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We recommend OWC Rack Pro/Desktop 4-Bay Serial ATA/SAS RAID-Ready enclosure w/mini-SAS 6G (Mfr P/N: OWCMRP1UMSAS) from Other World Computing for $279.99 as a suitable alternative.

OWC Mercury Rack Pro

0GB 1U 4 Bay
Rack Storage Solution Kit

External mini-SAS / Mac / PC
  • external mini-SAS
  • Mac
  • PC
OWC affordability, reliability, and ease of use in a single 1U rack space.
Need massive amounts of storage?
The OWC Mercury Rack Pro Storage Solution is a four bay external mini-SAS hard drive enclosure configured as four independent hard drives, up to a maximum capacity of 16.0TB (4.0TB per hard drive mechanism).

The OWC Mercury Rack Pro features a single external mini-SAS interface, to not only reduce cable clutter, but to provide four full channels of data (one per drive) through a single external mini-SAS cable.  It's like having four separate eSATA/SAS cables but in a single package.

Designed specifically to meet the demands of server, audio production, and video production environments, the OWC Mercury Rack Pro four Bay 1U Solutions provide data transfer rates of up to 24Gb/s data rates¹! Using the highest capacity SATA hard drive mechanisms available, and offering Plug & Play simplicity, the possibilities are endless!

Note: OWC Mercury Rack Pro solutions do not include rack rails. If rails are required for your rack setup, OWC has them available. Click Here.
Outstanding Features
Great Performance
Using the fastest SATA drive mechanisms available gives the OWC Mercury Rack Pro mini-SAS 4 Bay 1 U Solutions a solid, performance focused base.  Adding a high-speed external mini-SAS card (not included) further enhances the OWC Mercury Rack Pro providing  some of the fastest drive transfer rates possible, up to 24Gb/s¹!
High Reliability
A Top-Notch design using the best components gives the OWC Mercury Rack Pro an industry leading one year warranty and ensures the series is built to last!
Flexible Form
The OWC Mercury Rack Pro can easily be converted to a desktop form-factor via a Phillips screwdriver by simply removing the rack ears and installing the included anti-skid, vibration dampening feet.
From day one, the OWC Mercury Rack Pro Series has been designed to be everything you'd hope for and more!


  • OWC Mercury Rack Pro 4 Bay 1U Storage Solution
  • Integrated ROHS, CE, and FCC compliant Power Supply
  • Rack Mounting Handles
  • Anti-skid, Vibration Dampening Desktop Mounting Feet
  • Screws for Rack / Desktop Conversion
  • Mercury Rack Pro mini-SAS Assembly Manual & User Guide
  • OWC 1 Year Solution Warranty with 48-Hour Turnaround Time


Product Specifications:

Interfaces Supported

  • Unit provides one (1) External mini-SAS, supporting up to 24Gb/s
  • Enclosure uses 3.5" Serial ATA (SATA) hard drives

RAID / JBOD Support

  • RAID-Ready ² and JBOD; 4 independent drive channels

Drive Rotation Speed

  • Varies with drive mechanisms installed

Drive Cache Size

  • Varies with drive mechanisms installed

Qualified Hard Drives

Serial ATA drive models OWC has tested and qualified for use with the Mercury Rack Pro:

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 Mercury Rack Pro Qualification.

Note: Regardless of drive model used, OWC recommends all drives used in RAID configurations match exactly for proper RAID operation.

  • 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.

Port Configuration

  • external mini-SAS up to 24Gb/s


Max Data Transfer Rate

  • external mini-SAS - up to 24Gb/s (or 2400 MB/sec)

Recommended external mini-SAS Cards

Recommended mini-SAS Connecting Cables

  • When using Passive/passthrough mini-SAS storage solutions equipped with "6G" 6Gb/s (SATA 3.0 Revision) drives, we strongly recommend only using connecting cables of 1 meter or shorter length due to the increased signal integrity requirements of 6G drives. Active storage solutions such as SAS expander systems equipped with 6G drives can utilize mini-SAS connecting cables up to 10 meters in length.

