Users Guide
Table Of Contents
- Dell EMC NVDIMM-N Persistent Memory User Guide
- 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
PowerShell Cmdlets
#Get-PmemDisk
● Returns one or more logical persistent memory disks.
● The returned object has information about size, atomicity type, health status, and underlying physical devices.
#Get-PmemPhysicalDevice
● Returns one or more physical persistent memory devices (NVDIMMs).
● The returned object has information about size(s), RFIC, device location, and health/operational status.
#New-PmemDisk
● Creates a new disk out of a given unused region.
● Writes out the labels to create the namespace then rebuilds the SCM stacks to expose the new logical device.
● Optional parameters:
○ FriendlyName gives the persistent memory disk a friendly name. Default is "PmemDisk<N>"
○ AtomicityType lets you set BTT. Default is "none"
#Remove-PmemDisk
● Removes the given persistent memory disk. It accepts the output of Get-PmemDisk.
● Deletes the namespace’s labels and then rebuilds the SCM stacks to remove the logical device.
● Requires user confirmation, which can be overridden with -Force.
#Get-PmemUnusedRegion
● Returns aggregate pmem regions available for provisioning a logical device.
● Returned object has a unique region ID, total size, and list of physical devices that contribute to the unused region
#Initialize-PmemPhysicalDevice
● Writes zeroes to the label storage area, writes new label index blocks, and then rebuilds the SCM [Storage class memory]
stacks to reflect the changes.
● Requires user confirmation, which can be overridden with -Force.
● This cmdlet is intended as a "big hammer" recovery mechanism. It is not recommended for normal use.
NVDIMM-N Interleaving
Windows Server 2019 supports NVDIMM-N interleaving which can further enhance system performance across various
applications. This option can be configured through the BIOS Setup Menu.
In the OS, this is visible as a single logical device across several physical devices on that socket. Two interleaved persistent
memory disks should be visible, one for each socket in the Device Manager, if there are NVDIMM-N modules plugged in on both
the sockets.
Figure 29. Interleaved Persistent Memory Disk in Device Manager
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Windows