- Notes, cautions, and warnings
- Introduction
- Change list
- NVDIMM-N Overview
- Hardware
- BIOS
- iDRAC NVDIMM-N Management
- Server Behavior with NVDIMM-Ns
- DIMM Configuration Changes
- Windows
- Linux
- ESXi
- General Errata
Dell EMC NVDIMM-N Persistent Memory User Guide
BIOS Configuration Settings for NVDIMM-N
This section focuses only on the BIOS setup options that affect NVDIMM-N operation. For a description of all setup options, please refer to each server’s Installation and Service Manual. Persistent Memory BIOS settings are configurable by going into BIOS System Setup. Press F2 at the BIOS screen below to enter BIOS System Setup.
Select System BIOS > Memory Settings to see the following options:
- Node Interleaving
Specifies if Non-Uniform Memory Architecture (NUMA) is supported. If this field is set to Enabled, memory interleaving is supported if a symmetric memory configuration is installed. If the field is set to Disabled, the system supports NUMA (asymmetric) memory configurations. This option is set to Disabled by default. Node interleaving is not supported when NVDMM-N is present in the system.
WARNING:When Persistent Memory Interleaving is enabled in the Persistent Memory System Setup page, Node Interleaving setting also applies to Persistent Memory Interleaving.
Select Persistent Memory to configure NVDIMM-N setup options:
- Persistent Memory Scrubbing
- Set Persistent Memory Scrubbing mode.
Auto: System automatically scrubs persistent memory during POST when multibit errors have been detected.
One Shot: System will scrub persistent memory during POST on the entire persistent memory range once. Upon next boot, system will go back to “Auto“ persistent memory scrub mode.
Enable: System will scrub persistent memory during POST on the entire persistent memory range on everyboot.
NOTE:Scrubbing persistent memory on the entire persistent memory range could take more than 60 minutes during system POST depending on system memory population.
The following table describes each option that is available in the BIOS setup screen.
Option | Description |
|---|---|
Node Interleaving | Specifies if Non-Uniform Memory Architecture (NUMA) is supported. If this field is set to Enabled, memory interleaving is supported if a symmetric memory configuration is installed. If the field is set to Disabled, the system supports NUMA (asymmetric) memory configurations. This option is set to Disabled by default. Node Interleaving is not supported when NVDIMM-N is present in the system. WARNING:When Persistent Memory Interleaving is enabled in the Persistent Memory System Setup page, Node Interleaving setting also applies to Persistent Memory Interleaving.
This option is set to Disabled by default. |
Persistent Memory | Enables or disables NVDIMM-N operation. If this option is set to Off, NVDIMM-Ns are not mapped to System Physical Address (SPA) and are not presented to the OS. Data that has already persisted to NVDIMM flash are unaffected and are available for OS utilization when this option is returned to Non-Volatile DIMM. This option is set to Non-Volatile DIMM by default. |
NVDIMM-N Read-Only | When set to Enable, this forces NVDIMMs to be read-only. NVDIMM-N data is accessible to the OS but locked from any modifications. Read-only is intended for debug or maintenance operations. This option is set to Disable by default. |
NVDIMM-N Factory Reset and Secure Erase All Dimms | Enables resetting the NVDIMM-N to factory defaults and clearing data on the NVDIMM-N. If set to Enable, all data on all NVDIMM-N will be erased. This option does not clear the NVDIMM’s health information, and should be used to remove data and/or repurpose the NVDIMM-N. The reset and data erasure will occur when BIOS confirms that Setting Changes should be saved. This option is set to Disable by default. |
NVDIMM-N Interleave | Enables or disables interleaving on NVDIMM-N. When Enabled, NVDIMM-N interleaving will follow the same interleaving policy that applies to RDIMMs. Volatile RDIMM interleaving policy is not affected by this option. RDIMM system memory and NVDIMM-N persistent memory will remain as two distinct memory regions. This option is set to Disable by default. |
Battery Status | Indicates if the NVDIMM-N battery is ready. Battery Status can display one of the following states:
|
The following settings are applicable to each NVDIMM-N present in the server
Option | Description |
|---|---|
NVDIMM-N Memory Location | Specifies the memory slot location of the NVDIMM-N. |
NVDIMM-N Memory Size | Specifies information on the capacity of the NVDIMM-N. |
NVDIMM-N Memory Speed | Specifies information on the operating speed of the NVDIMM-N. |
NVDIMM-N Memory Firmware version | Specifies information on the current firmware version on the NVDIMM-N. |
NVDIMM-N Memory Serial Number | Specifies information on the serial number of the NVDIMM-N. |
| Remaining Rated Write Endurance [%] | Specifies information on the remaining NVDIMM-N flash life-time in terms of percentage. |
NVDIMM-N Factory Reset and Secure Erase | Enables resetting and clearing data on the specific NVDIMM-N, and results in loss of data on that specific NVDIMM-N. |
Please note that if any option was changed by mistake, press ESC to exit each setup screen, and select No when prompted at the screen below to discard all changes. Alternatively, options can be restored to the correct settings before responding Yes to the prompt below.
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