What is the purpose of this post?
The purpose: I was looking for info regarding AHCI on T671. The official bios doesn't let you set AHCI or RAID as the original poster wrote. So after much searching I was able to modify the bios to show SATA options and posted it here so that others looking to solve the same problem can find a solution here. My aim was to enable AHCI to upgrade the machine with SSD.