Pression 5510 m2 not found by bios stil I can boot from it during the f12 process.

Hi

I have a Dell Precission 5510 with an Ssd (m2) and a ssd harddisk.

I installed Windows 7 on a new Ssd (m2) after a lot of problems (like usb 3.0) drivers missing set in sata mode etc)

So Laptop is set on Sata mode.

a)When I try to boot nothing happened

b)When I start with f12 I can see the m2 ssd and can boot from it.

c)When I start the bios I do not see the m.2 Drive

So when I wish to do a cold boot I have every time to press the f12 to select the m2 drive and go farther. I do not think this is the right procedure. Any help please .

Regs