StarTech.com

Dual-Bay 2.5in Hard Drive Enclosure - USB 3.0 to SATA III 6Gbps with RAID

One high performance storage solution to support two SSD or HDD drives

Product ID: S252BU33R

  • Create a powerful external USB 3.0 storage solution, supporting two 2.5" SSD or HDD drives
  • Sleek, compact design works beautifully with your Mac or PC
  • Transfer files quickly with SATA III (6Gbps) power and USB 3.0 with UASP
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  • Achieve enhanced performance and data redundancy with RAID 0,1, spanning and JBOD
  • Requires only 5V power, allowing flexible power options
  • Works with Windows, Mac, Chrome and Linux (2.4.x and up) systems
  • Easy set-up with no additional drivers and software required
$92.99 USD
84+ In stock
In stock
US: 82 | CA: 2
84+
In stock
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Overview

This USB 3.0 2-bay enclosure for 2.5in drives gives you the performance you want in an external storage system - and features a stylish, compact design that looks great next to your Mac or PC.  Ideal for professional business settings or home offices, it provides a powerful data storage solution for your desktop computer, laptop, Ultrabook™ or Chromebook™.

High capacity, high performance external storage

The dual drive enclosure lets you install two 2.5in SSDs or HDDs (from 5mm to 15mm) to create high capacity external data storage. To maximize the performance and speed of your SATA III (6Gbps) drives, the enclosure is enhanced with UASP delivering up to 70% faster transfer speeds than conventional USB 3.0. (See testing results below.) 

Sleek, compact design with flexible power options

With its compact design and small footprint, this high performance 2-bay enclosure occupies minimal space in your work area

The compact design, small footprint and sleek finish make this enclosure the perfect desktop companion for your Mac or PC.

Requiring only 5V of power, you have the option to power the enclosure through USB alone, without the need for an external power adapter. It can be powered through a single or two USB sources, such as USB chargers or ports on your laptop, depending on your drive set-up. In stationary applications or configurations where more power is desired, a power adapter is included.  The enclosure gives you a convenient, energy-efficient storage solution with flexible storage set-up options - and easy portability.

Increased performance and data redundancy with RAID

Enjoy peace of mind, knowing your files are continually backed up or take advantage of greater speed and capacity offered with a combined solution. The enclosure supports RAID 0, 1, Spanning, and JBOD, enabling you to choose your preferred backup mode. With the convenience of RAID, you can achieve increased size, performance, or redundancy.

The enclosure is compatible with Windows®, Mac®, Chrome OS™ and Linux® systems without having to install additional drivers or software.

Enhanced performance through UASP

This high-performance SuperSpeed USB 3.0 enclosure supports data transfer rates of up to 5Gbps and is enhanced with UASP support, which can deliver ~70% faster read speed and 40% faster write speed over traditional USB 3.0, when paired with a UASP-enabled host.

UASP speed benefit diagram

Note: UASP (USB Attached SCSI Protocol) is supported in Windows 8, 8.1, Server 2012 and Linux kernel 2.6.37 or later. Test results were obtained using an Intel® Ivy Bridge system, StarTech.com add-on USB 3.0 cards, a UASP-enabled StarTech.com enclosure, and a SATA III solid state drive.

The S252BU33R dual-bay enclosure is ruggedly built to deliver long-lasting performance, and is backed by a StarTech.com 2-year warranty and free lifetime technical support.

The StarTech.com Advantage

  • Provides high capacity and high performance external storage
  • Looks great next to your computer with a sleek, compact design
  • Increases storage performance with RAID and UASP

Applications

Increase the external storage capacity of any computer by connecting this external storage enclosure

Take it with your laptop for on-the-go external storage

Add the security of data redundancy by using this enclosure with support for RAID

