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OWC Mercury Elite Pro Qx2

4-bay add your own drives enclosure kit

Mac / PC / USB 3.0 & 2.0 / FireWire 800 (FireWire 400 Backwards Compatible) / eSATA
The Ultimate Blend of Professional
Performance and Convenience
Install your own set of four matched (same part number) 3.5" Serial ATA (SATA I/II) hard disk drives into this brushed aluminum enclosure with Hardware RAID setting flexibility and experience up to 300MB/s data transfer speed for high performance data storage and redundancy.
User-Selectable Hardware RAID Settings
Thanks to a front panel selector switch, the Mercury Elite Pro Qx2 enables easy configuration of the hardware RAID settings to Span, 0, 1, 5, 10, and JBOD/Independent drive modes – so you can select the best combination of speed, capacity, redundancy.
Span
Combines the capacity of two or more drives of the same size without any RAID data distribution scheme into one logical desktop volume. This mode can combine the capacity of varying size drives based on the lowest capacity drive in the set.
RAID 0 (Stripe)
Data is split into blocks over two or more drives at same time for high speed and large capacity. The ideal RAID setting for demanding video production/editing.
RAID 1 (Mirror)
The same data is written to two drives for highest level of data safety and redundancy.
RAID 5 (Stripe with Parity)
Data is Striped (RAID 0) while incorporating redundancy over three or more drives for the best combination for speed, capacity, and redundancy. The Multi-Interface 4 Bay Enterprise Class Performance RAID Solutions are pre-configured as RAID 5.
RAID 10 (1+0)
Data is Striped (RAID 0) over two Mirrored sets (RAID 1) of drives for fast redundancy.
JBOD/Independent drive operation
Each drive mounts as an individual volume.
Uses four 3.5" SATA hard drives
(Drives not included)
3.5" sata hard drive
OWC NOTE: This drive enclosure requires matching 3.5" Serial ATA (SATA) drive mechanisms for proper RAID mode operation. For recommended hard drives, please click on the product specs tab below.

Click Here for Qx2 Qualified/Recommended HD list

Qualified Hard Drives

Serial ATA drive models OWC has tested and qualified for use with the Qx2: A 'recommended' drive is one that, through our extensive and ongoing evaluation process, we've found to have optimum operational characteristics required for demanding RAID applications.

Note: OWC is always testing new drive models and adds additional models as they become available and have passed our stringent requirements. If you do not see a new drive model listed, please check back in the future for confirmed OWC Qx2 Qualification.

Note: Regardless of drive model used, OWC requires that all drives used match exactly for proper RAID operation.

**NOT RECOMMENDED**
  • Seagate Barracuda 7200.11 series - all models, particularly the 1.5TB 7200RPM model p/n ST31500341AS due to stability and performance concerns.
  • Western Digital Green drives - all models, due to potential critical operational issues attributed to the IntelliPower technology providing inconsistent variable transfer rates.

Includes

  • Mercury Elite Pro Qx2 Multi-Interface 4-Bay RAID Solution
  • 39" High Quality Double Shielded eSATA connecting cable
  • 36" High Quality Double Shielded FireWire 800 connecting cable (9-9 Pin cable)
  • 24" High Quality Double Shielded USB 3.0/2.0 connecting cable
  • Internal UL Listed U.S./International Auto Switching 100 ~ 240v, 50/60Hz input
    12 Volt 8.33 Amp output Power Supply (power cords for International use sold separately).
  • Front panel lock with 2 keys
  • Backup and Utility software available
    • Intech® SpeedTools Utilities™ OEM (For Mac OS 8.6 – X only)
    • ProSoft Engineering® Data Backup for Mac OS X v10.2.8 or later
    • NovaStor NovaBACKUP® for Windows 2000 or later
  • OWC Mercury Elite Pro Qx2 Assembly Manual & User Guide (1.4MB PDF)
  • 1 Year OWC Enclosure Limited Warranty 48-Hour Turnaround Time

