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Chapter 4 FRU Replacement Preparation 4-3
■ Cold replacement
After all the domains are stopped and then the server is powered off, a FRU is
operated.
Note – Do not operate a target FRU while the OpenBoot PROM is running (the ok
prompt is displayed). After stopping the relevant domain (power-off) or starting the
Solaris OS, operate the target FRU.
4.2.2 FRU Installation
For empty slots without hard disk drives or PCIe cards, the number of mounted
FRUs can be changed from 1 to the maximum number as required. There are some
components that are tentatively mounted physically in the server. If such a
component is a hard disk drive, it is called an HDD dummy, and if such a
component is a PCIe card, it is called a PCIe slot cover. These components are
necessary to protect the server from noise and to properly cool the server.
The same methods as those used for replacement are used for installation.
Note – When installing a new component in an empty slot, remove the HDD
dummy or PCIe slot cover and then install a new FRU.
TABLE 4-2 lists the access locations and applicable replacement methods for each
FRU.
TABLE 4-2 FRU Access Locations and Replacement Methods
FRU
Access
location
Cold
replacement
Hot
replacement
Active
replacement
Where to find the
procedure
Motherboard unit
(MBU_A, MBU_A_2, MBU_A_3,
MBU_A_4)
Top Yes No No Chapter 6
Memory (DIMM) Top Yes No No Chapter 7
PCIe card (PCIe) Top Yes No No Chapter 8
Hard disk drive (HDD) Front Yes Yes
*
Yes
‡
Chapter 9
Hard disk drive backplane (HDDBP) Top Yes No No Chapter 10
CD-RW/DVD-RW drive unit
(DVDU)
Front/top Yes No No Chapter 11
Power supply unit (PSU) Rear Yes Yes
†
Yes
†
Chapter 12