1. Installing Internal Optional Devices
Express5800/R120d-2M User’s Guide
72
Chapter 2 Preparations
Memory Lock Step feature can be used under the following conditions:
•
Install DIMMs that operate in parallel in memory socket.
•
All the installed DIMMs should have the same capacity.
•
Refer to
Chapter 2 (1. System BIOS)
in "
Maintenance Guide
", run SETUP, change parameters as shown
below, save the settings, and exit from SETUP.
Advanced
→
Memory Configuration
→
Memory RAS Mode
→
Change to
LockStep
.
•
After restart, run SETUP again, and check if "
Lock Step
" is displayed for the following parameter.
Advanced
→
Memory Configuration
→
Memory Information
→
CPUx_DIMMx Status
•
Installation order depends on CPU configuration. See the figure below.
Memory Lock Step cannot be configured in the following cases:
•
Memory Lock Step between memory channels of different memory controllers (CPU)
•
Memory Lock Step within the same memory channel
Notes on Configuring Lock Step
In Memory Lock Step configuration,
Memory RAS Mode
menu is changed from "
Lock Step
" to "
Independent
"
in the following cases:
•
When you additionally install DIMMs that unable to configure Memory Lock Step
•
When you remove DIMMs that takes down Memory Lock Step
1CPU
構成
搭載順序
2CPU
構成
搭載順序
2
4
6
2
4
6
5
3
1
5
3
1
3
7
11
3
7
11
9
5
1
9
5
1
4
8
12
4
8
12
10
6
2
10
6
2
CPU1_DIMM 3
CPU1_DIMM 7
CPU1_DIMM 11
CPU1_DIMM 4
CPU1_DIMM 8
CPU1_DIMM 12
CPU1_DIMM 10
CPU1_DIMM 6
CPU1_DIMM 2
CPU1_DIMM 9
CPU1_DIMM 5
CPU1_DIMM 1
CPU2_DIMM 3
CPU2_DIMM 7
CPU2_DIMM 11
CPU2_DIMM 4
CPU2_DIMM 8
CPU2_DIMM 12
CPU2_DIMM 10
CPU2_DIMM 6
CPU2_DIMM 2
CPU2_DIMM 9
CPU2_DIMM 5
CPU2_DIMM 1
1CPU
configuration
2CPU
configuration
