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OWC Mercury Elite Pro Dual — Review & Specs | Pricepect | Pricepect

Home External Hard DrivesOWC Mercury Elite Pro Dual

OWC Mercury Elite Pro Dual — image 1

OWC

OWC Mercury Elite Pro Dual

$329.99

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OWCMED3ER7T04.0Silver4.0TB

External Hard Drives

Expert Review Analysis

The OWC OWCMED3ER7T04.0 is a 4 TB Mercury Elite Pro Dual external RAID enclosure featuring two 2 TB 7200 RPM SATA III drives, hardware RAID options, and dual USB‑B 3.2 Gen 1/eSATA connectivity. It delivers up to 442 MB/s read speeds in RAID 0 and is built with an aluminum chassis for quiet, reliable desktop performance.

✓ Best for: Creative professionals, power users, and small studios that need an affordable desktop RAID solution for high‑speed backups, photo/video editing, audio production, and virtual‑machine storage, especially in mixed Mac/PC environments.✗ Not ideal for: Users seeking ultra‑portable storage, native USB‑C or Thunderbolt connectivity, SSD‑level performance, or hot‑swap drive capability; also less suited for field work where weight and size are critical.

Pros

✓Achieves real‑world RAID 0 read speeds of up to 442 MB/s and write speeds of up to 424 MB/s, suitable for fast media transfers.
✓Offers four selectable hardware RAID configurations (0, 1, Span/JBOD, Independent) with a simple front‑panel switch for instant mode changes.
✓

Price History

Current

$329.99

Average

$267.87

Lowest

$249.00

Highest

$329.99

Price trend (90d):+3.1%

Best Seller Rank History

Now#1,234Best#1,202Worst#3,555 -32

Lower = better sales rank

Rating Trend

Rating4.2/ 5Reviews8

Specifications

Accessories

Included CablesUSB 3.0/3.2 cable (24") and eSATA cable

Connectivity

USB InterfaceUSB-B 3.2 Gen 1 (5Gb/s)

eSATA InterfaceeSATA 6G

USB Cable Length610 mm mm

Design

Height135 mm mm

Width71 mm mm

Depth229 mm mm

Weight2500 g g

Chassis MaterialAluminum

Features

RAID Modes0, 1, Span/JBOD, Independent

Shock IsolationYes

General

BrandOWC

ManufacturerOther World Computing

ModelOWCMED3ER7T04.0

ColorSilver

Warranty3 years

Performance

Read Speed442 MB/s MB/s

Write Speed424 MB/s MB/s

Read Speed (Real-world)407-442 MB/s

Write Speed (Real-world)424 MB/s

Power

Power SupplyExternal

Storage

Total Capacity4 TB TB

Drive Count2

Drive Capacity2 TB TB

Drive Type3.5-inch SATA III HDD

RPM7200 RPM RPM

Cooling

Cooling SystemHigh‑efficiency fan with aluminum heat‑dissipating chassis

Shock Protection

Shock IsolationIntegrated shock‑isolating mounts for drive protection

LED Indicators

Front Panel LEDsActivity LEDs display drive status and RAID mode

Warranty

Warranty Coverage3‑year limited warranty with 48‑hour turnaround and 1‑year complimentary data recovery

Dimensions & Weight

Height5.3 inches

Width2.8 inches

Depth9.0 inches

Research Sources

bhphotovideo.com

comx-computers.co.za

eshop.macsales.com

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User Reviews

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4.2

(8 reviews)

Aluminum chassis with high‑efficiency cooling fan provides whisper‑quiet operation while dissipating heat from the 7200 RPM drives.

✓Dual connectivity via USB‑B 3.2 Gen 1 (5 Gb/s) and eSATA 6G gives flexibility for both Windows and Mac environments.

✓Broad OS compatibility (macOS, Windows, Linux) and plug‑and‑play RAID 0 default simplify setup for creative professionals.

Cons

✗USB‑B 3.2 Gen 1 interface caps at 5 Gb/s, which is slower than modern USB‑C or Thunderbolt connections found on newer RAID enclosures.
✗Uses mechanical 7200 RPM HDDs, so maximum throughput is limited compared to SSD‑based RAID kits that can exceed 1 GB/s.
✗Desktop‑oriented dimensions (2.8 × 9 × 5.25 in) and 5.5 lb weight make the unit bulky and less portable for field work.
✗No native USB‑C or Thunderbolt ports, requiring adapters for newer computers that lack USB‑B or eSATA inputs.
✗Lacks hot‑swap drive bays, meaning drives must be powered down before removal or replacement, reducing convenience for frequent swaps.

From Expert Reviews

Praised by Experts

✓Manufacturer and B&H highlight pro‑grade reliability for audio/video production, backups, and virtual machine workloads.
✓Certified performance up to 442 MB/s read with rugged aluminum design tested for quality and shock isolation.

Expert Opinion

Professional sources such as OWC and B&H position the Mercury Elite Pro Dual as a workhorse for creative professionals, emphasizing its reliable aluminum build, hardware RAID flexibility, and certified high‑speed performance for backup and media workflows. While no independent editorial reviews were found, the product is marketed as a pro‑grade solution for audio/video, virtual machines, and large‑file archiving.

How It Compares

vs. OWC Mercury Elite Pro Dual USB‑C

Advantages

✓Higher maximum transfer speeds exceeding 1000 MB/s when paired with SSDs and native USB‑C hub simplifies connection to modern Macs and PCs.

Disadvantages

✗Typically more expensive and may not include HDDs, requiring separate purchase of drives.

Choose the OWC USB‑C model for SSD‑centric high‑speed workflows; choose the USB‑B model for cost‑effective HDD RAID.

vs. WD My Book Duo

Advantages

✓Offers similar dual‑drive capacity with a single USB‑3.2 Gen 1 connection and built-in RAID hardware.

Disadvantages

✗Plastic enclosure with less robust cooling and lower certified speeds (~360 MB/s) compared to OWC’s aluminum design.

Select WD My Book Duo for budget‑friendly storage; select OWC for superior build quality and faster performance.