Backup or archive data from any USB computer

Technical Specifications

Warranty Information
Warranty 2 Years
Hardware
Bus Type USB 3.0
Chipset ID JMicron - JMS561
Compatible Drive Types SATA
Drive Installation Fixed
Drive Size 2.5in
Fan Bearing Type Ball Bearing
Fan(s) Yes
Fans 1 - 40 mm
Interface USB 3.0
Number of 2.5 inch bays 2
Number of Drives 2
Supported Drive Height(s) 5mm
7mm
9.5mm
12.5mm
15mm
Performance
4Kn Support Yes
Hot Swap Capability Yes
Max Drive Capacity Currently tested with up to 2TB 7200 RPM hard drives (4 TB total)
Maximum Data Transfer Rate USB 3.0 - 5 Gbps
Noise Level 21 dBA
RAID Yes
Supported RAID Modes RAID 0 (Striped Disks)
RAID 1 (Mirrored Disks)
JBOD - (Just a Bunch of Disks)
BIG (Spanning or Concatenation)
Type and Rate USB 3.0 - 5 Gbit/s
SATA III (6 Gbps)
UASP Support Yes
Connector(s)
Drive Connectors 1 - SATA Data & Power Combo (7+15 pin) Receptacle
Host Connectors 1 - USB Type-B (9 pin) USB 3.0 Female
Software
OS Compatibility OS independent; No software or drivers required
Indicators
LED Indicators 1 - Power LED
1 - HHD 1 Activity LED
1 - HHD 2 Activity LED
Power
Input Current 0.4 A
Input Voltage 100 ~ 240 AC
Output Current 2 A
Output Voltage 5 DC
Plug Type H
Power Consumption (In Watts) 3
Power Source AC Adapter Included
Environmental
Humidity 10~90% RH
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -10°C to 65°C (14deg;F to 149°F)
Physical Characteristics
Color Black
Enclosure Type Aluminum and Plastic
Max Drive Height 0.6 in [15 mm]
Product Height 3.5 in [90 mm]
Product Length 5.2 in [132 mm]
Product Weight 12.4 oz [350 g]
Product Width 2 in [50 mm]
Packaging Information
Shipping (Package) Weight 25.8 oz [730 g]
What's in the Box
Included in Package 1 - USB 3.0 Dual 2.5” SATA HDD/SSD RAID Enclosure
1 - USB 3.0 cable
1 - USB to Power Cable (Type H Barrel)
1 - Universal Power Adapter (NA/EU/UK/AU)
1 - Installation screw kit
1 - Quick install guide
Supports any operating system.
No additional drivers or software required.

Certifications

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Accessories

Dual-Bay 2.5in Hard Drive Enclosure - USB 3.0 to SATA III 6Gbps with RAID

Customer Reviews

3.2 (4 reviews)
3.2 out of 5 stars
Quality of Product
1.2
Tell us what you think of this product.


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1 - 4 of 4 Reviews

(1 star) Painfully slow with RAID 0

By:
Bought this enclosure to use as a RAID 0 large storage option. Unfortunately it is slower than the base drives by an order of magnitude (14-16MB per second throughput). do not purchase it if you are going to use it for RAID 0.
Comment Helpful? Yes - 1 No - 0 Report
Response from StarTech.com:
Sam, Customer Support
Thank you for your feedback on S252BU33ER. We're sorry for the slow speeds you're seeing and would like to help. There are some factors that could affect how fast your transfers go including how the data is being written on the drives, other operations going on your computer, the speed of the USB port the enclosure is connected to, and others. This, however, may not account for the speeds you're seeing. We recommend contacting us directly so that we can find out the problem and get your setup working as intended as quickly as possible. You can reach our Technical Advisors 24 hours a day, 5 days a week, at 1-800 265-1844 or www.startech.com/chat.

(4 stars) Great Enclosure

By:
I use it with MacOS 10.13.4 in RAID mode for TimeMachine Backup. Works great. Unfortunately no firmware updater for MacOS X available :-(
Comment Helpful? Yes - 0 No - 0 Report

(3 stars) Great Drive But Doesn't Work with 5TB 2.5" Drives

By:
I bought this last week. It's a nice case - compact, light, bus-powered, USB 3.0, takes 15mm 2.5" drives - exactly what I was wanting. Alas, it does not work with 5TB Seagate Barracuda 2.5" drives - and this was not obvious on the Amazon product page. I realise now that it has only been tested with 2TB drives. Gutted! Will there be a firmware update for it that will allow it to use 5TB drives?? I hope so!
Comment Helpful? Yes - 0 No - 0 Report
Response from StarTech.com:
Sam, Customer Support
Thank you for your review of S252BU33R. Although it has only been tested with drives up to 2TB, we don't expect any issues using this enclosure with larger drives. We recommend contacting us directly so that we can find out the problem and get your setup working as quickly as possible. You can reach our Technical Advisors 24 hours a day, 5 days a week, at 1-800 265-1844 or www.startech.com/chat.

(5 stars)

By:
A really nice compact and very reserved design. This is the only drive enclosure I could find that fit 2.5" HDDs and SSDs, with SATA 3 and USB3. Very please with this, coupled with two WD red dives it very fast and runs very cool. The only improvement I would make would be to add a quick release/open latch rather than screw entry.
Quality of Product (5/5)
Comment Helpful? Yes - 1 No - 0 Report