Exactly, its a pretty useful board, but i got too many drive to use the included sata port so i have a sata controller, 2 usb controller plus a 2 slot gpu in there x)
to explain a bit, since I use a m.2 ssd, two of the sata port are blocked leaving me with four sata for 5 drive, and also since the third pcie slot is used for the sata controler, i have set it so it is faster using a 4x pcie, and thus disabling two more sata (in bios i've got the choice of either a 4x pcie and disabling sata5-6 or 1x and having both sata).
With that in mind, I could remove my 2tb drive, remove the sata controller and use onboard ones, but then the 900p would still run at 1x
I've only think about this now but instead of going with dual m.2, I could use my last sata port to go with a normal ssd instead ? i dont know if it would cause speed issues, or compatibility issue with the m.2 for the cache pool