Gallery

Product Specifications:

Chipset

  • JMicron 355 / FW800 (1394B) / FW400(1394A) and JMicron 567 3.0 (2.0/1.1 Backwards compatible)

Interfaces Supported

  • eSATA (SATA-II)
  • FireWire 800 (1394B) (FireWire 400 Backwards compatible)
  • USB 3.0 (2.0 Backwards compatible)

RAID / JBOD Support

  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 10
  • NRAID Span
  • Independent
Solutions are pre-configured as RAID 5 for optimum speed, protection & capacity
  • JBOD/Independent Drives: each drive operating as a separate volume.

Not Recommended Drives

  • Seagate Barracuda 7200.11 series – all models, particularly the 1.5TB 7200RPM model p/n ST31500341AS due to stability and performance concerns.
  • Western Digital Green drives – all models, due to potential critical operational issues attributed to the IntelliPower technology providing inconsistent variable transfer rates.
Note: Regardless of drive model used, OWC recommends all drives used in RAID configurations match exactly for proper RAID operation.

Port Configuration

  • eSATA – 1 eSATA port
  • FireWire 800 – (2) 9 pin ports
  • USB 3.0 – (1) 9 pin mini B port

Max Data Transfer Rate

  • eSATA – 300 MB/sec
  • FireWire 800 – 100MB/sec
  • FireWire 400 – 50MB/sec
  • USB 3.0 – 300MB/sec
  • USB 2.0 – 60MB/sec

Port/Interface Bootability

Mercury Elite Pro Qx2 can be used as an external startup drive.

Recommended eSATA Cards

eSATA Extender Cables for Mac Pro
PCIe (PCI Express) for Desktops-
OWC tested and qualified for the
OWC Mercury Elite QX2
PCI for Desktops and Towers
ExpressCard/34 for Laptops

Macintosh System Requirements

  • Minimum Apple G4 processor, 128MB RAM
  • Mac OS 8.6 to 9.2.2, 10.0.x or later and an available FireWire 400 port
  • Mac OS X 10.2.8 or later including 'Mavericks' 10.9.x and an available USB 3.0/2.0, FireWire 800*/400 port, or eSATA port
  • Time Machine® Compatible: Mac OS X 10.5 (version introduced) and later.

Windows System Requirements

  • Minimum Intel Pentium III CPU 500MHz, 128MB RAM
  • Windows XP(64 bit) or later and an available USB 3.0/2.0, FireWire 800*/400, or eSATA port.

Linux Requirements

  • Linux compatible via supported USB and FireWire interfaces.

Software Included

Power Supply

  • Internal UL Listed U.S./International Auto Switching 100 ~ 240v, 50/60Hz input, 12 Volt 8.33 Amp output Power Supply (power cords for International use sold separately).
  • Protection: OCP, OVP, Short

External Case Dimensions

  • 9.65″(D) x 5.31″(W) x 6.96″(H)
  • 245.11mm x 134.87mm x 176.78mm

Enclosure Weight (no accessories)

  • Approximately 8.6 pounds (3.9kg)

Product Manual

Operating Environment:

Temperature

  • (operating) 5°C – 42°C (41°F – 107°F)
  • (non-operating) -40°C – 65°C (-40°F – 149°F)

Relative Humidity

  • (operating) 8% – 90% RH (Non-condensing)
  • (non-operating) 5% – 95% RH (Non-condensing)

Shock

  • 65G 2mS; (non-operating) 175G 2mS

Vibration

  • (operating) 1.0G (5 – 300Hz)
  • (non-operating) 5.0G (5 – 500Hz)

Warranty

1 Year OWC Enclosure Limited Warranty

The best warranty is one you never have to use, but should the need occur – 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.

