System Control - Silicon Graphics Origin 3900 User Manual

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Chapter 8

System Control

The Origin 3900 server has two levels of control, as follows:
• L1 controller. The L1 controller is a brick-level controller. All Origin 3900 bricks
have an L1 controller with the exception of the TP900 and D-brick2 storage
modules. The functionality of the L1 controller varies slightly by brick.
• L2 controller. The L2 controller is a rack-level controller for racks that contain
Cx-bricks and/or R-bricks. The L2 controller allows remote maintenance, controls
resource sharing, controls the L1 controllers in the system, and maintains controller
configuration and topology information between itself and other L2 controllers.
The L1 controllers, which are located within the bricks, are slave devices to the L2
controller.
Note: The D-brick2, which is not monitored by the L2 controller, has its own ESI/ops
panel module with a microcontroller for monitoring and controlling all elements of the
D-brick2.
This chapter describes the functions of system controllers, in the following sections:
• "L1 Controller" on page 106
• "Operating L1 Controller" on page 110
• "L2 Controller" on page 116
• "Operating L2 Controller" on page 132
• "Upgrading L1/L2 Firmware" on page 142
• "Identifying Bricks" on page 144
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