Dell EMC NVDIMM-N Persistent Memory User Guide

There are two types of device objects related to persistent memory in Windows Server – Physical NVDIMMs and Logical Persistent Memory Disks on top of the physical driver.

In Device Manager, physical NVDIMMs appear under "Memory devices", while logical disks are under "Persistent memory disks".

All NVDIMM-N devices are controlled by the nvdimm.sys driver, while the logical disks are controlled by the pmem.sys driver. Both types of device objects are created by scmbus.sys, the bus driver for persistent memory. This bus driver object can be found in Device Manager under "System Devices"