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Online spare memory configuration
Online spare FBDIMM configuration requirements (in addition to general configuration requirements):
When only bank A is being used, it must be fully populated with dual-rank FBDIMMs.
If banks A and C are being used, they must be fully populated.
If installed, bank A and bank C must contain FBDIMMs with identical part numbers.
If installed, bank B and bank D must also contain FBDIMMs with identical part numbers.
In online spare mode, FBDIMMs must be populated as specified in the following table:
Configuration
Branch 0
Bank A
1A and 3A
Branch 0
Bank C
2C and 4C
Branch 1
Bank B
5B and 7B
Branch 1
Bank D
6D and 8D
1
*
X
- - -
2
X X
- -
3
X X X X
* Configuration 1 is only supported if using bank A, populated with dual-rank FBDIMMs. All FBDIMMs 1GB and above are
dual-rank.
After installing FBDIMMs, use RBSU to configure the system for online spare memory support ("Configuring online spare
memory" on page 57).
Mirrored memory configuration
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
NOTE:
After installing FBDIMMs, use RBSU to configure the system for mirrored memory support ("Configuring mirrored
memory" on page 57).
DA - 12477 Worldwide QuickSpecs — Version 36 — 2/29/2008
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