Starting wie Samba 4.4.0, it comes with multi-channel support as a new experimental feature. This is still marked as unstable in current 4.5.0 release, but if you’re crazy, you can enable it easily with a new smb.conf parameter.
The Asrock C2750D4I and C2550D4I boards provides multiple 4-pin PWM connectors. PWM configuration is available in the BIOS hardware monitoring
section, but you can not change any parameters through the hwmon interface in
/sys/class/hwmon. Asrock uses a Nuvoton chip (nct6776 compatible) for monitoring
hardware sensors but the fans are not connected to this chip. Instead, they are handled by the onboard BMC.
You can get the current state of the sensors with