USB 3.0 / eSATA Dual-Bay Trayless 3.5 SATA III Hard Drive Enclosure with UASP – 2-Bay SATA 6 Gbps HDD Enclosure
Connect two hot-swappable 3.5" SATA III hard drives to your computer externally through USB 3.0 with UASP or eSATA
Product ID: S352BU33RER
The S352BU33RER 2-Bay RAID enclosure lets you build an external RAID array with two 3.5” SATA hard drives, and connect to your computer through USB 3.0 or eSATA.
For fast performance and efficient data transfers, the enclosure supports SATA III transfer speeds -- up to 6 Gbps when connected through eSATA. The versatile RAID enclosure can also be connected through USB 3.0, with support for UASP, performing up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller. See our UASP testing results below for further details.
The external RAID enclosure features a hardware RAID controller, supporting JBOD, Spanning, RAID 0, and RAID 1 -- to achieve greater drive capacity, or secure data redundancy. The RAID controller is also front mounted for ease of access when changing your RAID mode.
For fast and easy drive installation and removal, the dual drive enclosure features a convenient trayless system that eliminates having to mount and fasten your drives, saving time and hassle.
To ensure compatibility with your computer system, the S352BU33RER 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™.
The S352BU33RER 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.
- Build an external RAID 1 array for data redundancy, to protect against drive failure when working with important data
- Externally work with very large files securely in video editing or photography applications
- Quickly transfer large data files from your computer to a secure external RAID enclosure
The StarTech.com Advantage
- Versatile connectivity options, through either USB or eSATA
- Maximize performance, with file transfer speeds up to 6Gbps using eSATA
- Achieve greater drive capacity or secure data redundancy with a built-in hardware RAID controller
|Bus Type||USB 3.0|
|Chipset ID||JMicron - JMS562|
|Compatible Drive Types||SATA|
|Fan Bearing Type||Sleeve Bearing|
|Fans||1 - 70 mm|
|Front Door Key Lock||Yes|
|Interface||USB 3.0 & eSATA|
|Number of Drives||2|
|Number of internal 3.5 inch bays||2|
|Air Flow Rate||12.72 CFM|
|Hot Swap Capability||Yes|
|Max Drive Capacity||Currently tested with up to 4TB 7200 RPM 3.5" hard drives per bay (8TB total) and 2TB 5900 RPM 2.5" hard drives (2TB total)|
|Maximum Data Transfer Rate||6 Gbps|
|Noise Level||26.24 dBa|
|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)|
|Drive Connectors||2 - SATA Data & Power Combo (7+15 pin) Receptacle|
|Host Connectors||1 - USB Type-B (9 pin) USB 3.0 Female|
|1 - eSATA (7 pin, Data) Female|
|OS Compatibility||OS independent; No software or drivers required|
|LED Indicators||1 - HDD 1 Activity|
|1 - HDD 2 Activity|
|1 - RAID LED|
|Input Voltage||100 - 240 AC|
|Output Current||3 A|
|Output Voltage||12V DC|
|Power Consumption (In Watts)||36|
|Power Source||AC Adapter Included|
|Operating Temperature||5°C to 35°C (41°F to 95°F)|
|Storage Temperature||-20°C to 50°C (-4°F to 122°F)|
|Product Height||11.8 cm [4.6 in]|
|Product Length||21.5 cm [8.5 in]|
|Product Width||13 cm [5.1 in]|
|Weight of Product||1.8 kg [4.1 lb]|
|Package Height||18.7 cm [7.4 in]|
|Package Length||30.1 cm [11.9 in]|
|Package Width||20.8 cm [8.2 in]|
|Shipping (Package) Weight||2.9 kg [6.3 lb]|
|What's in the Box|
|Included in Package||1 - USB 3.0/eSATA Dual 3.5" SATA HDD Trayless Enclosure|
|1 - eSATA Cable|
|1 - USB 3.0 Cable|
|2 - Drive Bay Keys|
|1 - Universal Power Adapter (NA/UK/EU)|
|1 - Instruction manual|
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 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.||
|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.|
Compliance and Safety
- If product has an exposed circuit board, do not touch the product under power.
- If Class 1 Laser Product. Laser radiation is present when the system is open.
- Wiring terminations should not be made with the product and/or electric lines under power.
- Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
- Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
* Product appearance and specifications are subject to change without notice.