Wont boot after creating pool

[Björken]

Hi, I'm new to the truenas world and trying to build my first nas.
My setup is
Asus P8H61-M-PRO motherboard
i7-2600 CPU
12Gb ram
Samsung 750 Evo 120GB boot drive
4x 2TB Seagate iron wolf driver
PCI-e SATA controller

I have tried installing truenas multiple times now, and all the times I get the same issue. If I install using UEFI mode it doesn't boot I only get no boot device found. If I install using bios mode it is installed and boots as it should.
Now to the problem if reboot the server after creating a pool with the 4 drives the motherboard gets stuck on the post screen. if I unplug the drives it boots normally. the only solution I found so far is to take out the drives and reformat them then redo the installation.

 

[Patrick M. Hausen]

Can you swap the SATA ports around so the boot drive is detected first?

 

[Björken]

I'm not sure how the boot drive is connected directly to the motherboard and the HDDs are connected to the PCI-e controller

 

[Björken]

Can you swap the SATA ports around so the boot drive is detected first?

Now I have tried connecting the HDDs directly to the motherboard and as long as one of the HDDs I connected it gets stuck on the splash screen

 

[Patrick M. Hausen]

BIOS update, open support ticket with mainboard manufacturer.