M.2 No longer detected by BIOS

[george.zervos69]

Just finished a build with a Samsung 960 EVO 250GB. At first, my BIOS detected it, but after a restart, it didn't. I've restarted it a bunch of times and the BIOS still can't detect it. My motherboard is an ASUS Prime Z370-A .

 

[Lutfij]

1| Remove all other SATA devices from your board. On that note, how many SATA devices are you planning to populate after installing system/OS is ready?
2| Make sure you're on the latest BIOS revision.
3| Which slot did you populate on your board?

 

[george.zervos69]

1| Remove all other SATA devices from your board. On that note, how many SATA devices are you planning to populate after installing system/OS is ready?
2| Make sure you're on the latest BIOS revision.
3| Which slot did you populate on your board?

1- I have a 1tb Seagate Barracuda currently connected to the board
2- I am
3- I used the M.2_2 slot right in front of the CPU

 

[mazboy]

Is your BIOS set to "AHCI" NOT "RAID"?

 

[george.zervos69]

Is your BIOS set to "AHCI" NOT "RAID"?

I think that might be the problem, I forgot that I started the RAID process but couldn't finish it and just forgot about it. Is there a way to undo it?

 

[mazboy]

My experience is that when you change that setting in BIOS, regardless of the direction you go (RAID->AHCI or AHCI->RAID), you are going to have to do a clean install of the OS because the BIOS loses track of where the boot sector is.