Chapter 4 FRU Replacement Preparation 4-3
■ Hot replacement
A target FRU is operated while the domain to which the FRU belongs is stopped.
Depending on the target FRU, there are two cases as follows:
■ Power supply unit/Fan unit: operated with XSCF commands.
■ Hard disk drive: operated directly, not by using XSCF commands.
■ 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
Oracle Solaris OS, operate the target 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, MBU_A_5, MBU_A_6)
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
*
* The FRU is operated directly, without using XSCF commands.
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
†
† The FRU is operated with XSCF commands.
Yes
†
Chapter 12
Fan unit (FAN_A) Top Yes Yes
†
Yes
†
Chapter 13
Fan backplane (FANBP_B) Top Yes No No Chapter 14
Operator panel (OPNL) Front/top Yes No No Chapter 15
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