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OWC Gemini Thunderbolt 3 USB-C Dock and Dual-Drive RAID Enclosure

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  • 2 x 2.5"/3.5" SATA III Drive Bays
  • Thunderbolt 3 | USB Type-A | DisplayPort
  • Gigabit Ethernet | UHS-II SD Card Reader
  • Supports RAID 0, 1, JBOD, and SPAN
  • Hardware RAID Controller
  • 60mm Cooling Fan
  • Windows & Mac Compatible

The OWC Gemini Thunderbolt 3 USB-C Dock and Dual-Drive RAID Enclosure is designed with two SATA III drive bays that can accommodate 3.5" hard drives, 2.5" hard drives, and SSDs. This dock will not only help you keep your digital archives organized, but it also has the capacity to help render / process effects and duplicate footage. The Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure by OWC includes two 40 Gb/s Thunderbolt 3 ports (with up to 27W of power), two 5 Gb/s USB-A 3.2 Gen 1 ports, one Display Port, one Gigabit Ethernet port, and a UHS-11 SD card reader. The OWC Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure requires a Thunderbolt 3 host connection.

Additionally, this dock supports RAID configurations of RAID 0 - which provides performance but no data redundancy, and RAID 1, which provides data redundancy at the cost of performance.

Please note that this device must be connected to your host system using Thunderbolt 3 and cannot be used as a NAS. The Ethernet port provides the computer with a network connection over Thunderbolt 3, but cannot be used to access data on the drives over the network.

General Features

Configure to Your Unique Needs

You can customize the Gemini to quickly adapt to project changes and help you stay ahead of deadlines. Install your choice of 2.5" or 3.5" HDDs or SSDs, and even combine the speed of a SSD and with the cost-effective storage capacity of a HDD. With a built-in hardware RAID, you have four drive set-up choices:
  • Non-RAID (JBOD) to keep the drives as independent volumes
  • RAID 1 (mirror) for backup reliability
  • RAID 0 (stripe) for optimal performance and maximum speed or use
  • Span to combine the drive capacities into one huge volume for extra-large storage capacities

Full Stream Ahead

The Gemini features a 1Gb Ethernet port to keep you connected at speeds that leave Wi-Fi in the dust. A must-have for shared workflows and workspaces, Ethernet connectivity speeds up file transfers giving you an edge on your work in progress.

Professional Grade = Ready to Work

OWC understands having confidence in gear reliability is paramount to creative professionals. That's why every Gemini configured solution undergoes OWC's multi-hour drive "burn-in" performance certification procedure prior to shipping. This helps ensure it arrives operating properly and immediately ready for demanding use.

Disconnect In One Click

Available from OWC as a free download, their Dock Ejector software safely disconnects drives in a single click. Designed by OWC hardware and software engineers, Dock Ejector ensures all data is written before disconnection, saving time and protecting against data loss. Use it to move quickly between workstations and get the most out of your OWC Dock.

Display Support

One 5K display @ 60 Hz
One 4K display @ 60 Hz
One 4K display @ 30 Hz
Two 4K displays @ 60 Hz
One 4K display @ 60 Hz and one 4K display @ 30 Hz
In the Box
  • OWC Gemini Thunderbolt 3 Dock and Dual-Drive RAID Enclosure
  • Thunderbolt 3 Cable
  • External Power Supply
  • Power Cable
  • Limited 1-Year Warranty
More Information
Product ConditonNew

OWC Pro Specs


Number of Bays 2 x 2.5"/3.5"
I/O 2 x USB Type-C (Thunderbolt 3 (40 Gb/s))
2 x USB Type-A (USB 3.1 / USB 3.2 Gen 1 (5 Gb/s))
1 x DisplayPort
1 x RJ45 (Gigabit Ethernet)
Compatible Drive Interface SATA III
Media Card Slots SD/SDHC/SDXC
Form Factor Desktop
Bridge Chipset Intel JHL6540
Intel i210ASMedia AS


OS Compatibility macOS 11
macOS 10.15
macOS 10.14
Windows 10
Windows Server 2016
*As of October, 2021: Check with manufacturer for the most up-to-date compatibility


Security Features Kensington Security Slot


AC Input Power 100 to 240 VAC, 50 / 60 Hz at 2.0 A
Power Source AC Adapter


Operating Temperature 41 to 95°F / 5 to 35°C
Operating Humidity 8 to 90%
Storage Temperature -4 to 140°F / -20 to 60°C
Storage Humidity 5 to 95%
Certifications BSMI, CE, FCC, RCM, RoHS, VCCI
*as per Manufacturer


Status Monitoring LED Indicator
Cooling 1 x 3000 rpm 60 mm Fan
Material of Construction Aluminum
Dimensions 9.4 x 5.8 x 3.3" / 23.9 x 14.7 x 8.5 cm
Weight 3.5 lb / 1.6 kg
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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