M12-2 Memory Configuration Rules

Asset ID:	1-71-2380998.1
Update Date:	2018-04-05
Keywords:

Solution Type Technical Instruction Sure

Solution 2380998.1 : M12-2 Memory Configuration Rules

Applies to:

Fujitsu SPARC M12-2S - Version All Versions to All Versions [Release All Releases]
Fujitsu SPARC M12-2 - Version All Versions to All Versions [Release All Releases]
SPARC

Goal

This document describes the correct memory configuration for a M12-2 and a M12-2S

Solution

CPU/Memory configuration rules:

- Memory Size
- DIMMs：8/16/32/64GB
- 32 Slots per BB

M12-2/M12-2S: – Allowed DIMM combination connected to the same CPU chip is as follows:

– No rule difference between non memory-mirror users and memory-mirror users
- 64GB memory is not used in combination with the 8GB or 16GB

DIMMs combinations installed GRP-A: 8GB/16GB (Cannot use 64GB in combination)
GRP-A: 32GB (Can use 64GB in combination)

DIMMs combinations installed GRP-B: 8GB/16GB (Cannot use 64GB in combination)
GRP-B: 32GB (Can use 64GB in conbination)

NOTE: In the following description, 10A-13A means 10A, 11A, 12A, 13A

– M12-2/M12-2S:
CMUL
– CPU#0: CMUL/MEM#00A-07A, 00B-07B

CMUU
– CPU#0: CMUU/MEM#00A-07A, 00B-07B

CPU/Memory configuration rule

M12-2/M12-2S: 1 CPU configuration has 16 DIMM slots.

The below image shows a 1 CPU configuration where the CMUL memory is populated

Bank A should be populated first (light green area)
Bank B next (blue area)

M12-2/M12-2S: 2 CPU configuration has 32 DIMM slots:

On M12-2/M12-2S, CMUU (CPU module upper) is optional
– CPU on CMUU is fixed to CMUU. To install 2nd CPU, CMUU should be mounted
– To install more than 16 DIMMs, CMUU must be mounted

This image shows a 2 CPU configuration where CMUU and CMUL memory are populated

CMUL should be populated first, bank A (light green area)
CMUU bank A should be populated next (yellow area)
CMUL bank B should be next (blue area)
CMUU bank B the last slots to be populated (dark green area)

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