View more information about the 1 Year OWC Enclosure Limited Warranty

Manufacturer provided specifications for Other World Computing p/n M3QX2KIT0GB UPC#: 794504335057
*The use of FireWire 800 interface while the Qx2 is in RAID 5 setting is not recommended for optimum drive speed performance.

Reviews

Customer Ratings

Write a Review 4.7 / 5 31 out of 34 (91%) reviewers would recommend this product
1 2
Verified Buyer
Reviewer: Anonymous Location: New York, NY Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Excellent Unit, Excellent Service July 24, 2016 I purchased two Mercury Elite Pro units to accommodate back ups and day-to-day work with photos and video. The units have delivered reliable service with one glitch--one drive on one unit failed recently. The warranty in force, I returned the failing drive and had a replacement in hand in short order. The new drive rebuilt as expected from the RAID array. I am very happy with this device. When I need more storage, I will definitely be looking at purchasing another these units.

I would recommend this item to a friend! This review is from 8.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Middle of nowhere Age: 55-65 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 4/5 Gets all those boxes off your desk April 16, 2016 I use the T-bolt version of this device for my active files. It comes with SoftRAID that allows almost complete customization. Recommended if you use multiple work disks. (Using SSDs in RAID 0 yields data access rates almost the same as internal SSD.)

This in contrast is cheaper, slower with USB-3 and best as I can tell gives less flexibility in RAID choices. (You get one and that's it for the whole device.) Would be nice if SoftRAID would work on these USB boxes.

Still they are an excellent value, and I'm using them it as a JBOD device and have multiple backup storage in it (including a complete bootable system). I also have my Time Machine on a huge 6TB drive. I once would have said I'd never fill up such a large drive, but I've been proven wrong many times.

Highly recommended for those needing various storage arrangements and also who can live with a single RAID configuration and don't need highest thru put possible.

(1 star off for RAID limitability.)

I would recommend this item to a friend! This review is from (*) OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 3.0 4-Bay SATA Desktop RAID Enclosure.

Verified Buyer
Reviewer: Anonymous Location: Baltimore Age: 35-44 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 It just works April 11, 2016 it's my working horse for the last 4 years.

This review is from OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 2.0 4-Bay SATA Desktop RAID Enclosure.

Reviewer: Anonymous Location: Dallas, Texas Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 4/5 Improved design, have had both series March 26, 2016 I handle high end creative as a hands-on CD - video / FX, HTML5 animation, image editing and compositing, product design, site authoring, print, packaging, displays, marketing support, etc. — Major projects for leading brands. I stress my hardware to the max. I use a QX2 that is two years old for my main live storage and a second QX2 (a couple of months old, with an improved internal design) for my main backup. The internals of my original enclosure failed after three years (out of warranty) and I replaced it with an identical unit. The drives and content were immediately recognized and everything fired right up. The newer version of the enclosure (which I've had for a couple of months) features an improved internal design and I'm hoping it will far outlast the warranty. A month ago one of the original four drives began to vibrate but the older enclosure did not specify which drive was bad. It simply indicated that there was a problem. After yanking the drives and running Drive Genius on the individual drives, I was not able to tell which one was bad. I'm going to put two of the drives in a spare Mercury Elite Dual and mirror them. If one craps out, I can then know what to use for my next set of wind chimes. Meanwhile, I tried to buy a couple of matching drives for the older enclosure, but the manufacturer had changed hands and dropped that model. The result was that I had to buy a new set of four drives for the older enclosure. Lesson learned, when I bought new drives I bought the same model of Toshibas that were in the new RAID, along with a couple of spares. Make sure you but an extra drive or two in case one drive dies. All four drives must be the same model or you will be stuck with either a JBOD or you'd have to buy a new set of four. As for my very first QX2 - which tanked a couple of years ago, I never actually threw it out. The thing is so solidly built that I might need it to prop up my car for the next oil change.

