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External RAID system for 2x 2.5" SATA I/II/III SSD and HDD


• External RAID system for 2x 2.5" SATA I/II/III SSD/HDD
• USB 3.1 (Gen 2) host interface up 10 Gbit/s
• Very fast data transfer under RAID 0 mode. Up to 780 MB/s or more!
• HDD capacity unlimited
• Supported RAID level: RAID 0, 1, SINGLE, LARGE
• Supports SATA III, 6 Gbit/s and UASP
• Silent operation - fanless!
• Plug & Play and Hot Swap
• LED for power, HDD in use, access and error
• Windows 7 or higher, MAC OS X 10.5 or higher





External RAID system for 2x 2.5" SATA I/II/III SSD and HDD

Aluminium enclosure for 2x 2.5" SATA HDDs or SSDs

USB 3.1 up to 10 Gbit/s - Backwards compatible to USB 3.0/2.0/1.1

RAID level: 0, 1, SINGLE, LARGE


HotSwap and Plug & Play

LEDs for power, HDD in use, access and error

Small and functional

The IB-2253RD-U31 is a RAID system for two 2.5" SATA III hard drives or SSDs. The RAID modes 0, 1, single, and LARGE are supported and can be set up easily using the switch on the back.

USB 3.1

The USB port has become a standard for PC hardware and the new USB 3.1 standard brings some improvements, such as a transfer speeds of up to 10 Gbit/s. However, the known USB interfaces type-A and Type-B remain with us still and they will be able to reach the USB 3.1 speed with the proper support. The RAID system includes both a USB Type-C™ and USB Type-A cable for maximum compatability with different devices.

Cool passion

The aluminum grid helps in dissipating the heat generated and so the case keeps the HDDs cool even wihtout the use of a fan. Additionally the LEDs indicate operation, use, access and errors of the installed hard disks.

Reviews and Awards

Here you can find some Links to Reviews and Awards
Show all reviews


In our support area you can find our download center, where we provide you with up to date firmware updates, drivers and software for many RaidSonic products. We answer your most frequently asked questions and if the need arises, you could contact our support team directly.

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FAQ's für SOHO/RAID-Solutions
No answer found? Please contact our support team.

IB-RD4320StUS2 - Device switches off after a few seconds

Question: Why turn on the IB-RD4320StUS2 few seconds after switching off by itself?

Answer: Please verify that the IB-RD4320StUS2 is properly connected to your PC. This is a normal behavior of the device when it is not connected by a data cable to the PC. Please connect the USB 2.0 or eSATA cables.

Interesting facts about the new USB 3.1 standard
The USB interface has been the standard for PC hardware and the new USB 3.1 standard entails several improvements. Not only the data transfer rates are much faster but also the charging of smart devices. And finally, the reversible-plug connector is introduced to USB as well.

Compared to USB 3.0 the transfer rates are doubled, thus the USB 3.1 interface achieves speeds of up to 10 Gbit/s which makes the interface fast enough to even max out current SSDs.

Another novelty, the reversible-plug USB Type-C connector, can be plugged into an appropriate USB Type-C connector. Without worrying about its directions, it will fit either way. USB Type-C is able to connect monitors via its USB interface. At the same time, data can flow further using the very same USB port. Theoretically, the transfer rates should suffice to connect 5K monitors which are not yet widely-used.

On top of that the new Type-C connector allows the use of Power Delivery (PD). A feature which provides the possibility to charge devices using up to 100 Watt. Supposably, even notebooks could be charged via USB. In the near future it might even be possible for the new Type-C interface to become the new standard for smartphones, tablets and other smart devices because of the connector's small size.

The already well-established USB 3.0 interfaces Type-A and Micro-B will still be preserved for the future, though, and will also have transfer rates of up to 10 Gbit/s. Whether Type-C is completely going to replace the old-established USB interfaces is yet to be awaited. In the meanwhile, the compatibility between the old USB types and the new Type-C is ensured by already available USB adapters or a PCI-E expansion card. This way the new USB type remains compatible with older PCs or notebooks, even without having Type-C ports.

RaidSonic Support and Service

When you have purchased a product from us our relationship doesn’t end, rather a new kind of relationship will start. It doesn’t matter if you have questions or you want to update an older product or you have a problem (with the product) that we shall solve, you are welcome. By the way, RMA means returnmerchandise authorization. Wenn Sie unter FAQs keine ausreichende Antwort auf Ihre Fragen gefunden haben, ist es vielleicht angebracht, mit unserem Support-Team in Kontakt zu treten.
Entweder per eMail oder per Telefon. In letzteren Fall seien Sie bitte vorbereitet, die Auskünfte, die im eMail-Formular angesprochen werden, am Telefon zu geben.

Support Hotline +49 (0) 4102 468 950

Support Contact

Hotline hours of our RaidSonic service and support team:
Mon, Thu 13:00 - 17:00 | Tue, Wed 10:00 - 12:00 | Fri 13:00 - 15:00


Below you can find general information regarding the product.



Article No:


EAN Code:





RAID System





HDD size (cm):

HDD size (inch):


HDD interface:

2x 2.5" SATA I/II/III

Hot & Swap:


Plug & Play:


HDD height:

HDD capacity:



Windows 7 or higher, MAC OS X 10.5 or higher

External data interface:

1x USB 3.1 (Gen 2) Type-B with UASP support

RAID Level:


Power switch:


Auto rebuilding:



USB 3.1 up to 10 Gbit/s

Power connector:

External wall power supply, Input: AC 100~240 V, 0.3 A Output: 5 V / 1.5 A, 7.5 W


Power, HDD in use, access and error

Box content:

1x RD2253-U31, 1x external wall power supply, 1x USB 3.1 (Gen 2) cable (Type-B to Type-A), 1x screwdriver, 1x set of screws, 1x manual

Packing unit:

20 pcs./carton

Total weight:

9.4 kg/carton

Gross weight (incl. packing):

0.435 kg

Net weight:

0.178 kg


405x315x350 mm

Dimension of packing box:

195x145x65 mm

Dimension of article:

132x92x32 mm

Country of origin:


Import tax: