# NAS

## Hard drive temperture monitoring

Use the `drivetemp` module:

```
modprobe drivetemp
```

To start on boot:

```
echo drivetemp /etc/modules-load.d/drivetemp.conf
```

## Fans


Install external kernel modules:

```
yay -S  it87-dkms-git
```

Start at boot:

```
echo it87 > /etc/modules-load.d/it87.conf
```

```
pwm3 = system fans
pwm2 = CPU fan
```

### hddfancontrol

Method of controlling fan speed by hard drive temperture

https://github.com/desbma/hddfancontrol

```
yay -S hddfancontrol
```

nvme tempertures don't seem to be picked up with `-d nvme`, e.g.

```
[root@zaphod hwmon1]# hddfancontrol daemon -d /dev/nvme0n1 -p  /sys/class/hwmon/hwmon14/pwm3:255:77
Error: Failed to setup drives

Caused by:
    Unable to probe for drive state
```

So we explicity use the underlying device tempertures:

```
hddfancontrol daemon -d ata  -w /sys/class/hwmon/hwmon2/temp1_input:30:50 -w /sys/class/hwmon/hwmon1/temp1_input:30:50 -p  /sys/class/hwmon/hwmon14/pwm3:255:77
```