The Good The Promise Technology Pegasus J4 can house four 2.5-inch internal drives and offers fast performance. It's compact and easy to use.
The Bad The J4 doesn't support RAID 5 or USB 3.0, nor does it include a Thunderbolt cable. You have to open the casing to service its internal drives.
The Bottom Line The Pegasus J4 is currently the only good choice on the market if you're looking for a compact four-bay Thunderbolt storage device.
An unconventional Thunderbolt storage device
If you want a Thunderbolt storage device that can house four 2.5-inch internal drives, there are now two options, the recently reviewed
While the Drobo Mini's drive-bay design is great, the Promise J4 requires you to open its chassis to install and replace its storage drives. On the other hand, the J4 provides better performance and is more affordable.
Still, lacking RAID 5, the J4 is definitely not an ideal four-bay storage solution. It doesn't come with the much-needed Thunderbolt cable, either. But, priced at $400 (no storage included) or $800 with 2TB, the J4 makes a decent investment. If you don't mind bulkier storage devices, check out these alternatives for faster performance, larger capacity, and possibly lower prices.