Dell EMC NVDIMM-N Persistent Memory User Guide

mdadm

Create software RAID on NVDIMM-Ns.

Say there are 6 devices, /dev/pmem0.. /dev/pmem5.

Create directory /mnt/md0 /mnt/md1 /mnt/md2 /mnt/md5 /mnt/md6.

$ mkdir -p /mnt/md0 

Create RAID 0

$ mdadm --create --verbose /dev/md0 --level=0 --raid-devices=6 /dev/pmem0 /dev/pmem1 /dev/pmem2 /dev/pmem3 /dev/pmem4 /dev/pmem5
$ cat /proc/mdstat
$ mkfs.xfs /dev/md0
$ mount /dev/md0 /mnt/md0
$ lsblk

Before you unmount the device, Read/Write data into /mnt/md0

$ umount /dev/md0
$ mdadm --stop /dev/md0
$ mdadm --zero-superblock /dev/pmem0 /dev/pmem1 /dev/pmem2 /dev/pmem3 /dev/pmem4 /dev/pmem5
$ lsblk

Creating RAID 1 is similar as above

$ mdadm --create --verbose /dev/md1 --level=1 --raid-devices=6 /dev/pmem0 /dev/pmem1 /dev/pmem2 /dev/pmem3 /dev/pmem4 /dev/pmem5
$ cat /proc/mdstat
$ mkfs.xfs /dev/md1
$ mount /dev/md1 /mnt/md1
$ lsblk

Before unmounting the device, Read/Write data into /mnt/md1

$ umount /dev/md1
$ mdadm --stop /dev/md1
$ mdadm --zero-superblock /dev/pmem0 /dev/pmem1 /dev/pmem2 /dev/pmem3 /dev/pmem4 /dev/pmem5
$ lsblk

RAID 5/5/6/10 Volumes can be created in a similar way.