HP ProLiant BL480c Server-Blade - Manual (Page 33)

Hardware options installation 33
• FBDIMM pairs in the same memory bank must have identical HP part numbers.
• FBDIMMs must be populated as shown in the following table for the designated AMP mode.
AMP modes Bank A
1A, 4A Bank B
7B, 10B Bank C
2C, 5C Bank D
8D, 11D Bank E
3E, 6E Bank F
9F, 12F
Advanced
ECC
X X — — — —
Advanced
ECC or
mirrored
X X — — — —
Advanced
ECC or online
spare or
mirrored
X X X — — —
Advanced
ECC or online
spare or
mirrored
X X X X X X
Multiple memory modes are supported, based on FBDIMM population and AMP mode selection. The
server blade defaults to Advanced ECC. If the FBDIMM population is modified after the memory mode is
selected in RBSU, and no longer supports the selected mode, the system defaults to Advanced ECC during
POST.
If the server contains more than 4 GB of memory, consult the operating system documentation about
accessing the full amount of installed memory.
Advanced ECC memory configuration
Advanced ECC memory is the default memory protection mode for this server blade. In Advanced ECC,
the server blade is protected against correctable memory errors. The server blade provides notification if
the level of correctable errors exceeds a pre-defined threshold rate. The server blade does not fail
because of correctable memory errors. Advanced ECC provides additional protection over Standard ECC
because it is possible to correct certain memory errors that would otherwise be uncorrectable and result in
a server blade failure.
Whereas standard ECC can correct single-bit memory errors, Advanced ECC can correct single-bit
memory errors and multi-bit memory errors if all failed bits are on the same DRAM device on the
FBDIMM.
In addition to general configuration requirements, Advanced ECC memory also has the following
configuration requirements:
• FBDIMMs must be installed in pairs unless operating in single-FBDIMM mode. The server blade
supports single-FBDIMM mode in FBDIMM slot 1A only.
• FBDIMMs must be installed in sequential order, beginning with bank A.
For Advanced ECC mode, populate the FBDIMM slots as specified in the following table:
Configuration Bank A
1A , 4A Bank B
7B, 10B Bank C
2C, 5C Bank D
8D, 11D Bank E
3E, 6E Bank F
9F, 12F
1 X — — — — —
2 X X — — — —
3 X X X — — —
4 X X X X — —
5 X X X X X —