Originally Posted by Sasqui
So, mixing and matching the IDE secondary drives are no problem if I setup the OS as RAID or AHCI?
I'm still trying to wrap my head around how the settings affect the drive itself... I assume it's information that is stored on the boot block of the drive that tells the host controller (and OS) how to talk to the drive?
The settings determine what controller the drive interfaces with. Choosing raid places you on the RAID controller which 9 times out of 10 will get you the best performance on the drive, even when not running a real raid array. AHCI/IDE places you on the SATA controller but IDE gives you IDE functionality. IDE should never be selected as its purely for compatibility with older SATA drives. An issue you will not encounter unless you have a drive that is one of the very first SATA drives.
In my experience RAID has always given me the best results 10-20MB more throughput then AHCI. Even with a single drive.