StarTech.com

USB 3.0 Universal 2.5in SATA III or IDE Hard Drive Enclosure with UASP - Portable External SSD / HDD

Turn a 2.5” SATA III or IDE HDD / SSD into an external hard drive that connects to your computer through USB 3.0 with UASP

Product ID: UNI251BMU33

  • Broad drive compatibility with support for 2.5in IDE and SATA HDD / SSD
  • Optimal performance with SATA III & UASP support
  • Maximum portability with a small footprint and no external power adapter required
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  • Supports both IDE & SATA 2.5in form factor drives
  • Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps) drives
  • Compatible with PATA / IDE (66/100/133 Mbps) drives
  • USB powered
  • Compatible with USB 3.0/2.0/1.1 (5 Gbps / 480 Mbps / 1.5 Mbps)
  • Plug-and-play installation
$37.99 USD
350+ In stock
In stock
US: 347 | CA: 3
350+
In stock
Where To Buy

Overview

The UNI251BMU33 Universal 2.5in Drive Enclosure lets you turn a 2.5in SATA or IDE hard drive (HDD) or solid-state drive (SSD) into a portable USB 3.0 storage solution.

This versatile enclosure offers a simple solution for re-purposing 2.5in HDDs and SSDs that are no longer in use into convenient external storage. Since the enclosure supports either legacy IDE or SATA drives, you can rest assured that you’ll have the correct option on-hand when it’s time to swap another drive in, without having to worry about compatibility.

To get the most from your SATA III drives and ensure maximum performance and speed, the UNI251BMU33 is enhanced with UASP support. When paired with a UASP-enabled host controller, the enclosure delivers transfer speeds up to 70% faster than conventional USB 3.0. See our UASP testing results below for further details.

Perfect for carrying your external drive along with your laptop, the UNI251BMU33 is USB-powered, so you won’t need to carry around an external power adapter. Plus, the enclosure features a small-footprint design, making it a great solution for on-the-go laptop and desktop users who want to add storage to their computer without taking up much space.

The UNI251BMU33 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

  • Broad drive compatibility with support for 2.5in form factor IDE and SATA hard drives (HDD) and solid-state drives (SSD)
  • Time-saving file transfer speeds up to 70% faster than traditional USB 3.0 when used with a UASP-supported host device
  • Maximum portability with a small footprint and USB power

Applications

Turn an unused IDE (PATA) or SATA hard drive into additional external storage

Access a variety of different drives

Re-purpose an unused SATA or IDE drive as an external hard drive

Externally expand the storage capacity of your portable laptop or Ultrabook™ computer

Technical Specifications

Warranty Information
Warranty 2 Years
Hardware
Bus Type USB 3.0
Chipset ID JMicron - JMS330
JMicron - JMB565
Compatible Drive Types SATA & IDE
Drive Installation Fixed
Drive Size 2.5in
Interface USB 3.0
Number of 2.5 inch bays 1
Number of Drives 1
Performance
Hot Swap Capability No
Max Drive Capacity Currently tested with up to 2TB 7200 RPM hard drives
Maximum Data Transfer Rate 5 Gbps
Port Multiplier No
RAID No
Type and Rate USB 3.0 - 5 Gbit/s
SATA III (6 Gbps)
UASP Support Yes
Connector(s)
Drive Connectors 1 - SATA Data & Power Combo (7+15 pin) Receptacle
1 - IDE (44 Pin, EIDE/PATA, 2.5" HDD) Female
Host Connectors 1 - USB 3.0 Micro-B (10 pin, SuperSpeed) Female
Software
OS Compatibility OS independent; No software or drivers required
Indicators
LED Indicators 1 - Drive Power / Activity
Power
Power Source USB-Powered
Environmental
Humidity 0% ~ 90% RH
Operating Temperature 0°C to 60°C (32°F to 140°F)
Storage Temperature -20°C to 70°C (-4°F to 158°F)
Physical Characteristics
Color Black
Enclosure Type Aluminum
Max Drive Height 0.4 in [9.5 mm]
Product Height 0.7 in [17 mm]
Product Length 4.9 in [125 mm]
Product Weight 4.5 oz [128 g]
Product Width 3.1 in [80 mm]
Packaging Information
Shipping (Package) Weight 8.2 oz [232 g]
What's in the Box
Included in Package 1 - USB 3.0 SATA/IDE 2.5” Hard Drive Enclosure
1 - USB 3.0 Type-A to Micro-B cable
4 - Installation screws
1 - Screw driver
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

Hard drive enclosures require power from your system's USB port. Although you can plug in any standard SATA drive, USB ports only supply a limited amount of power and are not able to power all of the hard drives plugged into the system.

The power capabilities of the USB port combined with the power requirements of the attached hard drive will determine if the hard drive enclosure will work in your setup. The power (in mA) supplied by the USB port must be greater than the requirements of the hard drive.

A USB 2.0 port can supply a maximum of 500 mA (0.5 A), and a USB 3.0 port can supply a maximum of 900 mA (0.9 A).

You can usually find the power requirements of your hard drive in the technical specifications on the label of the hard drive or on the manufacturer's website.

Note: For more information on how to detect an IDE hard drive, visit http://www.startech.com/faq/hard_drive_accessories_ide_detection.

Older IDE drives are not supported by current StarTech.com products. Typically, these drives were made earlier than the mid-to-late 1990s and are smaller than 1 Gigabyte in size.

There are a number of reasons that older IDE drives may not be detected, including the following:

  • The drive uses PIO (Programmed Input/Output) mode and not DMA (Direct Memory Access).

  • The drive is non-ATA or is using an ATA mode that predates the chipset's compatibility (usually older than ATA-4).

  • The sector size is not 512 bytes.

Unfortunately there is no workaround in these situations. An older system or an older IDE controller card must be used to access older IDE drives.

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.

Troubleshooting

Note: If you are using an IDE hard drive 1 Gigabyte in size or smaller, refer to the following FAQ: http://www.startech.com/faq/hard_drive_accessories_minimum_ide_hard_drive_size

If you are unable to detect your IDE (PATA) drive using a StarTech.com product, you may need to change the jumper settings on your drive. The jumpers switch the drive between Master, Slave, and Cable Select for most drives. A jumper is a small plastic piece that slides on top of two pins to electrically short them together.

When it does not mention what IDE drive configuration is required or if there is only one drive in the setup, the drive should be configured as Master. If Master is not working, try using the drive in Cable Select.

There is no standard position for the jumpers on IDE drives. On some drives, the jumper diagram is on the label that is on the top of the drive. On other drives, there are markings on the circuit board for CS, MA, and SL, which means a jumper shorts the pins vertically in that position. For more information, refer to the documentation provided by the manufacturer.

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.

USB 3.0 Universal 2.5in SATA III or IDE Hard Drive Enclosure with UASP - Portable External SSD / HDD

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