Sun Microsystems Enterprise 250 Owner's Manual page 63

Four Levels of Diagnostics
For enhanced serviceability and availability, the system provides four different levels
of diagnostic testing: power-on self-test (POST), OpenBoot diagnostics (OBDiag),
SunVTS™, and Solstice™ SyMON™.
POST and OBDiag are firmware-resident diagnostics that can run even if the server
is unable to boot the operating system. Application-level diagnostics, such as
SunVTS and Solstice SyMON, offer additional troubleshooting capabilities once the
operating system is running.
POST diagnostics provide a quick but thorough check of the most basic hardware
functions of the system. For more information about POST, see "About Power-On
Self-Test (POST) Diagnostics" on page 218 and "How to Use POST Diagnostics" on
page 219.
OBDiag provides a more comprehensive test of the system, including external
interfaces. OBDiag is described in "About OpenBoot Diagnostics (OBDiag)" on
page 223 and "How to Use OpenBoot Diagnostics (OBDiag)" on page 230.
At the application level, you have access to SunVTS diagnostics. Like OBDiag,
SunVTS provides a comprehensive test of the system, including its external
interfaces. SunVTS also allows you to run tests remotely over a network connection.
You can only use SunVTS if the operating system is running. For more information
about SunVTS, see "About SunVTS Software" on page 235, "How to Use SunVTS
Software" on page 238, and "How to Check Whether SunVTS Software Is Installed"
on page 237.
Another application-level program, called Solstice SyMON, provides you with a
variety of continuous system monitoring capabilities. It allows you to monitor
system hardware status and operating system performance of your server. For more
information about SyMON, see "About Solstice SyMON Software" on page 240.
Remote System Control (RSC)
Remote System Control (RSC) is a secure server management tool that lets you
monitor and control your server over modem lines or over a network. RSC provides
remote system administration for geographically distributed or physically
inaccessible systems. The RSC software works with the System Service Processor
(SSP) on the Enterprise 250 main logic board. The RSC and SSP support both serial
and Ethernet connections to a remote console.
Chapter 4 Hardware Configuration 45