StarTech.com

USB 3.1 (10Gbps) External Enclosure for Dual 2.5" SATA Drives

Turn two 2.5" SATA SSDs or HDDs into high-performance storage with RAID - for USB-C and USB-A enabled devices

Product ID: S252BU313R

  • Create powerful external storage with a 2-bay enclosure for 2.5” SSD/HDDs
  • Works with both USB-C and USB-A enabled devices, with two cables included
  • Compatible with Thunderbolt 3 USB-C port
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  • Supports USB 3.1 Gen 2
  • Compatible with 5 - 12.5 mm drive sizes, and tested with capacities up to 4TB @ 7200 RPM
  • SATA I/II/III support (up to 6Gbps)
  • Supports RAID 0, 1, Big (Spanning or Concatenation) and JBOD
  • UASP support for enhanced performance
  • Solid aluminum enclosure
  • Fan with speed control
  • Multi-function LED indicators
$165.99 CDN
301+ In stock
In stock
CA: 5 | US: 296
301+
In stock
Where To Buy

Overview

Compact in size but big on performance, this dual-bay enclosure provides powerful external data storage, with ultra-fast data transfer speeds and configurable RAID modes. It’s ideal for small business and home office applications, or top-performing workstations for graphic designers, engineers and other business professionals.

High-capacity storage in a compact design

Create a high-capacity, external data storage solution with support for two 2.5” SSDs/HDDs in a wide range of sizes from 5 to 12.5mm. Tested for compatibility with capacities up to 4TB at 7200 RPM, this aluminum enclosure delivers fast file transfer rates with USB 3.1 Gen 2 performance. It supports SATA I, II and III and is enhanced with UASP to maximize the performance and speed of your SATA III drives. It even has a fan, with built-in speed control, to keep things running smoothly.

Harness the speed of USB 3.1 Gen 2

USB File Transfer Rates diagram shows USB 3.1 Gen 2 at 10 Gbps is twice the speed of USB 3.0  at 5 Gbps

USB 3.1 Gen 2 gives you greater bandwidth and speed, supporting transfer rates of up to 10Gbps - twice the speed of USB 3.0 (USB 3.1 Gen 1) technology. It lets you leverage the high performance of the latest SSDs and hard drives while alleviating bottlenecks in your data transfers.

Includes two USB cables for versatility

The dual-bay drive enclosure comes with two USB cables for flexible use with the latest laptops and tablets equipped with a USB-C™ port, as well as legacy devices. It includes both USB-C to Micro B and USB-A to Micro B cables. The 2-bay enclosure is also compatible with a Thunderbolt™ 3 USB-C port.

Achieve enhanced performance through RAID

Through RAID 0 support, the dual-bay enclosure lets you maximize the performance of your SATA III SSDs to achieve greater file transfer speeds. The dual-bay enclosure also supports RAID 1, Big (Spanning or Concatenation) and JBOD. With multiple RAID options, you can gain increased storage size, performance, or redundancy.

The enclosure is OS independent, requiring no additional software or drivers. The S252BU313R is backed by a StarTech.com 2-year warranty and free lifetime technical support.

Applications

Increase the external storage capacity of your laptop or PC, ideal for the home office or small business

Use extra storage to back-up important files, a great advantage for graphic designers and other business professionals

