Product ID: UNI251BMU33
In stock: 224
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.
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.
|Warranty Information||Warranty||2 Years|
|Connector(s)||1 - Drive Connectors||SATA Data & Power Combo (7+15 pin)|
|1 - Host Connectors||USB 3.0 Micro-B (10 pin, SuperSpeed)|
|1 - Drive Connectors||IDE (44 Pin, EIDE/PATA, 2.5" HDD)|
|Environmental||Operating Temperature||0°C to 60°C (32°F to 140°F)|
|Storage Temperature||-20°C to 70°C (-4°F to 158°F)|
|Humidity||0% ~ 90% RH|
|Bus Type||USB 3.0|
|Number of Drives||1|
|Compatible Drive Types||SATA & IDE|
|Number of 2.5 inch bays||1|
|Chipset ID||JMicron - JMS330
JMicron - JMB565
|Indicators||1 - LED Indicators||Drive Power / Activity|
|Packaging Information||Package Height||32 mm [1.3 in]|
|Package Length||13.1 cm [5.2 in]|
|Shipping (Package) Weight||236 g [8.3 oz]|
|Package Width||16.1 cm [6.3 in]|
|Performance||Maximum Data Transfer Rate||5 Gbps|
|Type and Rate||USB 3.0 - 5 Gbit/s|
|Type and Rate||SATA III (6 Gbps)|
|Hardware Raid Supported||No|
|Max Drive Capacity||Currently tested with up to 2TB 7200 RPM hard drives|
|Hot Swap Capability||No|
|Physical Characteristics||Weight of Product||130 g [4.6 oz]|
|Max Drive Height||9.5 mm [0.4 in]|
|Product Length||12.5 cm [4.9 in]|
|Product Width||80 mm [3.1 in]|
|Product Height||17 mm [0.7 in]|
|Software||OS Compatibility||OS independent; No software or drivers required|
|What's in the Box||1 - Included in Package||USB 3.0 SATA/IDE 2.5” Hard Drive Enclosure|
|USB 3.0 Type-A to Micro-B cable|
|4 - Included in Package||Installation screws|
|1 - Included in Package||Screw driver|
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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:
To test your setup components, try the following:
When you test the hard drive and hard drive enclosure, it is recommended that you do the following:
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.
Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.
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:
Before you can access a new or formatted drive in your operating system, you need to initialize it first and then create a partition on the drive. A partition defines an area of the drive to use for storing data. The partition uses a file system (for example, ex-FAT, NTFS, and so on).
Note: You typically only need to initialize a drive if the drive is new. If you cannot find an uninitialized drive in Disk Management, skip the following steps and try to partition your device.
Press the Windows key + R, type compmgmt.msc, and click Run to open Computer Management.
Navigate to Disk Management.
When prompted to, initialize your disk(s). If you are running Windows® 7 or later and are using a drive larger than 2TB, initialize the disk(s) with GPT. If you are running an earlier version of Windows, initialize the disk(s) with MBR. For more information, visit the following FAQ: https://www.startech.com/support/faqs/technical-support?topic=hard-drives#mbr-vs-gpt.
Note: The following steps create an NTFS partition that uses the entire drive space. To use a different file system, select a different option in step 6.
Right-click Unallocated or RAW volume, and select New Simple Volume.
In the New Partition Wizard, click Next.
Select Primary partition.
Leave the partition size set to default, and click Next.
Assign a drive letter or leave it set to the default, and click Next.
Enter the following settings to format the partition:
The new drive should appear in Windows Explorer.
Before you can access a new or formatted drive in your operating system, you need to initialize it first and then create a partition on the drive. A partition defines an area of the drive to use for storing data. The partition uses a file system (for example, HFS+, ex-FAT, NTFS, and so on).
Mac OSX detects a drive that needs to be initialized and automatically prompts you to initialize the drive. If you are prompted to initialize the drive, click Initialize. If you are not prompted to initialize the drive and you cannot find the drive in Finder, you will need to create a partition on the drive.
Note: The following steps create an HFS+ (Mac OS Extended (Journaled)) partition that uses the entire drive space.
To create a partition on a new drive, complete the following:
Navigate to Applications and click Utilities.
Open Disk Utility.
Select the new drive and click the Partition tab.
Click Options and verify that it is set to GUID Partition Table.
Enter a name for the partition.
The drive should now be accessible in Finder.
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