Install device-mapper-multipath

To use all the paths available on the FlashArray to the NVMe target, device mapper multipath is recommended over native multipathing. If the device-mapper multipath is not installed, it can be installed and configured using the following steps.

[root@splk-ix01 ~]# yum install device-mapper-multipath -y

Using vi, create a multipath.conf file under /etc directory with the following contents.

# This is a basic configuration file for Pure NVMe-oF multipath
#
defaults {
       polling_interval 10
}

devices {
  device {
    vendor                 "NVME"
    product                "Pure Storage FlashArray"
    path_selector          "queue-length 0"
    path_grouping_policy   "multibus"
    fast_io_fail_tmo       10
    user_friendly_names    no
    no_path_retry          10
    features               0
    dev_loss_tmo           60
  }
}

Start the multipath service and enable it to start at reboot with the following commands.

[root@splk-ix01 ~]# systemctl start multipathd
[root@splk-ix01 ~]# systemctl enable multipathd