NVMe

Install

sudo apt install -y nvme-cli

CLI

# list devices
nvme list
 
nvme smart-log /dev/nvme0n1
 
isdct show -d DeviceStatus,Index,Firmware,FirmwareUpdateAvailable -intelssd

Fix nvme1: ignoring ctrl due to duplicate subnqn
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803692

# dmesg | grep nvme
[    2.546620] nvme nvme0: pci function 0000:5e:00.0
[    2.552447] nvme nvme1: pci function 0000:5f:00.0
[    2.768347] nvme nvme1: ignoring ctrl due to duplicate subnqn (nqn.2017-12.org.nvmexpress:uuid:11111111-2222-3333-4444-555555555555).
[    2.775422] nvme nvme1: Removing after probe failure status: -22
[    2.779813]  nvme0n1: p1 p2

Fix by upgrade NVMe firmware
http://www.panticz.de/intel/nvme

Links
https://wiki.hetzner.de/index.php/NVMe