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Mediasonic HFR2-SU3S2 PRORAID Box 4 Bay Raid 3.5" SATA Hard Drive Enclosure with USB 3.0 & eSATA

  • Support 3.5" SATA I / II / III HDD up to 6TB per drive
  • Support Single Drive Mode, Raid 0 / 1 / 3 / 5 / 10
  • Transfer rate up to 5.0 Gbps via USB 3.0, up to 3.0 Gbps via eSATA

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Mediasonic HFR2-SU3S2




External I/O
USB 3.0, eSATA
RAID Levels
Single Mode (JBOD), and RAID 0 / 1 / 3 / 5 / 10


3.5" Drive Bays

System Management

OS Supported
Windows XP / VISTA 32 / 64 bit / Windows 7 / Windows 8, 8.1 (with MBR enabled, supports total capacity up to 2TB)
Windows Vista / 7 / 8 / 8.1 32 / 64 bit (with GPT enabled, supports total capacity more than 2TB)
Mac OS 10.3 or later

Mechanical Spec

Power Supply
100V to 240V


Support 3.5" SATA I / II / III hard disk drive up to 6TB per drive, and up to 4 x 6TB.

Support hard drive transfer rate up to SATA II

Hardware Raid controller built-in on board

Transfer rate up to 5.0 Gbps via USB 3.0

Transfer rate up to 3.0 Gbps via eSATA

Power Sync: Power off in synchronization with PC

One button for RAID control

Forced Convection Process

Smart Fan function:
Thermal-Sensor built-in
Auto & Manual mode
3 level of speed

Raid Mode Support:
Raid 0 (Spanning) JBOD
Raid 0 (Stripping)
Raid 1 (Mirroring)
Raid 3 (Stripped set with dedicated parity)
Raid 5 (Striped set with distributed parity)
Raid 10 (Mirroring + Striping)

Dimensions & Weight

6.54" x 4.96" x 8.46"
3.97 lbs. (excluding hard drive)

Package Contents

Package Contents
HFR2-SU3S2 Enclosure
eSATA Cable
USB 3.0 Cable
Power adapter (Universal)
Power cord (US Type)
User manual
Screw driver
HDD Handle
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Mediasonic HFR2-SU3S2

Do you own this product? Write a Review

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  • virtualian
  • 9/18/2015 11:23:02 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsstill ticking along

Pros: Very easy to set up RAID array and has both eSATA and USB3.0 ports. Still ticking along after more than 2 years of use.

Cons: The front faceplate is poorly designed; it really doesn't stay in place. This is just a cosmetic problem, but an annoying one.

Other Thoughts: There's software online that will monitor the health of your RAID array so you don't have to watch the lights for failed drives.

3 out of 3 people found this review helpful. Did you? Yes No

  • N/A
  • 8/13/2015 10:59:31 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsExactly what I needed

Pros: Easy to setup, fast. I've had it for a year now with no issues.

Cons: None after 1 year!

Other Thoughts: I have this connected to an i3 BRiX running kodibuntu and get about 100MB/s across my 1Gbps network.

0 out of 1 people found this review helpful. Did you? Yes No

  • N/A
  • 6/26/2015 2:05:31 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsRuns Like a Top

Pros: The device was purchased at a reasonable cost and the quality is good. The JMicron Hardware RAID Management software is working well also. Setup is easy.

Cons: An internal power supply would be nice but would most likely increase the size of the enclosure.

Other Thoughts: I have been running this enclosure for over a week now with absolutely no problems. I have four Seagate ST4000DM000 4TB drives configured as a RAID 10 array and used as the system backup drive for a Windows 2012R2 server. The ESATA port is being used.

The enclosure is paired with a PCI-E ESATA card, using the ASMEDIA 1061 chipset, in the server.

3 out of 4 people found this review helpful. Did you? Yes No

  • N/A
  • 6/11/2015 2:00:22 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsAmazing for the price and what it does

Pros: I have only tested in JBOD mode, and from reviews of other products I didn't even know if this would work. But so far it is working properly and doing what it should do (I admit that the drives in this had been through a pws fire... so I was curious to see it the drives would even work in this enclosure... they did). This is a very small enclosure to fit 4 drives. I am very happy with its size and portability.