I would recommend this item to a friend! This review is from 8.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer
Reviewer: Anonymous Location: Sudbury MA Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great RAID solution February 18, 2016 This is a great RAID solution. It matches the style of the MacPros until the 2013 update. Easy to set up, and your choice of RAID configurations. I happened to choose RAID 5, loaded it with 4 x 4TB drives and have a 12TB monster that should take a decade to fill. Ok, maybe just 5 years?

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Torrance, Calif. Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Awesome for Mac, RAID5/RAID1+0 January 10, 2016 Bought two of these since happy with prior purchase of the rack mount version. We're using one as RAID5 with 4x/6TB, and another for audio/video work in RAID 1+0 with 4x/6TB (2+2 stripe+mirror). With our venerable Mac Pros (Xeon, 5,1 era), and eSATA cards these really scream. Great upgrade vs having multiple internal drives.

I did a speed test this weekend just for laughs, while also testing the new OWC Accelsior S card -- I will post these specs on that item as well.

VERY HAPPY WITH THIS PRODUCT -- hence buying a second one. Using Toshiba 4TB in the RAID5 unit, and we're using HGST/NAS Deskstar for the RAID1+0.

BLACKMAGIC DISK SPEED TEST/1.9.16+1.10.16 Music Mac (Mac Pro 5,1; 8 core/Xeon; 32GB DDR3; OSX Yosemite 10.5) -- average read/write**; not peak or low /5GB test -- (1) write 138.8 MB/s || 138.7 MB/s (2) write 165 MB/s || read 233.9 MB/s (3) write 185.4 MB/s || read 237.6 MB/s (4) write 185.4 MB/s || read 378.5 MB/s

(1) = Audio drive, WD Velociraptor 1TB 10K/RPM HD; 3GBS/SATAII-BUS (2) = Boot Drive, 240GB Mercury Electra 6G SSD; 3GBS/SATAII-BUS (3) = OWC Mercury Elite Pro Qx2 RAID(1+0) stripe+mirror (2+2); HGST 6TB Deskstar/NAS 7200RPM x4; external/Newer Technology MAXPower PCIe eSATA 2-Port SATA 6G. (4) = Boot Drive, 240GB Mercury Electra 6G SSD => 6GBS/PCIe 'Mercury Accelsior S' Card

All drives/hardware sourced from OWC/MacSales.

**(NOTE: SSDs use compression for speed, which doesn't work as well with audio/video files, so the "actual" WRITE speed is usually half as much as "advertised" for most A/V work vs small uncompressed files.)

Obviously the SATAIII/6GBS bus speeds up legacy Mac Pro no matter how you slice it, either internal card or external eSATA card.

My setup for PCIe (PCI bus speed 'x') A/4x - OWC Excelsior S w/SSD B/4x - OWC eSATA 6GBS External Card C/16x - UAD2 Quad PCIe D/16x - The base level video card for its era (less heat)

:-) CLS

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Indianapolis, IN Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Performance for Now and Later December 28, 2015 I have a 2010 17" MBP and wanted a high-performance backup solution to replace a very outdated NAS box in my home, as well as TimeMachine/USB 2.0 backups. I can honestly say I've noticed a huge performance increase just going from USB 2.0 to FW800. The next step will be eSATA. What I really like is that I have the additional headroom for USB 3.0 when I'm ready for my next machine. The support had been excellent from MacSales an I wouldn't hesitate to purchase this product or any of the other upgrades I've purchased previously.

I would recommend this item to a friend! This review is from (*) OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 3.0 4-Bay SATA Desktop RAID Enclosure.

Verified Buyer
Reviewer: Anonymous Location: Maryland Age: Over 65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Very capable and fast. December 28, 2015 As usual, OWC supplies solid performance at a fair price and quick delivery. Instructions are easy to follow and accurate. I loaded the unit with 4x2TB of storage that was vital. As my requirement was for 4 individual drives and the default RAID 5 configuration requires reformatting, I was quite anxious about the first power-up. The instructions firmly say that you have to select the individual option. Short bit of breath-holding and my fears were gone. A quiet, fast and versatile storage set was humming beautifully.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: New York Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great drives! Lots of extra storage December 15, 2015 The setup is a little tricky, so be sure to set the little dial to the desired formatting. You do need to put the drives into the case yourself, but that is very easy. Once up and running you have a cool 12 TB os drive space!

