Buffer To View System Message Log Files Managing System Components with Automatic System Recovery Commands Note To Run the showcomponent Command To Run the disablecomponent Command To Run the enablecomponent Command Exercising the System with SunVTS Checking Whether SunVTS Software Is Installed To Check Whether SunVTS Software Is Installed Exercising the System Using SunVTS Software To Exercise the System Using SunVTS Software Page Page Page Page Page Removing and Replacing FRUs Note Safety Information Safety Symbols Caution Electrostatic Discharge Safety Caution Use an Antistatic Wrist Strap Common Procedures for Parts Replacement Required Tools To Shut the System Down Note To Remove the Server From a Rack To Perform Electrostatic Discharge (ESD) Prevention Measures To Remove the Top Cover Note Caution Removing and Replacing CRUs To Remove the Optional PCI Express Card Page To Add or Replace the Optional PCI Express Card Note To Remove the Fan Tray Assembly To Replace the Fan Tray Assembly To Remove the Power Supply To Replace the Power Supply To Remove the Hard Drive To Replace the Hard Drive To Remove DIMMs Caution To Add or Replace DIMMs Page Note To Remove the Motherboard and Chassis To Replace the Motherboard and Chassis Assembly To Remove the Clock Battery on the Motherboard Page Page Page Page Field-Replaceable Units (FRUs) .