1. Installing Internal Optional Devices
Express5800/B120f User's Guide
51
Chapter 2 Preparations
Memory Mirroring feature can be used under the following conditions:
•
Install two DIMMs in DIMM sockets to configure a mirror set.
•
Both of DIMMs to be used for mirror set should be of the same model number.
•
See
Chapter 2 (1. System BIOS)
in "
Maintenance Guide
", check if your server supports Memory Mirroring
feature.
Select
Advanced
→
Memory Configuration
→
Memory Information
, and check if
Supported
is displayed
in
Mirroring
.
•
See
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
Mirroring
.
•
After restart, run SETUP again, and check if "
Mirrored
" is displayed for the following parameter.
Advanced
→
Memory Configuration
→
Memory Information
→
CPUx_DIMMx Status
•
Installation order depends on CPU configuration. See the table below.
Installation order in
1-CPU configuration
Installation order in
2-CPU configuration
CPU1-DIMM1
Installation not allowed
CPU1-DIMM1
Installation not allowed
CPU1-DIMM2
1
CPU1-DIMM2
1
CPU1-DIMM3
1
CPU1-DIMM3
1
CPU1-DIMM4
Installation not allowed
CPU1-DIMM4
Installation not allowed
CPU1-DIMM5
2
CPU1-DIMM5
3
CPU1-DIMM6
2
CPU1-DIMM6
3
–
–
CPU2-DIMM1
Installation not allowed
–
–
CPU2-DIMM2
2
–
–
CPU2-DIMM3
2
–
–
CPU2-DIMM4
Installation not allowed
–
–
CPU2-DIMM5
4
–
–
CPU2-DIMM6
4
Memory Mirroring cannot be configured in the following case:
•
Memory Mirroring within a specific memory channel
Notes on Configuring Memory Mirroring
In Memory Mirroring configuration, [Memory RAS Mode] is changed from "Mirroring" to "Independent" in the
following cases:
•
When you additionally install DIMMs that unable to configure Memory Mirroring
•
When you remove DIMMs that takes down Memory Mirroring
"Mirrored" is not displayed in "CPUx_DIMMx Status xxxx MB (Mirrored)" in Memory Information of BIOS SETUP
menu.
