Our Adapter Recommendation
The Hi-Speed IDE adapter from ARP and identical no-name products are designed for all users who want to quickly hook up IDE hard drives without needing to reboot each time. It also powers the board. The additional CD and DVD support makes the Hi-Speed a device you shouldn't be without. It makes an ideal Christmas gift for friends and colleagues; it doesn't cost much but is very useful.
If you're going to go for it, then make sure it's fast. Bottlenecks are only truly negligible when transferring data via Serial ATA. The Lindy's ME-720U2SI takes the winning slot. It offers both Serial ATA for high-end PCs and USB 2.0 for added flexibility.
If you are intending to connect one or more extra hard drives, you'll find a USB/IDE converter makes a cheap and ideal interim solution until you are ready to buy an extra controller. Our model, for example, costs just under $13. Although these adapters do not power an IDE hard drive, that is easily fixed from any PC power supply. Y-cable prices for this purpose start at $3.