StarTech 2-Bay USB 3.0 RAID Enclosure with UASP

StarTech 2-Bay USB 3.0 RAID Enclosure with UASP

StarTech 2-Bay USB 3.0 RAID Enclosure with UASP

B&H # STS3520BU33R MFR # S3520BU33ER
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Product Highlights

  • 2 x 3.5" SATA III Drive Bays
  • USB 3.0 & eSATA Interfaces
  • RAID 0, 1, JBOD, & BIG
  • Hardware Controller
  • Plug-and-Play Compatible
  • Built-in Fan
  • UASP Support
  • LED Indicators
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  • 1Description

The black 2-Bay USB 3.0 RAID Enclosure with UASP from StarTech enables you to build a secure RAID array with two 3.5" SATA hard drives with the option to connect it to your computer through either an available USB 3.0 port, at speeds up to 5 Gb/s, or an eSATA port, at speeds up to 6 Gb/s.

The RAID enclosure supports SATA III (up to 6 Gb/s), SATA II (up to 3 Gb/s), and SATA I (up to 1.5 GB/s) transfer speeds, as well as USB 3.0 transfer speeds (up to 5 Gb/s) for fast data transfer and efficient performance from your SATA III drives. When connected through USB, the enclosure supports UASP (USB Attached SCSI Protocol), which offers a tested performance of up to 70% faster read speeds and 40% faster write speeds than a traditional USB 3.0 at peak performance when paired with a UASP-enabled host controller (not included). UASP is supported in Windows 8, Mac OSX (10.8 or above), and Linux. With support for JBOD (individual drives), spanning (combining drive capacities but no redundancy), RAID 0 (performance), and RAID 1 (data redundancy), the enclosure offers several options that enable you to customize your drive arrangement based on your storage requirements.

To help maximize both durability and reliability, the external RAID enclosure features aluminum construction with a built-in 80mm ball bearing fan that helps improve ventilation and maintain a better operating environment for your drives. The HDD enclosure offers a versatile solution for increasing the storage/backup capabilities of your computer, with support for large capacity hard drives (tested up to 4TB). It supports most operating systems, including Microsoft Windows (8/7/Vista/XP/Server 2008/Server 2003), Apple OSX (10.9/10.8/10.7/10.6), Linux, and Google Chrome OS to help ensure compatibility with your computer system.

The RAID enclosure operates using an included 100 to 240 VAC universal power adapter. Also included is a USB 3.0 cable, an eSATA cable, and a rubber foot set.


UASP support (attached SCSI Protocol Specification Revision 1.0)
eSATA or USB host connection
Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gb/s)
Hardware RAID
Plug-and-play compatible
Dual drive bays
Built-in fan


Versatile connectivity options through either USB or eSATA
Time-saving file transfers up to 70% faster than traditional USB 3.0 when used with a UASP-supported host
Achieve greater drive capacity or secure data redundancy with multiple RAID modes
Maximize performance with file transfer speeds up to 6 Gb/s using SATA III
Free lifetime technical support


Business applications that require external RAID storage for data redundancy
Video editing or photography professional/enthusiasts working with very large file sizes
Transfer large files between computers quickly and securely without a network
Scenarios requiring easy storage transferability between different computer systems and large volume external storage for backups/archiving
UPC: 065030853613
In the Box
StarTech 2-Bay USB 3.0 RAID Enclosure with UASP
  • eSATA Cable
  • USB 3.0 Cable
  • Universal Power Adapter (NA/EU/UK) or AU in Australia
  • Rubber Foot Set
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Interface eSATA
    USB 3.0
    Number of Drives 2
    Drive Size 3.5"
    Compatible Drive Types SATA
    Drive Installation Fixed
    Bays Number of Internal Bays: 2
    Fan Built-in
    80 mm
    Bearing Type: Ball bearing
    Chipset ID JM562
    Drive Connectors SATA Data & power combo (7+15-pin) receptacle
    Host Connectors eSATA (7-pin; data) female
    USB 3.0 B (9-pin; SuperSpeed) female
    Type and Rate USB 3.0: 5 Gb/s
    SATA III: 6 Gb/s
    Protocol UASP support
    Port Multiplier Yes
    RAID Yes
    Supported RAID Modes BIG (Spanning or Concatenation)
    JBOD - (Just a Bunch of Disks)
    RAID 0 (striped disks)
    RAID 1 (mirrored disks)
    Maximum Drive Capacity Currently tested with up to 4 TB 7200 rpm hard drive
    Hot Swap Support Yes
    OS Compatibility - Windows 8/8.1 (32/64 bit), 7 (32/64 bit), Server 2008 (32/64 bit), Vista (32/64 bit), Server 2003 (32/64 bit), XP (32/64 bit), 2000
    - Apple Mavericks (10.9) OSX Mountain Lion (10.8), Lion (10.7), Snow Leopard (10.6)
    - Linux
    - Google Chrome OS
    Certification Microsoft WHQL certified
    LED Indicators Enclosure power
    Drive 1 activity
    Drive 2 activity
    Input Voltage 100 to 240 VAC
    Output Voltage 12 VDC
    Output Current 3 A
    Center Tip Polarity Positive
    Plug Type M
    Operating Temperature 41 to 95°F / 5 to 35°C
    Storage Temperature -4 to 122°F / -20 to 50°C
    Humidity 20 to 80% RH
    Physical Characteristics
    Enclosure Type Aluminum and plastic
    Dimensions (L x W x H) 6.9 x 4.4 x 3.3" / 175.3 x 111.8 x 83.8 mm
    Weight 21.9 oz / 620.0 g
    Packaging Info
    Package Weight 3.0 lb
    Box Dimensions (LxWxH) 10.2 x 7.5 x 5.6"
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