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##### Diagnostics Overview

You can use a variety of diagnostic tools, commands, and indicators to monitor and troubleshoot a server. See the service manual for your server for complete information about these diagnostic tools:

- LEDs – Provide a quick visual notification of the status of the server and of some of the FRUs.

- Oracle ILOM – This firmware runs on the SP. In addition to providing the interface between the hardware and OS, Oracle ILOM also tracks and reports the health of key server components. Oracle ILOM works closely with POST and Oracle Solaris Predictive Self-Healing technology to keep the server running even when there is a faulty component.

- Power-on self-test – POST performs diagnostics on server components upon server reset to ensure the integrity of those components. POST is configureable and works with Oracle ILOM to take faulty components offline if needed.

- Oracle Solaris OS Predictive Self-Healing – This technology continuously monitors the health of the CPU, memory, and other components, and works with Oracle ILOM to take a faulty component offline if needed. The PSH technology enables servers to accurately predict component failures and mitigate many serious problems before they occur.

- Log files and command interface – Provide the standard Oracle 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 server, provides hardware validation, and discloses possible faulty components with recommendations for repair.

The LEDs, Oracle ILOM, PSH, and many of the log files and console messages are integrated. For example, when the Oracle Solaris software detects a fault, it displays the fault, and logs it, and passes information to Oracle ILOM, where it is logged.

##### Related Information

- Discover Faults (Oracle ILOM)

- Discover Faults Using POST

- Discover Faults (Oracle ILOM Fault Management Shell)

- See the server service manual section detecting and managing faults

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