Sun Microsystems 6.0005E+11 manual SBus Modules, CPU Modules, Filler Panels and Load Boards

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3.Under some circumstances, you may remove a power/cooling module from an active system for a short time. However, if the boards in the adjacent slots create large quantities of heat, it is safer to halt and power off the system first.

C.1.5 Filler Panels and Load Boards

1.All empty board slots must be filled with filler panels or load boards. For Enterprise 6000 systems, use load boards. (Requirement) A load board (part number 501-3142) is identified by the presence of connector sockets and passive circuitry, which reduces electrical noise at the center plane. Do not substitute filler panels, which do not have load circuits.

2.For Enterprise 5000 and 4000 systems, use filler panels (part number 540- 2592). (Requirement)

3.Filler panels are required for all unused PCM bays. (Requirement)

C.2 SBus Modules

1.Install double-wide SBus cards only on the SBus I/O board, at SBus slots 1 and 2. The location of SBus slot 0 prevents its use with double-wide cards.

2.Double-wide SBus cards cannot be used with the Graphics I/O board. The middle card connector does not fit SBus cards.

C.3 CPU Modules

1.Each CPU/Memory board has two sets of CPU connectors, marked “PROC 0” and “PROC 1”.

2.Do not mix CPU speeds—all CPUs run at the lowest common frequency.

3.To run 250 MHz CPU modules, the following are requirements:

a.The system must have clock board part number 501-4286.

b.The system must not have 250 MHz CPU modules with CPU modules of a different speed.

Rules for System Configuration C-3