Windows 7 Ultimate 62-bit does not even boot if I enabled AHCI mode (in BIOS) for my Barracuda 7200.12 SATA Drive. I have to disconnect the drive (unplugging the cable), then only I see the BIOS. I then go in and change the SATA Drive mode from AHCI to IDE. Only then Windows can boot.
I have the latest version of the BIOS and the latest firmware for my SATA Drive. I looked up both on the internet and this forum and this looked like a known issue for 7200.11 version of the drive but NOTHING shows up for my version (7200.12)
Would really love some help here as this is quite frustrating. Is this drive not compatible with Windows 7 64-bit? Is there another drive that Windows officially supports?