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<!--
title: "MegaRAID controller monitoring with Netdata"
custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/megacli/README.md"
sidebar_label: "MegaRAID controllers"
learn_status: "Published"
learn_topic_type: "References"
learn_rel_path: "References/Collectors references/Devices"
-->
# MegaRAID controller monitoring with Netdata
Collects adapter, physical drives and battery stats using `megacli` command-line tool.
Executed commands:
- `sudo -n megacli -LDPDInfo -aAll`
- `sudo -n megacli -AdpBbuCmd -a0`
## Requirements
The module uses `megacli`, which can only be executed by `root`. It uses
`sudo` and assumes that it is configured such that the `netdata` user can execute `megacli` as root without a password.
- Add to your `/etc/sudoers` file:
`which megacli` shows the full path to the binary.
```bash
netdata ALL=(root) NOPASSWD: /path/to/megacli
```
- Reset Netdata's systemd
unit [CapabilityBoundingSet](https://www.freedesktop.org/software/systemd/man/systemd.exec.html#Capabilities) (Linux
distributions with systemd)
The default CapabilityBoundingSet doesn't allow using `sudo`, and is quite strict in general. Resetting is not optimal, but a next-best solution given the inability to execute `megacli` using `sudo`.
As the `root` user, do the following:
```cmd
mkdir /etc/systemd/system/netdata.service.d
echo -e '[Service]\nCapabilityBoundingSet=~' | tee /etc/systemd/system/netdata.service.d/unset-capability-bounding-set.conf
systemctl daemon-reload
systemctl restart netdata.service
```
## Charts
- Adapter State
- Physical Drives Media Errors
- Physical Drives Predictive Failures
- Battery Relative State of Charge
- Battery Cycle Count
## Enable the collector
The `megacli` collector is disabled by default. To enable it, use `edit-config` from the
Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md), which is typically at `/etc/netdata`, to edit the `python.d.conf`
file.
```bash
cd /etc/netdata # Replace this path with your Netdata config directory, if different
sudo ./edit-config python.d.conf
```
Change the value of the `megacli` setting to `yes`. Save the file and restart the Netdata Agent
with `sudo systemctl restart netdata`, or the appropriate method for your system.
## Configuration
Edit the `python.d/megacli.conf` configuration file using `edit-config` from the
Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md), which is typically at `/etc/netdata`.
```bash
cd /etc/netdata # Replace this path with your Netdata config directory, if different
sudo ./edit-config python.d/megacli.conf
```
Battery stats disabled by default. To enable them, modify `megacli.conf`.
```yaml
do_battery: yes
```
Save the file and restart the Netdata Agent with `sudo systemctl restart netdata`, or the [appropriate
method](https://github.com/netdata/netdata/blob/master/docs/configure/start-stop-restart.md) for your system.
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