USB 3.0/eSATA Dual 3.5” SATA III Hard Drive
External RAID Enclosure w/ UASP and Fan – Black
Product ID: S3520BU33ER
The S3520BU33ER 2-Bay RAID Enclosure offers a high-performance external storage solution, enabling
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 or eSATA port.
For fast data transfers and efficient performance from your SATA III drives, the RAID enclosure supports
full SATA III transfer speeds (up to 6 Gbps), as well as full USB 3.0 transfer speeds (up to 5Gbps). When
connected through USB, the enclosure supports UASP, which offers performance up to 70% faster than
conventional USB 3.0 when paired with a UASP-enabled host controller (see our performance below).
With support for JBOD, Spanning, RAID 0, and RAID 1,the enclosure offers several options that enable
you to customize your drive arrangement based on your storage requirements.
To maximize both durability and reliability, the external RAID enclosure features high-quality aluminum
construction with a built-in fan that helps improve ventilation and maintain a better operating
environment for your drives.
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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).
To ensure compatibility with your computer system, the S3520BU33ER supports all of the leading
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™.
It is backed by a StarTech.com 2-year warranty and free lifetime technical support.
Improved Performance with UASP
UASP is supported in Windows 8, Mac OSX (10.8 or above), and Linux. In testing UASP performs with a
70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance.
At the same peak in testing UASP also shows an
80% reduction in required processor resources.
Testing results were obtained using an Intel® Ivy
Bridge system, a UASP enabled StarTech.com
Enclosure, and a SATA III solid state drive.
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Certifications, Reports
and Compatibility
Applications
• 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
Features
• 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 Gbps)
• Hardware RAID
• Plug-and-Play Compatible
• Dual Drive Bay
• Built-in Fan
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Warranty 2 Years
Hardware Chipset ID JMicron - JMS562
Compatible Drive Types SATA
Drive Installation Fixed
Drive Size 3.5in
Fan Bearing Type Ball Bearing
Fan(s) Yes
Fans 1 - 40 mm
Interface eSATA
USB 3.0
Number of Drives 2
Number of internal 3.5 inch bays 2
Performance Hot Swap Capability Yes
Max Drive Capacity Currently tested with up to 4TB 7200 RPM hard drive
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)
Type and Rate USB 3.0 - 5 Gbit/s
SATA III (6 Gbps)
UASP Support Yes
Connector(s) Drive Connectors SATA Data & Power Combo (7+15 pin) Receptacle
Host Connectors eSATA (7 pin, Data) Female
USB Type-B (9 pin) USB 3.0 Female
Software Microsoft WHQL Certified Yes
OS Compatibility OS independent; No software or drivers required
Indicators LED Indicators 1 - Enclosure Power LED
1 - Drive 1 Activity LED
1 - Drive 2 Activity LED
Power Center Tip Polarity Positive
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Input Voltage 100 ~ 240 AC
Output Current 3 A
Output Voltage 12 DC
Plug Type M
Power Consumption (In Watts) 36
Power Source AC Adapter Included
Environmental Humidity 20%RH ~ 80%RH
Operating Temperature 5°C to 35°C (41°F to 95°F)
Storage Temperature -20°C to 50°C (-4°F to 122°F)
Physical
Characteristics
Color Black
Enclosure Type Aluminum and Plastic
Product Height 3.3 in [85 mm]
Product Length 6.9 in [176 mm]
Product Weight 21.9 oz [620 g]
Product Width 4.4 in [113 mm]
Packaging
Information
Shipping (Package) Weight 47.8 oz [1355 g]
What's in the Box Included in Package 1 - USB 3.0/eSATA HDD RAID enclosure
1 - eSATA cable
1 - USB 3.0 cable
1 - universal power adapter (NA,EU,UK)
1 - rubber foot set
1 - instruction manual
Product appearance and specifications are subject to change without notice.
www.startech.com
1 800 265 1844
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