Dell PowerEdge R740 EMC NVDIMM-N Persistent Memory User Guide - Page 42

Linux, Identify and Con PMEM —Persistent Memory Device

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10 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 42 Linux

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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
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Linux