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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
1*
2
3
* 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
1
2
NOTE: After installing FBDIMMs, use RBSU to configure the system for mirrored memory support ("Configuring mirrored
memory" on page 57).
Branch 0
Bank A
1A and 3A
2C and 4C
X
X
X
Bank A
1A and 3A
5B and 7B
X
X
DA - 12477 Worldwide QuickSpecs — Version 36 — 2/29/2008
Branch 0
Branch 1
Bank C
5B and 7B
-
X
X
Bank B
2C and 4C
X
X
Branch 1
Bank B
Bank D
6D and 8D
-
-
X
Bank C
Bank D
6D and 8D
-
X
-
-
X
-
X
Page 31
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