Sun Microsystems SPARC Series, Service Manual

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C-2 SPARC Enterprise M3000 Server Service Manual • January 2009
C.2 Motherboard Unit
The motherboard unit is the main circuit board of the M3000 server. The following
components connect to the motherboard unit.
■
“Memory (DIMM)” on page C-3
■
“PCIe Slot” on page C-3
■
“CPU” on page C-4
■
“XSCF Unit” on page C-4
Power is supplied from the power supply units to the motherboard unit. To remove
and replace the motherboard unit, power off the server. The replacement work is
performed from the top of the server.
Because the CPU and the XSCF unit are connected directly to the motherboard unit,
neither of them can be replaced individually. There are two types of motherboard
units for the M3000 server: the motherboard unit mounted with the CPU consisting
of two-core processors and the motherboard unit mounted with the CPU consisting
of four-core processors. When replacing a motherboard unit, the replacement unit
must contain the same type of processor. For example, do not replace a motherboard
unit that has two-core processors with one that contains four-core processors.
For the replacement procedure, see Chapter 6 .
Power supply unit (PSU) Yes Yes Yes Yes
Fan unit (FAN_A) Yes Yes Yes Yes
Fan backplane (FANBP_B) No Yes
Operator panel (OPNL) No Yes
*
■
A redundant configuration is created with the hard disk drive only when the disk mirroring software is
used.
■
If a hard disk drive is an unmirrored boot device, it must be replaced by using the cold replacement proce-
dure. However, if a boot device can be disconnected by means of a Solaris OS function or disk mirroring soft-
ware function, active replacement can also be performed. The procedure for disconnecting a hard disk drive
varies depending on the software being used. For details, see the manuals for the relevant software.
TABLE C-1
FRU components (Continued)
Component Redundant
Cold
replacement Hot
replacement Active
replacement Cold
addition Hot
addition Active
addition