Users Guide

Linux
NVDIMM-N hardware is supported on versions 7.3, 7.4 , 7.5 and 7.6 versions of RHEL.
Topics:
• Identify and Configure PMEM —Persistent Memory Device
• Installation
• Verify Existing Filesystem
• Read-Only Mode NVDIMM-N
• Interleave
• Management Utility
• RHEL 7.6 features
• Linux Errata
Identify and Configure PMEM —Persistent Memory
Device
When the OS is up running, verify that NVDIMM-Ns are populated correctly.
Go into root user
$ su
Identify whether NVDIMM-Ns appear as /dev/pmem0, /dev/pmem1, .. /dev/pmemN, where N is a natural number.
# ls /dev/pmem*
Check the size of NVDIMM-N devices /dev/pmem0 to /dev/pmemN
# lsblk
Create xfs file system for all pmemN devices
# mkfs.xfs /dev/pmem0
Create directories on all nvdimmN
# mkdir –p /mnt/nvdimm0
# mount –t xfs –o dax /dev/pmem0 /mnt/nvdimm0
Save the mount point and option so that devices are mounted on next reboot.
# echo "/dev/pmem0 /mnt/nvdimm0 xfs dax 0 0" >> /etc/fstab
Write or copy files onto /mnt/nvdimm0
# echo “writing into nvdimm” >> /mnt/nvdimm0/write.txt
# shutdown
10
Linux 43