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Mercury Elite Pro Dual mini
Bus-Powered Storage Enclosure

Mac / PC / Chrome / USB 3.1 Gen 2
Portable RAID Powerhouse
Mercury Elite Pro Dual mini is the latest high-performance portable RAID from OWC. Packing dual-drive, USB 3.1 Gen 2 performance into a portable, bus-powered form factor, this is the perfect drive for high demand applications on the go. With ample capacities, no matter where you are, Elite Pro Dual mini delivers the performance and flexibility to meet the most extreme workflow requirements for pros working with rich media content.
RAID for Redundancy. RAID for Performance.
Mercury Elite Pro Dual mini features easily user selectable modes RAID 0 and RAID 1. Choose the configuration that suits your needs. In RAID 0, experience blistering data transfer speeds up to 738MB/s. Or select RAID 1 for greater data redundancy from mirrored disks.
Good Looks meet Great Design.
A rugged aluminum chassis designed for near silent fanless, cooling, keeps your drives protected, cool and quiet everywhere you go. The slimline, side-by-side configuration means Mercury Elite Pro Dual mini fits easily in your laptop or gear bag. And because it's fully bus-powered, Mercury Elite Pro Dual mini is the perfect solution for your portable creative workflow.
Quality You Can Trust
Like all OWC drives, Mercury Elite Pro Dual mini is built to the highest standards of reliability and performance. Because 100% reliability is always the goal, Mercury Elite Pro Dual mini is rigorously quality tested, and backed by an OWC 3 year limited warranty and 24/7 customer support.

Product Specifications:

Software Requirements

  • OS (USB 3.1 Gen 1)
    • OS X 10.7 or later
    • Windows 7 or later
    • Chrome OS
  • OS (USB 3.1 Gen 2)
    • macOS 10.12 or later and Thundebolt 3 interface
    • Windows 8.1 or later
    • Chrome OS
  • Driver
    • Driver not required for OS X
    • Driver not required for Windows
    • Driver not required for Chrome

Hardware Requirements

  • Minimum
    • Mac or PC with a USB 3.1 Gen 1 port (Standard-A or Type-C)
  • Recommended (Best Performance)
    • Mac or PC with a USB 3.1 Gen 2 Type-C port

Bootability 1, 2

  • OS X 10.7 or later

Interface (Chipset) 3

  • (1) USB 3.1 Gen 2 / SATA RAID Controller (ASMedia ASM1352R)

UASP (USB Attached SCSI Protocol) Compliant

  • Yes

Drive(s) Supported

  • (2) 2.5" SATA 6Gb/s drives (drive height up to 9.5mm)
    • SATA revision 3.0 (6Gb/s) compliant
    • Compatible with SATA revisions 2.0 (3Gb/s) and 1.0 (1.5Gb/s)


  • USB 3.1 Gen 2
    • Compressible Data: 633 MB/s Read and 738 MB/s Write
    • Incompressible Data: 689 MB/s Read and 573 MB/s Write
    • Random Read/Write (IOPS): 29K IOPS Read and 31K IOPS Write
  • USB 3.1 Gen 1
    • Compressible Data: 437 MB/s Read and 431 MB/s Write
    • Incompressible Data: 425 MB/s Read and 414 MB/s Write
  • Note(s)
    • Speeds will vary based on drives used, setup, and other factors.

RAID Modes Supported

  • Hardware
  • RAID 0, 1, SPAN, and Independent drive mode

Initial Configuration

  • RAID 0
  • Included Drive Guide software will format the drive for either OS X or Windows


  • Power Supply
    • External UL-listed universal auto-switching
    • AC input: 100 ~ 240V, 50/60Hz
    • DC output:, 12V @ 3A
    • Replacement power supply sold separately
    • Adapter plugs for international use sold separately


  • Environmental (Operating)
    • Temperature (°F) 32° — 107°
    • Temperature (°C) 0° — 42°
  • Environmental (Non-Operating)
    • Temperature (°F) &min;40° — 185°
    • Temperature (°C) &min;40° — 85°


  • 28 mm (1.1 in)


  • 155 mm (6.1 in)


  • 144 mm (5.7 in

Weight (without drives)

  • 0.6 kg (1.25 lbs.)
1. Booting in RAID 0, RAID 1, and SPAN mode are supported without limitation.

2. The following limitations apply when booting in Independent mode: only the disk connected to Port 2 is bootable when both drives are installed. If only one drive is installed, the disk will boot regardless of which port it is connected to. Please check the Assembly Manual & User Guide for more details.

