Icy Dock MB455SPF 5-Bay Internal SATA Drive Enclosure

The Icy Dock MB455SPF is a great choice for someone that needs more hard drive bays or hot-swap capabilities. If you have a RAID array spanning multiple drives, something like this is an excellent idea since it allows you to use as little space as possible, lets you swap out drives on the fly, and provides additional cooling to the drives. - The Review