This review is from 12.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer
Reviewer: Anonymous Experience Level: Power User
Rating: 4/5 OK November 28, 2015 I have owned several of these units, since when they were USB 2.0 (sloooow by nowadays' standards). The USB 3.0 is quite fast, it's hardware RAID (including RAID 5), and never had trouble with any of these. The problem is that the drives never seem to go to sleep! Not a huge deal for me in particular since I have content on the drives that is continually updated, but otherwise I would have probably returned the unit (say you use it for daily backups or media or other things used only a few times a day). Big bug in my opinion, with many users on discussion boards reporting on this, for years! Should be fixed.

I would recommend this item to a friend! This review is from (*) OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 3.0 4-Bay SATA Desktop RAID Enclosure.

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: New York City Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Excellent quality as always November 21, 2015 Plugged it in and away I go. Great quality as always.

I would recommend this item to a friend! This review is from 8.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer
Reviewer: Anonymous Location: Australia Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Outstanding performance - Nice and quiet. November 20, 2015 I chose to buy the enclosure and the drives seperately. When I selected and installed the drives it just became a fantastic mega drive with all the space under the sun. It is quiet in operation and has the look and feel of real quality. Happy? Unquestionably.

I would recommend this item to a friend! This review is from OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 2.0 4-Bay SATA Desktop RAID Enclosure.

Verified Buyer
Reviewer: Anonymous Owned Product: over 6 months
Rating: 4/5 Haven't used it as much as I had planned November 12, 2015 Ordered this empty box in 2011 and put in 4 2GB drives to give me a 6GB RAID. Ended up using it more for backup purposes than anything else, and up until recently it mostly just sat. Still works fine when I do use it, which is a bit more as of recent days, but it's no SSD.

Did try it with a 2 meter eSATA cable at one point, but eventually figured out that it wasn't terribly reliable that way, so 1 meter eSATA is probably best fit for it.

I would recommend this item to a friend! This review is from OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 2.0 4-Bay SATA Desktop RAID Enclosure.

Verified Buyer
Reviewer: Anonymous Location: Switzerland Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Mercury Elite Pro Qx2 October 16, 2015 I hacked my 2009 imac and added esata to it, so I could edit some video with some sort of speed for a change. When I first connected the Qx2, it was only seeing one disk. After realising I need to push in the little reset button and setting the raid config....Voila!!!! I've had this for a month now and am using Hitachi 7200 disk in it, and so far, its working like a charm. Disk were easy to install, its design is very matching the Mac look, and its super quiet!! Need just a chasis now to hold my backup disk, and I think I'll get this again and use it for that purpose.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Tarpon Springs, FL Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 The RAID drive just works with little effort. July 13, 2015 The drive came packed very securely and was easy to assemble. Once plugged in it backed up my iMac with 3 TB drive and 2TB external and it just sits there and continues to work flawlessly. Very satisfied and I know my photos are safe.

