Compaq GS80, GS160, GS320 manual System Control Manager Overview

8.2System Control Manager Overview

With the SCM, you can monitor and control the system (reset, power on/off, halt) without using the operating system. You can enter SCM commands at a local or remote console device. You also manage hard partitions using the SCM.

The SCM:

•Controls the control panel display and writes status messages on the display.

•Detects conditions that require alerts, such as excessive temperature, fan failure, and power supply failure. On detection, SCM displays messages on the OCP, pages an operator, and sends an interrupt to the SRM, which then passes the interrupt to the operating system or an application.

•Retrieves and passes information about a system shutdown to the SRM console at the next power-up. SRM displays a message regarding the last shutdown.

•Provides a command-line interface (CLI) for the user to control the system. From the CLI the user can power the system on and off, halt or reset the system, and monitor the system environment.

•Passes error log information to shared RAM so that this information can be accessed by the system.

•Handles power supply hot swap.

•Manages hard partitions using HP_* environment variables.

•Shared RAM on every standard I/O module in the system is kept coherent by the master SCM. This allows every SCM console and copy of the operating system in a hard-partitioned system to see the same configuration information.

8-4 AlphaServer GS80/160/320 User’s Guide