Macintosh System Requirements

  • Mini-SAS cable sold separately: 1M mini-SAS cable is required and available here for use with SATA/SAS 6Gb/s drives due to signal integrity requirements, longer cable lengths are not supported. When using SATA/SAS 3Gb/s drives, longer cable lengths can be used and are available here.
  • external mini-SAS: Macintosh with external mini-SAS via 3rd party controller card interface, (not included). external mini-SAS requires Mac OS X 10.2 or later. Including 'Mavericks' 10.9.x.
  • Time Machine® Compatible: Mac OS X 10.5 (version introduced) and later.

Windows System Requirements

  • Mini-SAS cable sold separately: 1M mini-SAS cable is required and available here for use with SATA/SAS 6Gb/s drives due to signal integrity requirements, longer cable lengths are not supported. When using SATA/SAS 3Gb/s drives, longer cable lengths can be used and are available here.
  • external mini-SAS: Windows with external mini-SAS via 3rd party controller card interface, (not included). external mini-SAS requires Microsoft Windows 2000 or XP.


  • Three (3) 4cm Brushless, whisper quiet, constant speed fans

Power Supply

  • UL Listed U.S./International Adjustable 100 ~ 240v, 50/60Hz, 200W (Max.) input Power Supply (power cords for International use sold separately).

External Case Dimensions

  • 11.9"(D) x 17.3"(W) x 1.7"(H)
  • 30.3cm x 44cm x 4.5cm
  • 11.9"(D) x 17.3"(W) x 2.2"(H) (with feet)
  • 30.3cm x 44cm x 5.5cm (with feet)
  • 11.9"D) x 19.2"(W) x 1.7"(H) (with rack mounting handles)
  • 30.3cm x 48.7cm x 4.5cm (with rack mounting handles)

Enclosure Weight (no accessories)

  • Approximately 10 lbs. (4.5kg)

Product Manual

Operating Environment:


  • Varies with drive mechanisms installed

Relative Humidity

  • Varies with drive mechanisms installed


  • Varies with drive mechanisms installed


  • Varies with drive mechanisms installed


OWC 1 Year Solution 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 OWC 1 Year Solution warranty

Manufacturer provided specifications for Other World Computing p/n OWCMRP1UMSAS UPC#: 736211771254


Customer Ratings

Write a Review 4 / 5 1 out of 1 (100%) reviewers would recommend this product
Verified Buyer
Reviewer: tygarbyte Location: Sydney Age: 35-44 Experience Level: IT Professional Owned Product: 3-4 months
Rating: 4/5 Cheap JBOD storage - not just for MAC can be used for Windows also :-) November 12, 2012 Extended the life of old HP DL360 G4 Server - which was used purely for backup to disk then to tape. Make sure you do your reseach as the limiting factor would be your raid controller and its capability, as the P600 raid controller I used can only address 2TB max due to old hardware limitations.

Transfer speed is very fast as you would expect - depending on what drive you have put into it. In my case I used 2TB Segate Constalation SAS ( drive you find in servers ) cant remember where I read it - but theres an distinct advantage of using SAS drives over SATA when your going to raid it as well as the MTF of the drives is higher.

Currently have only one power supply - more for home / small business. Like to see future model with dual power supply option. Make sure you check power voltage switch on unit before you plug into power. ie if your in 240V countries make sure its on the higher voltage setting.

Led lights flashes when drive is being written to - purple lights makes a nice change in the rack. Had to open it up to look inside just for curiosity sake - soldering job could be neater but it reflects on price - so cant compain there. The case is neatly finished, and hardrives insert in/out smooth. No internal fans for ventations so depending on your setup - it could get veryhot.

Been running solid for over three months inside a datacentre, ie drive been contantly written to daily ( ie 1.5TB rewrittent o drive over a week period ).

If i needed more cheap external storage i would go down this path again.

I would recommend this item to a friend!

¹ Depending on selected drives, RAID setting, and external mini SAS equipped SAS or SATA card.
² RAID drives via software or SATA controller card.
OWC 0GB Mercury Rack Pro Mfr P/N: OWCMRP1UMSAS OWC SKU: OWCMRP1UMSAS 1U 4 Bay Rack Storage Solution Kit Lifetime OWC Limited Warranty
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