I have an Asus M5A99FX Pro R.2 and all the available SATA ports are being used.
From the user manual of the MB it seems it uses the AMD Chipset 990FX/SB950 (see picture below), yet even after reading from the user manual and from different forums I am still not sure if I can add more HDD.
Because I have more HDD then SATA ports, I was considering to buy a port multiplier from ebay like this, connect it to one of the onboard SATA port and attach the spare drives I have ( 4 x 320GB) to the card. So total would be 8 drives: 4x80GB (onboard STA) + 4x320GB SATA from the multiplier.
Would it work with this MB?
I am using Ubuntu 14.04