Monitor temperature/IO of NVMe drive

Using nvme-cli, I can get temperature from a Samsung 950 Pro with this command:

nvme smart-log /dev/nvme0 | grep "^temperature"

You can get other informations too:

nvme smart-log /dev/nvme0

Smart Log for NVME device:nvme0 namespace-id:ffffffff
critical_warning                    : 0
temperature                         : 45 C
available_spare                     : 100%
available_spare_threshold           : 10%
percentage_used                     : 0%
data_units_read                     : 3,020,387
data_units_written                  : 2,330,810
host_read_commands                  : 26,960,077
host_write_commands                 : 15,668,236
controller_busy_time                : 65
power_cycles                        : 98
power_on_hours                      : 281
unsafe_shutdowns                    : 68
media_errors                        : 0
num_err_log_entries                 : 63
Warning Temperature Time            : 0
Critical Composite Temperature Time : 0

Note: using kernel 4.6.4

For users access:

/etc/sudoers

# For users group
%users ALL = NOPASSWD: nvme smart-log /dev/nvme0 | grep "^temperature"

# For all
ALL ALL = NOPASSWD: nvme smart-log /dev/nvme0 | grep "^temperature"

Here are some steps you can take. Ensure that your Linux kernel version is at least 3.19 and that you have the Intel Linux NVMe drivers installed. If that does not help consider installing the Linux NVMe command line interface.

With kernel 5.5 and beyond, temperature information is available to regular users via sysfs. For example, on my system:

/sys/class/nvme/nvme0/device/hwmon/hwmon1/name:nvme
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_alarm:0
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_crit:84850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_input:50850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_label:Composite
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_max:84850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp1_min:-273150
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp2_input:50850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp2_label:Sensor 1
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp2_max:65261850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp2_min:-273150
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp3_input:62850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp3_label:Sensor 2
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp3_max:65261850
/sys/class/nvme/nvme0/device/hwmon/hwmon1/temp3_min:-273150

The different temperatures are in the *_input files. The values are T(℃) * 1000. For example, the temperature from sensor 1 is ~51℃.