3. If connecting from a computer with USB 3.1 Gen 1 via Standard-A to USB-C adapter cable, the device will function at USB 3.1 Gen 1 speeds. Currently the Mercury Elite Pro Dual mini is not compatible with the USB-C port on the OWC USB-C Dock. Please connect to one of the USB Standard-A ports instead. Performance is identical on all USB ports on the USB-C Dock.
Manufacturer provided specifications for Other World Computing p/n MEMDC2KIT UPC#: 812437023886



  • Mercury Elite Pro Dual mini portable high-performance enclosure
  • 0.5m (18 in) USB Type-C to Type-C cable
  • 0.5m (18 in) USB 3.1 Gen 1 Standard-A to Type-C cable
  • External power supply and power cable1
  • Screw packet
  • Quick Start Guide
  • Assembly manual & user guide (Download Only)

1. May be required for certain older (pre-2012 Macs and various PCs) USB 2.0/3.0 Type A models which may not provide the necessary power via bus.


The best warranty is one you never have to use - but should the need occur - we're proud to provide a superior level of support and service coverage to our customers.

1 Year OWC Enclosure Limited Warranty

OWC is proud to provide a superior level of support and warranty coverage to our customers. Even when not used, we understand the peace of mind afforded by a longer warranty period. OWC's industry leading coverage is a testament to our confidence in the reliability of the solutions that we offer. OWC solutions are engineered to demanding quality standards in order to deliver the most reliable, highest performance available on the market in each storage category.

Customer Ratings

Write a Review 5 / 5 1 out of 1 (100%) reviewers would recommend this product
Verified Buyer Top 50 Contributor
Reviewer: joevt Location: Langley, B.C. Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Excellent quality and performance March 8, 2017 I wanted to buy a drive that can perform faster than 5 Gb/sec. This USB 3.1 gen 2 device does just that.

I've tested this in macOS Sierra. The Apple drivers in Mac OS X El Capitan do not support 10 Gb/sec.

I've connected this device to a AlpineRidge Thunderbolt 3 controller. No issues there.

I've connected this to a ASMedia 1142 PCIe card from Startech. Half the time, System Information.app would say the speed was "Up to 480 Mb/sec". When this happened, the drive performed at USB 2.0 speeds. The other times, it says "Up to 5 Gb/sec" but the benchmarks I tried showed that it was doing more than 5 Gb/sec. Windows 10 had similar issues, but would sometimes show the connection as 10 Gb/sec. I tried two different USB-C cables (one was a Thunderbolt 3 cable). This may be an issue with the ASMedia chip in general, my PCIe card specifically, Apple's XHCI driver, or a combination. I only have one PCIe card and this one USB 3.1 Gen 2 device to test.

I used Black Magic Disk Speed Test.app to test the speed. This will get you some quick ballpark numbers:

USB 2.0 speed: 41.5 MB/s Write, 41.8 MB/s Read USB 3.0 speed: 411.2 MB/s Write, 428.0 MB/s Read USB 3.1 Asmedia 1142: 710.1 MB/s Write, 784.3 MB/s Read USB 3.1 AlpineRidge: 756.3 MB/s Write, 836.5 MB/s Read

Those numbers were from a Skylake PC (4.6 GHz). The USB 3.1 speed was slightly slower in a Mac Pro 2008 using the Asmedia 1142 PCIe card: 660.3 MB/s Write, 740.5 MB/s.

For the SSD's, I used two 1.0TB Mercury Extreme Pro 6G.

I would recommend this item to a friend! Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: shortimer Location: Ellington, Connecticut Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 RAID done right (USB-C) February 1, 2017 Another well designed product from OWC. Returned two tries with a LaCie Rugged RAID 4TB, which is TB2. This USB-C product from OWC just works. The price AND speed w/ RAID is the best per gigabyte compromise available at this moment. Obviously, this is in conjunction w/ the new MBpro design that only has USB-C ports. Highly recommended, because there just aren't many/any choices out there for bus powered 220mbps speed @ 4TB of memory.

I would recommend this item to a friend! This review is from 4.0TB OWC Mercury Elite Pro Dual mini Portable, Performance USB C RAID Solution. Customer Videos:

OWC Mercury Elite Pro Dual mini Bus-Powered Storage Enclosure Mfr P/N: MEMDC2KIT MacSales.com SKU: OWCMEMDC2KIT Dual bay USB 3.1 Gen 2 equipped bus-powered RAID enclosure 1 Year OWC Limited Warranty Ships: Same Day only $89.99
Add to CartOther World Computing MEMDC2KIT In Stock, Click to Buy Now
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