Removal / Replacement; Cluster On Die And Early Snoop Features - NEC Express5800/R120g-2M User Manual

Chapter 2 Preparations
1.11.6

Removal / Replacement

To remove DIMM, reverse the installation procedure.
Be sure to install dummy cover to the slots from where DIMMs are removed.
Follow the steps below after replacing or removing DIMMs.
1. Confirm that no error messages are displayed on POST. If any error message is displayed, see Chapter
3 (1. Post Error Message) in "Maintenance Guide".
2. Run BIOS Setup Utility, select Advanced  Memory Configuration  Memory Retest, and set Yes.
3. Select Server  Power Measurement Policy, set One Time, and then select Save Changes and Exit.
4. Set the size of Paging File to the recommended size (1.5x total memory size) or more.
If using a Windows OS, see Chapter 1 (6.1 Specifying Memory Dump Settings (Debug Information)) in
"Installation Guide (Windows)".
For other OS, follow the manual of the OS.
1.11.7

Cluster On Die and Early Snoop features

Advanced  Memory Configuration submenu in BIOS Setup Utility has two options, listed in the following table.
Option
Cluster On Die
Early Snoop
Read the following when enabling the Cluster On Die feature.
1CPU configuration
-
Memory RAS Mode: Independent / Mirroring / Lockstep
At least, all of CPU1_DIMM1 to DIMM4 must be filled by DIMM.
Memory RAS Mode: Sparing
At least, all of CPU1_DIMM1 to DIMM3, DIMM5 to DIMM7, DIMM9 to DIMM11 must be filled by DIMM.
2CPU configuration
-
Memory RAS Mode: Independent / Mirroring / Lockstep
At least, all of CPU1_DIMM1 to DIMM4 and CPU2_DIMM1 to DIMM4 must be filled by DIMM.
Memory RAS Mode: Sparing
At least, all of CPU1_DIMM1 to DIMM3, DIMM5 to DIMM7, DIMM9 to DIMM11 and CPU2_DIMM1 to
DIMM3, DIMM5 to DIMM7, DIMM9 to DIMM11 must be filled by DIMM.
In order to effectively utilize the Cluster On Die feature, the following DIMM installed number is recommended.
1CPU configuration
-
Memory RAS Mode: Independent / Mirroring / Lockstep
Mount DIMMs to CPU1_DIMM1 to DIMM8 slot, or mount DIMMs to CPU1_DIMM1 to DIMM12 slot.
Memory RAS Mode: Sparing
Mount DIMMs to CPU1_DIMM1 to DIMM12 slot.
60
Important
Failing to install dummy cover to vacant slot may cause malfunction of the
server due to insufficient cooling effect.
Note
When removing a defective DIMM, check error messages displayed at POST or
NEC ESMPRO and check the DIMM socket where the defective DIMM is installed.
Parameter Description
[Disabled] Enables or disables the Cluster On Die feature. This option can be
Enabled set to Enabled when NUMA is enabled and the processor(s)
support(s) the Cluster On Die feature.
- Note: If you use the OS below, this item must be disabled.
- VMware ESXi 5
Disabled Enables or disables the early snoop mode for processor(s) snoop
[Enabled] mode. This option can be set to Enabled when Cluster On Die is
disabled.
Express5800/R120g-2M User's Guide
1. Installing Internal Optional Devices
[ ] : Factory setting