NEC Express5800/A2000 Guía de configuración descargar pdf (Pagina 22)

CONFIGURATION GUIDE – NEC Express5800/A2040b, A2020b, A2010b, A1040b

NEC Corporation Revision 8.0 – April 2015

3.2 Memory Configuration

Refer to the section in accordance with your memory configuration.

Memory configuration consists of 2 modes; “Independent Mode” and “Lockstep Mode”.

Under each Mode, 2 features are available; “Memory Rank Sparing” and “Memory Mirroring”.

Default setting at the server delivery is Lockstep Mode.

 Independent Mode (only): Refer to 3.2.1

 Lockstep Mode (only): Refer to 3.2.2

 Memory Rank Sparing: Refer to 3.2.3

 Memory Mirroring: Refer to 3.2.4

Please refer to “Memory” of “Reference” section for Memory on the Memory Riser Card (DIMM) installation

priority/order per Independent Mode, Lockstep Mode, Memory Rank Sparing and Memory Mirroring..

Memory Configuration Feature Comparison

See the table below for feature comparisons of memory configurations supported.

Independent Mode

(only)

Memory Rank Sparing

under Independent

Mode

Memory Mirroring

under Independent Mode

Summary

In case of correctable

errors, switching to

spare memory rank

Redundant memory

Available Memory

1/2(8GB RDIMM),

3/4(16GB RDIMM),

7/8(32GB LRDIMM) or

3/4(64GB LRDIMM)

of physical memory

1/2 of physical memory

Available Memory

Channel

Maximum Memory

Capacity

512GB(8GB RDIMM)

1024GB(16GB RDIMM)

2048GB(32GB LRDIMM)

4096GB(64GB LRDIMM)

256GB(8GB RDIMM)

768GB(16GB RDIMM)

1792GB(32GB LRDIMM)

3072GB(64GB LRDIMM)

256GB(8GB RDIMM)

512GB(16GB RDIMM)

1024GB(32GB LRDIMM)

2048GB(64GB LRDIMM)

Data Correction

ECC, x4 SDDC

←

Notes

 RDIMM and LRDIMM

cannot be mixed

 RDIMM and LRDIMM

cannot be mixed

 RDIMM and LRDIMM

cannot be mixed

4 memory channels per Memory Riser Card.

All DIMMs have the same capacity

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 73 74

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