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Monitoring plugin to check SMART attributes
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check_smart_attributes - Nagios/Icinga plugin to check SMART attributes


$ sudo check_smart_values -dbj <smartdb json file> -d <device path> [-d <device path>]
[-ucfgj <user config json file>] [-p <path to smartctl>] [-nosudo] [-cu] [-ap] [-s]
[-O <extra options>][ -v|-vv|-vvv] [-h] [-V]


$ sudo ./check_smart_attributes -d /dev/sda -dbj ./check_smartdb.json
Critical [sda_UDMA_CRC_Error_Count = Critical]|sda_Media_Wearout_Indicator=097;16;6
sda_Host_Writes_32MiB=517197 sda_Host_Reads_32MiB=395442


The following software is required for check_smart_attributes:

  • Perl
  • Getopt::Long
  • Config::JSON
  • Storable qw(dclone);
  • smartctl


On Ubuntu use this command to install smartmontools including smartctl and the Perl library for parsing JSON config files:

$ sudo apt-get install smartmontools libconfig-json-perl

Mailing List


Device(s) to check

The -d option specifies the devices to check. If multiple devices should be checked, specify the option multiple times: -d /dev/sda -d /dev/sdb Then multiple devices can be monitored with one check.

Devices with LSI RAID controllers

For devices behind LSI controllers use the megaraid device string and the corresponding device path. You can get the DID with

$ sudo storcli64 /c0 /eall/sall show

From this output use the number in the DID column. Then call the plugin:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d megaraid4,/dev/sda

Devices with Adaptec RAID controllers

For devices behind Adaptec controllers use the sg device string and an extra option for the device interface:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d /dev/sg2 -O sat
$ sudo ./check_smart_attributes -dbj check_smartdb.json -d /dev/sg2 -O scsi

Please consider, that the extra option is mandatory. To find your devices you can use command line tools like sg_scan. As an alternative for Adaptec RAID controllers on Windows or Linux you can specify aacraid,H,L,ID where H is the Host number and L is the LUN number. The ID can be found by executing arcconf getconfig CONTROLLER-ID. Sample output for CONTROLLER-ID=1: ...Reported Channel,Device(T:L): 0,4(4:0)... Then the device configuration would be:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d aacraid,0,0,4

Devices with hpsa/cciss based RAID controllers

For devices behind hpsa/cciss based RAID controller, you'll mostly find in HP Hardware, you can use 'cciss,/dev/sg' for hpsa or 'cciss,/dev/cciss/cd' for cciss where is the number of the device and the RAID controller e.g.:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d cciss,1_/dev/sg2

Devices with 3ware RAID controllers

For devices behind 3ware RAID controllers the 3ware device ID must be used with the corresponding tw device, e.g.:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d 3ware,8,/dev/twa0

NVMe devices

For NVMe devices just use '/dev/nvme[a-z0-9]+'. As attributes with NVMe are not model specific the generic NVMe entry in the smartdb JSON file is used:

$ sudo ./check_smart_attributes -dbj check_smartdb.json -d /dev/nvme0


The smartdb JSON file specifies the smart attribute configuration for a device. It contains the configuration which value (VALUE or RAW_VALUE) must be taken for a smart attribute ID. The config is checked on the basis of device and model strings given by smartctl.

If your device is not listed in the config please study the device specification and add the id--attribute mapping.

Attributes for NVMe devives are not model specific, therefore only one generic NMVe entry is present in the smart db. If the device is set up as 'nvme[a-z0-9]+' then NVMe specific parsing of attributes is done. The generic entry is necessary to enable default thresholds and performance values for NVMe devices. Moreover now with the generic entry users can still override the smart db entry with 'ucfgj'. This is way better than having hardcoded parsing of NVMe attributes in the plugin.

The smartdb JSON file also specifies default threshold and performance values. These values state the Warning/Critical sensor thresholds and the performance data sensors. The threshold and performance base config can be overwritten with a user config JSON file (see check_smartcfg.json below).

If a RAW_VALUE requires bit rotation, check_smartdb.json can take an additional rotation pattern, e.g.:

"230" : ["85","95","r8"]

Then the value is shifted according to the third argument, left if "l" is specified or right if "r" is used. The number suffix tells the plugin how many times shift should be done.

check_smartcfg.json (optional)

Specify the path at which the JSON user config file can be found. The user config can be used to override the threshold and performance base config. This can be useful if the thresholds for a specific device must be changed (e.g. showing up a non-critical error).

Note that a given sensor in the user config overwrites the corresponding sensor in the smartdb base JSON file.

Attention: if megaraid devices are used the path must be set as '/dev/megaraidID'. This is necessary for the internal naming convention the plugin uses. Attention: if 3ware devices are used the path must be set as '/dev/3wareID'. This is necessary for the internal naming convention the plugin uses.

sudo for nagios user

The smartctl executable requires root privileges to check a device. In order to use the plugin with the nagios user, it is recommended to create a sudoers entry for smartctl:

nagios ALL=(root) NOPASSWD:/usr/sbin/smartctl


check_smart_attributes: Nagios/Icinga plugin to check smart attributes with smartctl.

Copyright (C) 2019 Thomas-Krenn.AG,

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, see

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