Service processor initialization

The service processor runs on its own power boundary and continually monitors hardware attributes and the environmental conditions within the server.

Functions performed

The service processor runs on its own power boundary and continually monitors hardware attributes and the environmental conditions within the server. The service processor is controlled by firmware and does not require an operating system to be running to perform its tasks.

When external power is applied to the system, the service processor is activated. The service processor does the following:

Runs diagnostic routines to verify its hardware and firmware.
Gathers vital product data (VPD) from the electronic components in the server.

When the service processor has successfully completed these tasks, it is in the standby state. The control panel displays 01. You can now power up the server.

When you power on the server using the power button on the control panel, the Advanced System Management Interface (ASMI), or the Hardware Management Console (HMC), the service processor turns on the system power. The service processor does the following:

Runs diagnostic routines to verify the operation of the system processor and system memory.
Verifies that it can communicate with the environmental sensors and monitors in the system.

When the service processor completes these diagnostics, it turns control over to a system processor. Server firmware starts executing on the system processor.

Abnormal ending

The service processor ends an IPL when a condition is detected that prevents the base machine from functioning. If an IPL stops, an SRC appears on the control panel, and the system attention light goes on. The SRC indicates the failing condition.