StarTech.com

USB 3.0/eSATA Dual 3.5 SATA III Hard Drive External RAID Enclosure w/ UASP and Fan – Black

Create an external dual 3.5in HDD SATA RAID array, connected through either USB 3.0 with UASP or eSATA

Product ID: S3520BU33ER

  • 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)
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  • Hardware RAID
  • Plug-and-Play Compatible
  • Dual Drive Bay
  • Built-in Fan
128,99 € EUR exc VAT
128,99 € EUR inc VAT
Not Available
May be in stock with partners
Where To Buy

For more products like this please visit our European online store today!

Overview

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.

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.

UASP Speed Diagram

At the same peak in testing UASP also shows an 80% reduction in required processor resources.

UASP Speed Diagram

Testing results were obtained using an Intel® Ivy Bridge system, a UASP enabled StarTech.com Enclosure, and a SATA III solid state drive.

The StarTech.com Advantage

  • 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 6Gbps using SATA III

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

Technical Specifications

Warranty Information
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
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 85 mm [3.3 in]
Product Length 176 mm [6.9 in]
Product Weight 620 g [21.9 oz]
Product Width 113 mm [4.4 in]
Packaging Information
Shipping (Package) Weight 1355 g [47.8 oz]
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
Supports any operating system.
No additional drivers or software required.

Certifications

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Accessories

Product Support

Frequently Asked Questions

Before You Buy

To determine if your hard drive will work in this enclosure, on the product page, click the Technical Specifications tab, and do the following:

  • Make sure that the enclosure supports the storage size of your hard drive. If the storage size of your hard drive is larger than what the enclosure was tested with, the hard drive will likely still work with the enclosure.
  • Confirm that your hard drive uses the same interface type as the enclosure. For example, IDE, SATA, or M.2.
  • Make sure that the enclosure supports the physical size of your hard drive, such as 2.5 inches or 3.5 inches.
  • Make sure that the enclosure supports the height of your hard drive. For example, 9 mm or 15 mm.
  • Verify that the power consumption of your hard drive doesn’t exceed the power output of the enclosure. If you’re using multiple hard drives, make sure that the combined power consumption of all of the hard drives doesn’t exceed the power output of the enclosure.

Note: Not all StarTech.com devices support each of the RAID modes described below. For more information on the RAID modes that your device supports, refer to the manual or the StarTech.com product page.

Redundant Array of Independent Disks (RAID) is a virtual disk technology that combines multiple physical drives into one unit. RAID can create redundancy, improve performance, or do both.

RAID should not be considered a replacement for backing up your data. If critical data is going onto a RAID array, it should be backed up to another physical drive or logical set of drives.

The following are terms that are normally used in connection with RAID:

  • Striping: data is split between multiple disks.
  • Mirroring: data is mirrored between multiple disks.
  • Parity: also referred to as a checksum. Parity is a calculated value used to mathematically rebuild data.

Different RAID levels exist for different application requirements.

Refer to the following table for the list of RAID modes offered by some StarTech.com products:

RAID mode Description Operation Advantages Disadvantages Recovery
RAID 0 Striped disks Data is split evenly between two or more disks. Large size and the fastest speed. No redundancy. If one or more drives fails, this results in array failure.
RAID 1 Mirrored disks Two or more drives have identical data on them. A single drive failure will not result in data loss. Speed and size is limited by the slowest and smallest disk. Only one drive is needed for recovery.
RAID 3 Striped set with dedicated parity Data is split evenly between two or more disks, plus a dedicated drive for parity storage. High speeds for sequential read/write operations. Poor performance for multiple simultaneous instructions. A single drive failure will rebuild.
RAID 5 Striped disks with distributed parity Data is split evenly between three or more disks. Parity is split between disks. Large size, fast speed, and redundancy. The total array size is reduced by parity. A single drive failure will rebuild.
RAID 10 1+0; Striped set of Mirrored Subset Four or more drives are made into two mirrors that are striped. Larger size and higher speed than RAID-1, and more redundancy than RAID-0. No parity. Only one drive in a mirrored set can fail.
JBOD Just a Bunch Of Disks Any number of drives are accessed independently by the operating system. Software RAID modes can be used. Hardware RAID may have better performance. N/A
Big Spanning or Concatenation Data is written on one drive until it is full, and then the next drive(s) until it or they are full. Creates a very large and simple array.

No redundancy.

N/A
Clone RAID 1 + Spare

Two drives have identical data, plus one drive is used for rebuilding in case of a primary array failure.

Seamless operation when one drive fails in a RAID-1 array. Spare drive is not accessible to the user. Only one drive is needed for recovery.