1. Ultra ATA drives work on older ATA IDE channels.
It's that simple.
2. Serial ATA drives should work but in your case you'll need an adapter card.
I wanted to upgrade my disk, by adding a new hard disk with a greater capacity, it's them when I got confused with the Ultra ATA & Serial ATA, I have no idea which one I can buy/use.
It seems that the Ultra is a more recent technology than serial ATA, is that right?
My disktop is a little bit old, I am using Pentium 3,window xp pro. & I am not sure that the motherboard will support a new technology, or if I have to add something extra to my computer inorder to be able to support the Ultra ATA.
However, if my computer can't support the Ultra ATA, does this mean that I can Use the Serial ATA with no problem, or may be simply my computer is outdated?
Looking forward to receiving your kind reply & help