Updated Aug 19/19
OWC Thunderbolt RAID Enclosures
Scroll down to see available options.
OWC Thunderbay IV Thunderbolt 3 RAID Enclosure
Enclosure Only (0TB) w/SoftRAID RAID 5 - $679 - Open Box $629
OWC updates their very popular 4 bay Thunderbolt enclosure with Thunderbolt 3 ports. Works with 3.5" or 2.5" drives - no adapter is needed. Removable drive trays. With SoftRAID, you can configure the drive array to be JBOD or RAID 0, 1, 4, 5 & 1+0. OWC claims performance of up to 1500 MB/s. Has dual Thunderbolt 3 ports, so you can daisy-chain to other Thunderbolt devices. Just for fun, they also have a DisplayPort 1.2 port, so you can hook up a monitor to the drive array (requires that the drive array always be plugged into the computer though for that monitor to work). Can support 4K displays. Can support hard drives up to 12TB each. Comes with a OWC Thunderbolt 3 cable. You can hook this drive enclosure up to your older Thunderbolt 1 or 2 computer with the Apple Thunderbolt 3 to 2 adapter. Requires Mac OS X 10.12 or later, Windows 10 or later. Dimensions: 5.3"/135mm Wide x 9.6"/245mm Long x 7"/177mm High. Empty the enclosure weighs 8.6 lbs/3.9 kg. Warranty - 1 Year.
OWC Mercury Elite Pro Dual Thunderbolt 2/USB Enclosure V.2 -
$349 - special order
This dual bay enclosure from OWC features hardware RAID 0, 1, or JBOD. Lets you put in two 3.5" SATA drives . Ports - Thunderbolt 2 x 2, USB 3.1 x 1. Dual Thunderbolt ports allow daisy-chaining. Thunderbolt and USB Cable included. Has a fan. Power supply is auto-switching 100-240v. Dimensions 2.8"/7cm W x 9"/23cm D x 5.25"/13 cm T. Warranty is 1 year. Part#OWTB2U3MED0GB.