Service Processor Board; Clock Boards; Power Bay Unit - NEC Express5800 1160Xd User Manual

Installation of a board in a particular slot and with other boards can determine the actual
operating frequency of a board within a bus group. See Chapter 5, "I/O Board
Installation" for information about installing a board in a particular slot for optimum
operation.
A DVD-ROM drive is installed in the Core Unit as standard equipment. Optionally, a
DAT tape drive or USB FDD and up to 6 disk storage hard disk drives may be added to
the PCIX Unit. See Figure 1-5.

Service Processor Board

The Service Processor Board (iSP Board) controls power and monitors status of all
components (see Figure 1-2 and 1-3). The board uses a PowerPC chip as the processor
for iSP, memory, LAN, and serial interface functionality. The Service Processor Board
performs initialization of the system, RAS functions, diagnostic functions, and failure
management of the system.
The 16-way and 32-way servers each have two Service Processor Boards (one for
redundancy).

Clock Boards

The 16-way and 32-way servers each have two Clock Boards for clock generation and
distribution. One of the Clock Boards provides redundancy.

Power Bay Unit

Up to 6 Distributed Power Supply Modules can be installed in each Power Bay Unit.
Power Bay Units can be installed as follows:
!
16-Way Server – one unit is installed in the main cabinet; two units can be
installed for AC redundancy.
!
32-Way Server – two units are installed in the main cabinet; three units can be
installed for AC redundancy.
!
I/O Expansion Cabinet – one unit is installed in the cabinet; two units can be
installed for AC redundancy.
System Overview 1-11