Replacing DIMMs
DIMM Rank Classification Labels
DIMMs come in a variety of ranks: single, dual, or quad. Each DIMM is shipped with a
label identifying its rank classification. The following table identifies the corresponding rank
classification label shipped with each DIMM.
TABLE 7
DIMM Classification Labels
Rank Classification
Label
Quad-rank DIMM
4Rx4
Dual-rank DIMM
2Rx4
Single-rank DIMM
1Rx4
Related Information
■
“DIMM and CPU Physical Layout” on page 133
■
“DIMM Considerations and Limitations” on page 135
■
“Error Correction and Parity” on page 136
■
“Identify and Remove Faulty DIMMs” on page 137
■
Error Correction and Parity
The server???s processor provides parity protection on its internal cache memories and ECC
protection of the data. The system can detect and log these types of errors to the ILOM event
log:
■
Correctable and uncorrectable memory ECC errors
■
Uncorrectable CPU internal errors
Advanced ECC corrects up to 4-bits in error on nibble boundaries, as long as al l of these bits
are all in the same DRAM. If a DRAM fails, the DIMM continues to function.
For instructions for clearing DIMM faults, see
. For more
information about fault management, refer to the ILOM 3.0 documentation.
Related Information
■
“DIMM and CPU Physical Layout” on page 133
136
Sun Netra X4270 Server • September 2015
Summary of Contents for Sun Netra X4270
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