[SSD and HDD Array]

I have 2 SSDs(480GB) and 2 HDDs(8TB). Can I use them as a single array with 1 HDD and 1 SSD as parity drive and 1 HDD and 1 SSD as an array?

 

[No PWM Controller?]

My configuration for Unraid:

Motherboard: Supermicro X11SSL-F, Version 1.01

Processor: Intel Xeon E3 - 1230v6

RAM: 16GB

HDD: 2 x 8TB Seagate

 

I have installed Unraid on the above system. The problem I am facing is with DYNAMIX SYSTEM AUTOFAN. It is unable to detect a PWM controller. What to do now?