Documentation for ndctl and daxctl


ndctl-monitor - Monitor the smart events of nvdimm objects


ndctl monitor [<options>]


Ndctl monitor is used for monitoring the smart events of nvdimm objects and dumping the json format notifications to syslog, standard output or a logfile.

The objects to monitor and smart events to notify can be selected by setting options and/or the default configuration file (/etc/ndctl/monitor.conf). Both of the values in configuration file and in options will work. If there is a conflict, the values in options will override the values in configuration file. The changed values in configuration file will work after the monitor is restarted.


Run a monitor as a daemon to monitor DIMMs on bus “nfit_test.1”

ndctl monitor --bus=nfit_test.1 --daemon

Run a monitor as a one-shot command and output the notifications to /var/log/ndctl.log

ndctl monitor --log=/var/log/ndctl.log

Run a monitor daemon as a system service

systemctl start ndctl-monitor.service


-b; --bus=
Enforce that the operation only be carried on devices that are attached to the given bus. Where bus can be a provider name or a bus id number.

-d; --dimm=
A nmemX device name, or dimm id number. Select the devices to monitor reference the given dimm.

-r; --region=
A regionX device name, or a region id number. The keyword all can be specified to carry out the operation on every region in the system, optionally filtered by bus id (see –bus= option).

-n; --namespace=
A namespaceX.Y device name, or namespace region plus id tuple X.Y.

-l &lt;file | syslog | standard&gt;; --log=&lt;file | syslog | standard&gt;
Send log messages to the specified destination.

Send log messages to specified <file>. When fopen() is not able to open <file>, log messages will be forwarded to syslog.

Send messages to syslog.

Send messages to standard output.

The default log destination is syslog if “–daemon” is specified, otherwise standard. Note that standard and relative path for <file> will not work if “–daemon” is specified.

-c; --config-file=
Provide the config file to use. This overrides the default config typically found in /etc/ndctl/

Run a monitor as a daemon.

-D; --dimm-event=
Name of an smart health event from the following:

The monitor will attempt to enable the alarm control bits for all specified events.

-u; --human
Output monitor notification as human friendly json format instead of the default machine friendly json format.

-v; --verbose
Emit extra debug messages to log.


Copyright (c) 2018, FUJITSU LIMITED. License GPLv2: GNU GPL version 2 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


ndctl-list, ndctl-inject-smart