this private cloud
http://www.askvg.com/how-to-change-sata-hard-disk-mode-from-ide-to-ahci-raid-in-bios-after-installing-windows/
http://en.wikipedia.org/wiki/Native_Command_Queuing
http://superuser.com/questions/471102/change-from-ide-to-ahci-after-installing-windows-8