1. Installing Internal Optional Devices
Express5800/B120f User's Guide
56
Chapter 2 Preparations
Memory Sparing feature can be used under the following conditions:
•
Install two DIMMs in DIMM socket to configure a spare set.
•
Use a pair of DIMMs of the same model number for memory sparing set.
•
See
Chapter 2 (1. System BIOS)
in "
Maintenance Guide
", check if your server supports Memory Sparing
feature.
Select
Advanced
→
Memory Configuration
→
Memory Information
, and check if
Supported
is displayed
in
Sparing
.
•
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
Sparing
.
•
After restart, run SETUP again, and check if "
Spared
" 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
1
CPU1-DIMM1
1
CPU1-DIMM2
2
CPU1-DIMM2
3
CPU1-DIMM3
3
CPU1-DIMM3
5
CPU1-DIMM4
1
CPU1-DIMM4
1
CPU1-DIMM5
2
CPU1-DIMM5
3
CPU1-DIMM6
3
CPU1-DIMM6
5
–
–
CPU2-DIMM1
2
–
–
CPU2-DIMM2
4
–
–
CPU2-DIMM3
6
–
–
CPU2-DIMM4
2
–
–
CPU2-DIMM5
4
–
–
CPU2-DIMM6
6
The following Memory Sparing cannot be configured.
•
DIMMs of different model number are used for spare set.
•
Sparing with DIMMs in different memory channel
Notes on Configuring Memory Sparing
In Memory Sparing configuration, [Memory RAS Mode] is changed from "Sparing" to "Independent" in the
following cases:
•
When you additionally install DIMMs that unable to configure Memory Sparing
•
When you remove DIMMs that takes down Memory Sparing
"Spared" is not displayed in "CPUx_DIMMx Status xxxx MB (Spared)" in Memory Information of BIOS SETUP
menu.
