CPU module

(CPUM) A module containing one or two CPU chip(s).

crossbar (XB) The switch ASIC that controls the transfer of data between the System Controller (SC) and the I/O.

Crossbar unit (XBU) The board that mounts the crossbar large-scale integration (XB ASICs). The crossbar unit is used in the SPARC Enterprise M9000 model. In the SPARC Enterprise M9000 with Expansion Cabinet model, the cable among crossbar units connect each chassis.

D

dual power feed Type of power feed for the high-reliability system that contains dual lines of power supply. If one line has stopped, the other line does not stop and enables the system to continue operation.

dynamic

reconfiguration (DR) Enables logical attachment and detachment of system boards to and from the system without causing system downtime. This is the process of physically installing or removing a system board while the Solaris OS is running.

Enables boards to be electrically isolated (deleteboard) from a domain so they can be physically removed from the system or added to a different domain; or to be electrically reattached (addboard) so they can be inserted into a running server or assigned to a different domain.

E

ECC Error Correction Code.

eXtended system board

(XSB) eXtended System Board combines the hardware resources of a physical system board. The SPARC Enterprise servers can generate one or four XSB(s) from one physical system board: Uni-XSB and Quad-XSB.

eXtended System

Control Facility

(XSCF) The software that runs on the Service Processor and provides control and monitoring functions for the server.

Glossary-2SPARC Enterprise M8000/M9000 Servers Overview Guide • April 2007