Deployment Guide

Table Of Contents
Configuring Windows Server HCI persistent memory
hosts
Three types of device objects are related to persistent memory on Windows Server 2019: the NVDIMM root device, physical
INVDIMMs, and logical persistent memory disks. In Device Manager, physical INVDIMMs are displayed under Memory devices,
while logical persistent disks are under Persistent memory disks. The NVDIMM root device is under System Devices. The
scmbus.sys driver controls the NVDIMM root device.
The nvdimm.sys driver controls all NVDIMM devices, while the pmem.sys driver controls the logical disks. Both the
nvdimm.sys and pmem.sys drivers are the same for all types of persistent memory, such as NVDIMM-N and Intel Optane
DC Persistent Memory (INVDIMM).
The following figure shows the Device Manager on a system with 12 INVDIMMs across dual CPU sockets and two persistent
storage disks:
Figure 5. Device Manager example
Appendix A: Persistent Memory for Windows Server HCI
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