I did not format the ssd, but IT SUDDENLY BOOTED FROM THE SSD AND ALL THE DRIVES ARE NOW DETECTED i don't know what happened, i have not changed any settings since i replied, but i replugged in the drives and it booted from the ssd to windows server 2012
So, i recently bought a Dell PowerEdge R420. I tried putting in my Kingston A400 SSD With Windows Server 2012 installation, and my old Western Digital SATA HDD. But, when i put it in, and tried booting for the first time, it does not boot from any drive. I tried to click everything in BIOS, but when i tried switching AHCI to RAID, it wanted to format all my drives, and i don't wanna do that, and i don't wanna even use RAID. But both drives are detected by BIOS, they both show up in physical disk properties. But then this happened. I put in a usb flash drive with a windows 7 installation media, and it booted just fine, and i didn't even have to set anything in bios. But there were no disks detected in the windows format gui. So what happened?
Poweredge R420 not booting from SATA HDD in AHCI mode