Technical Specifications

Warranty Information
Warranty 2 Years
Hardware
Bus Type USB 3.1 Gen 2
Chipset ID ASMedia - ASM1352R
Compatible Drive Types SATA
Drive Installation Fixed
Drive Size 2.5in
Fan Bearing Type Sleeve Bearing
Fan(s) Yes
Fans 1 - 30 mm
Interface USB 3.1 Gen 2
Number of Drives 2
Performance
4Kn Support Yes
Max Drive Capacity Tested with drives up to 4TB @ 7200 RPM
Maximum Data Transfer Rate 10 Gbps
MTBF 50,000 hours
RAID Yes
Supported RAID Modes RAID 0 (Striped Disks)
RAID 1 (Mirrored Disks)
BIG (Spanning or Concatenation)
JBOD - (Just a Bunch of Disks)
TRIM Support Yes
Type and Rate USB 3.1 Gen 2 - 10 Gbit/s
UASP Support Yes
Connector(s)
Drive Connectors 2 - SATA Data & Power Combo (7+15 pin)
Host Connectors 1 - USB 3.1 USB Type Micro-B (10 pin, Gen 2, 10 Gbps)
Software
OS Compatibility OS independent; No software or drivers required
Indicators
LED Indicators 1 - Power
1 - Read and Write - HDD1
1 - Read and Write - HDD2
Power
Center Tip Polarity Positive
Input Current 0.6A
Input Voltage 100 ~ 240 AC
Output Current 2A
Output Voltage 12 DC
Plug Type B
Power Consumption (In Watts) 60
Power Source AC Adapter Included
Environmental
Humidity 20~80% 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
Max Drive Height 0.5 in [12.5 mm]
Product Height 2.4 in [60 mm]
Product Length 5.8 in [148 mm]
Product Weight 13.3 oz [378 g]
Product Width 3.2 in [81 mm]
Packaging Information
Shipping (Package) Weight 32.1 oz [910 g]
What's in the Box
Included in Package 1 - USB 3.1 to SATA enclosure
1 - USB C to Micro B cable - 40.25 inches
1 - USB 3.0 A to Micro B cable - 40.25 inches
1 - universal power adapter (NA,EU,UK,ANZ) - 70 inches (cable)
2 - drive trays
2 - allen keys
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.

 

USB 3.1 is the most recent version of the USB (Universal Serial Bus) standard for connecting computers and electronic devices. It is capable of data transfer speeds up to 10Gbps, and while it can use the USB-C connector type, it can also use a variety of other connector types. To achieve USB 3.1 transfer speeds, your USB host connection, cables, and device must all support USB 3.1. USB 3.1 is also known as USB 3.1 Gen 2 (10Gbps). 

USB 3.0 is capable of data transfer speeds up to 5Gbps. USB 3.0 is also known as USB 3.1 Gen 1 (5Gbps).

USB 3.1 is backwards compatible with USB 3.0 and USB 2.0, except in the following scenarios:

  • USB-B 3.1 cables are not compatible with USB-B 2.0 ports.
  • Unless you use an adapter, USB-C ports or cables will not work with USB-A or USB-B ports or cables.
  • Devices that require USB 3.1 transfer speeds of 10Gbps might not work with USB 3.0 or USB 2.0, or you might experience lower transfer speeds and impacted performance.
  • Bus-powered USB devices that requires more power than what USB 2.0 can provide are not compatible with USB 2.0.

For products related to this article, click here.

To transfer data at speeds of 10Gbps, you need to confirm that the following components in your setup support USB 3.1:

  • The USB host connection
  • The USB cable
  • The USB device and any subcomponents (for example, a hard drive docking station and the hard drives in the docking station)

Note: USB 3.1 is also known as USB 3.1 Gen 2 (10Gbps). Devices that support USB 3.1 should have the USB 3.1 symbol on them. If the USB 3.1 symbol does not appear on your USB source or device, refer to the information provided by the manufacturer to confirm whether the USB source or device support USB 3.1.

The included USB cable for this USB 3.1 Gen 2 device has been tested and verified to perform at USB 3.1 Gen 2 speeds of 10Gbps.

Troubleshooting

When you troubleshoot issues with a hard drive enclosure, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Cables
  • Hard drives
  • Hard drive enclosure

To test your setup components, try the following:

  • Use the cables, hard drives, and hard drive enclosure in another setup to see if the problem is with the components or the setup.
  • Use a different cable, hard drive, and hard drive enclosure in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test the hard drive and hard drive enclosure, it is recommended that you do the following:

  • To check Disk Management, press the Windows key + R, type diskmgmt.msc, and press Enter. Check to see if your hard drive is listed.
  • If the hard drive is listed with unallocated space, the hard drive needs to be reformatted. Right-click unallocated and click New Simple Volume. Follow the on-screen instructions to complete the reformatting.​

Note: Formatting a hard drive erases all of the data on it. Make sure that you back up all of your data before you reformat the hard drive.​

  • If the hard drive is listed as healthy but does not have a drive letter, for example, C:, right-click healthy and click Change Drive Letter and Paths. Click Add, assign a drive letter, and click OK.

Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.

In order to rebuild a RAID array, you need to replace a physical drive with an identical drive on the same RAID controller. Although standard RAID levels are generally agreed upon throughout the industry, the implementation varies between manufacturers. RAID arrays are typically not accessible when they are moved to another controller, and data may be unrecoverable if the drives are out of order or have been formatted or accessed by another RAID controller.

If a RAID controller has failed, you should get the exact same model of RAID controller.  

Note: If a drive or drives were damaged, it is possible that the RAID array may be permanently unrecoverable.

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

Rebuild a RAID array

With the following RAID modes, recovery is possible using the same StarTech.com product. Refer to the following table for the appropriate method to use to recover your RAID array.

RAID mode Max # of failed drives Procedure
RAID 1 Only one drive is needed for recovery.
  1. Determine which drive is operational by using the RAID management utility (if available) or test each drive individually on a different hard drive controller (for example, a hard drive docking station or SATA controller).

  2. Replace the failed drive with an identical hard drive.

The array will rebuild and is accessible during the rebuilding process.

RAID 3 Single drive failure will rebuild.
  1. Determine which drive is defective by using the RAID management utility (if available) or with diagnosis LEDs on the controller or enclosure.

  2. Replace with an identical hard drive.

Note: Do not change the order of the drives.

  1. The array may be accessible during the rebuild, but you should let the controller rebuild without interruption so that performance is not compromised.

RAID 5 Single drive failure will rebuild.
  1. Determine which drive is defective by using the RAID management utility (if available) or with diagnosis LEDs on the controller or enclosure.

  2. Replace with an identical hard drive.

Note: Do not change the order of the drives.

  1. The array may be accessible during the rebuild, but you should let the controller rebuild without interruption so that performance is not compromised.

RAID 10 Only one drive in a mirrored set can fail.
  1. Determine which drive is defective by using the RAID management utility (if available) or with diagnosis LEDs on the controller or enclosure.

  2. Replace with an identical hard drive.

Note: Do not change the order of the drives.

  1. The array may be accessible during the rebuild, but you should let the controller rebuild without interruption so that performance is not compromised.

 

If your setup components support USB 3.1 but you are experiencing slower transfer speeds than you expected, consider the following:

  • A USB host connection with multiple USB 3.1 ports might not be able to support 10Gbps on each port simultaneously.
  • The type of port on a device does not determine whether the device is capable of USB 3.1 speeds. A USB-C port might not support USB 3.1 speeds, while USB-A and USB-B ports might support USB 3.1 speeds.
  • Any other devices that you include in your setup, such as an older hard drive in a USB 3.1 enclosure, might create a point of congestion and slow down transfer speeds.

To confirm the functionality of your USB host connection, its ports, and any other devices in your setup, refer to the information provided by the manufacturer.

Note: USB 3.1 is also known as USB 3.1 Gen 2 (10Gbps). Devices that support USB 3.1 should have the USB 3.1 symbol on them. If the USB 3.1 symbol does not appear on your USB source or device, refer to the information provided by the manufacturer to confirm whether the USB source or device support USB 3.1.

USB 3.1 (10Gbps) External Enclosure for Dual 2.5" SATA Drives

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(5 stars) Super fast Data Transfers, True USB 3.1 raid drive

By:
Using XPS 8930, 2xSSDs in Raid 0, large files; Write all day long at 500MB/sec, read 700MB/sec the limited only by the desktop. Excellent external Raid enclosure for two SATA drives.
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(1 star) Slow on USB 3.0

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Should be getting close to 1Gbps with 2x SSD drives Raid 0, only getting around 250Mbps transfer speeds on USB 3.0. Disappointing!
Comment Helpful? Yes - 2 No - 3 Report