I have had a lot of interest in this topic and should have probably included this in a previous question about "sata raid pci cards". I have an HP a630n P4 that has 4 sata ports. I just replaced the HD with a Maxtor 250 gig drive that states on the box RAID ready. I have been told conflicting information about the ability to put another drive in the machine and configure RAID. Some say that the motherboard must have a RAID Controller and support onboard (i.e. hardware) and others say that the solution is with installing drivers and updating the bios (i.e. software).
Can anyone point me in the correct direction. Can I add a drive utilizing the onboard ports and implement a RAID array or will I only be able to use the additional ports for separate drives (no RAID array).