Removal and replacement procedures 60
transient and soft uncorrectable errors, resulting in systems that maintain mirroring protection (and thus
improved uptime) unless there is a failure of both branches.
Mirrored memory FBDIMM configuration requirements (in addition to general configuration requirements):
• Banks A and B must be fully populated.
• Bank A and bank B must contain FBDIMMs with identical part numbers. If installed, bank C and
bank D must also contain FBDIMMs with identical part numbers.
When using mirrored memory mode, FBDIMMs must be populated as specified in the following table:
Configuration Bank A
1A and 3A
Bank B
5B and 7B
Bank C
2C and 4C
Bank D
6D and 8D
1 X X — —
2 X X X X
After installing FBDIMMs, use RBSU to configure the system for mirrored memory support.
Power supply backplane
To remove the component:
1. Power down the server (on page 30).
2. Remove all power supplies ("Hot-plug power supply" on page 34).
3. Extend or remove the server from the rack ("Remove the server from the rack" on page 31).
4. Remove the access panel ("Access panel" on page 32).
5. Remove the power supply backplane.
To replace the component, reverse the removal procedure.
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