I would recommend this item to a friend! This review is from 12.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer
Reviewer: Anonymous Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 4/5 a quality storage enclosure at a good price April 22, 2015 excellent quality and it looks great with my old mac pro.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Dallas, TX Age: 55-65 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 5/5 Most bang for the buck! March 31, 2015 We bought this unit for saving government forms created by our users that required RAID to endure that a single drive failure would not lose customer data. We access the drive from Windows, Linux, and Mac. It worked perfectly out of the box with four 3TB drives we installed ourselves. It's fast, reliable, and the price point was perfect for our needs. We'd highly recommend this unit to anyone who needs hardware level RAID.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Nashville, TN Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great item for new Mac Pro migration February 13, 2015 When it came time to say goodbye to my 2008 Mac Pro tower, I needed to figure out how to handle the 4 internal hard drives. The OWC Mercury Elite enclosure allowed me to remove the existing drives from my Mac Pro, install them in the enclosure (installation was very easy), connect to my new Mac Pro, and continue with business as usual. The enclosure gives you the option for various RAID set-ups, but I have mine set to run as individual hard drives, one of which is my Time Machine backup disc. Operation of the unit is also very quiet. I'd recommend this item to anyone.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: NJ Age: Over 65 Experience Level: Power User Owned Product: 3-4 months
Rating: 5/5 great backup January 31, 2015 The 12 tb drive is very well built, it is extremely easy to set up in any of several drive modes. It works extremely well as my apple time machine and is connected by fw800. I have several other OWC drives and all are very reliable.

I would recommend this item to a friend! This review is from 12.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer
Reviewer: Anonymous Location: Boston, Ma Age: Over 65 Experience Level: Home User
Rating: 5/5 easy to use January 24, 2015 plug and play set up to boost storage

I would recommend this item to a friend! This review is from 12.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Enterprise Class Desktop RAID.

Verified Buyer
Reviewer: Anonymous Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Good Product at a Good Price December 6, 2014 This Enclosure is great especially for the money. For the people that are complaining about the fan being loud, I find near silent for an enclosure with 4 spinning hard drives. If you are really worried about the noise floor of your working environment put solid state drives in it and it would be near silent. It made me realize how loud some of my other enclosure are.

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: Vancouver, BC, Canada Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Perfect spare bay tray for Thunderbay November 24, 2014 It works, all there is to it.

I would recommend this item to a friend! This review is from OWC Mercury Elite Qx2 / ThunderBay Spare Drive Tray.

Verified Buyer
Reviewer: Anonymous Location: Dubai Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Quality product October 24, 2014 It solved my problem for storage. Amazing quality and value for money. Top of all shipping was blazing fast.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Las Vegas, NV Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Outstanding RAID-5 speed with USB 3 October 17, 2014 I'd initially connected this via Firewire 800 to my personal 2010 MBP 13", daisy chained to another vendor's FW800 single-drive solution. Large file copy speed from the other vendor's drive to the OWC Mercury Elite Pro Qx2 was disappointing - a little bit better than USB 2 speed. Thinking this was probably a limitation of the older Mac's firewire controller (and maybe the other vendor's drive too), I reconnected the OWC Qx2 to my office machine, a Late-2013 MBP Retina 15", via USB 3.0, and copied the same large files (that I'd copied over from personal MBP 13" as a preliminary step) and got an amazing 280 MB/s write rate to the Qx2, as shown by the "disk" pane of Activity Monitor. Perhaps this measurement isn't is accurate as the professional grade tools made for this purpose, but a timer and a bit of arithmetic confirmed the findings.The "large" files were four 6+ GB movie files. Of course, in this latter test, the source device was the built-in PCIe flash storage in the MBPr 15". The Qx2 was configured for RAID-5 for all tests and is the setting I am using for storing my media files. I am very satisfied with this purchase and look forward to upgrading my personal machine soon. Build quality is excellent.

I would recommend this item to a friend! This review is from 16.0TB OWC Mercury Elite Pro Qx2 4 Bay eSATA,FireWire 800+USB 3.0 Hardware Desktop RAID.

Verified Buyer Top 50 Contributor
Reviewer: Anonymous Location: Bella Vista,ar Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great product! October 9, 2014 This encloser works great! Easily setup,great prefomance. If you need a 4 bay encloser and don't need thunderbolt,in my opinion you won't find anything better!

I would recommend this item to a friend! This review is from (*) OWC Mercury Elite Pro Qx2 eSATA,FireWire 800+USB 3.0 4-Bay SATA Desktop RAID Enclosure.