Similar enclosure solutions exist with eSATA and USB 3.0 interfaces. I use a pair of 4-bay Mediasonic ones here, with Linux+xfs+mhddfs.

With a capable operating system & software, I feel this type of setup is superior to "hardware RAID" (really, firmware RAID) boxes: if the box dies or screws up, the drives are still perfectly readable using any other connection I can find. USB2, USB3, eSATA, direct SATA inside the box, etc.

Cheers