Cons: From reviews, I don't expect this to last and am only using it as a backup solution that will only be powered up every two weeks of so.

Other Thoughts: So far so good. I am using this in a 4 drive spanning mode to span a 2 - 2 - 2 - 4 gb array of wd green drive of various age.

2 out of 2 people found this review helpful. Did you? Yes No

  • agincajin
  • 5/27/2015 7:50:22 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsMediasonic HFR2

Pros: Always works, no issues, low price point

Cons: none after more than a year

1 out of 2 people found this review helpful. Did you? Yes No

  • dandlion
  • 5/22/2015 2:31:59 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

1 out of 5 eggsmeh

Pros: I liked the fact that it offered esata

Cons: power supply reliability. After less than 30 hours of service components gave out on the inside of the box so that it was not a simple swap out a transformer and power cord. Replaceable but not work I should have to do on a box with so few hours.

Other Thoughts: I would power it up when I needed to copy stuff into long term storage and was generally happy with it until the box electronoics developed issues. It no longer powers up and is probably not worth the time money and effort to fix it right.

Manufacturer Response:

Dear customer,

We are sorry that your are having issue with the power board, you may contact our tech support dept at 888-231-7899 or email us at We will look into get your power board replaced if needed

thank you

3 out of 4 people found this review helpful. Did you? Yes No

  • XrX
  • 2/8/2015 9:50:02 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsGreat box but poor software support

Pros: I've been running three of these for over three years without any problems.
One was connected to a Linux server via USB3 and dropped occasionally but it was a USB3 drivers issue not an issue with the box.
They are all now connected via esata to Linux servers, and rock solid with 4x2TB in RAID5 mode.

Cons: Software. Absolutely no Linux support for monitoring the box status.
I'm not sure who is more to blame for this, jMicron or Mediasonic, but it's a pathetic state of affairs.
I don't need or even want a gimmicky skinned front end, I just want to see the status of the box/drives, just give me a command line program to read the status.
If any of these linux machines were desktop machines I'd try installing the jmicron software under Wine, but these are headless servers so all I want is to be able to see the status, and maybe trigger a rebuild (see below).

Other Thoughts: Both times a drive has failed in one of these they've simply disappeared from the Linux server, which I suppose is one way to know a drive has failed.
In both cases I wasn't able to get them start rebuilding to a new drive till I hooked them up (USB) to a Windows laptop running the jMicron software that can be found on Mediasonics forums (make sure you don't allow Windows to initialize the drive since it won't recognize the Linux file system)
Once the rebuild was complete I disconnected from the windows laptop, reconnected the esata cable to the Linux server and was able to remount without a problem...
Not a good scenario if your doing remote support, but sufficient for local systems.

4 out of 4 people found this review helpful. Did you? Yes No

  • N/A
  • 1/31/2015 8:53:44 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsThe box works fine.... when it has power

Pros: I had no problems with getting it set up and running the way it should be. The actual enclosure it self does exactly what I expected it to do.

Cons: The power cord it uses looks and feels incredibly cheap and I've had 2 fail on me now. Plugged into regular outlets, in open air so it wouldn't get overheated. That seemingly didn't work. I've found other devices that use the same brand, Shanpu Power, power supply with similar failures.

Currently waiting for a response from mediasonic about a third or possible refund on the entire thing to get something else.

Manufacturer Response:

Dear customer

thank you for your support with our product, if you have any questions or in need of technical assisstance, please contact our support at or visit our forum at

0 out of 2 people found this review helpful. Did you? Yes No

  • Skicop
  • 8/29/2014 8:06:32 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggssimple

Pros: Compact design and attractive. i was a bit afraid to do this on my own but it was simple to put together and get working. Have not had it for long but so far no problems.

Cons: the power plug being on the side is not the best design. It would be better if it was from the rear. Not really a hinderance just an annoyance if putting flush to a wall on that side.

Other Thoughts: Looking forward to no longer losing data. i got this after having several external hard drives fail....

Did you find this review helpful? Yes No

  • N/A
  • 6/5/2014 4:24:00 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat Little Box!!!

Pros: Small but solid construction. Pleasant LED light arrangement, quiet. Easy setup.

Cons: None noted.

Other Thoughts: Had to replace a failed Sans Digital Raid box that was simply worn out. This one was on sale with a rebate and was the lowest priced alternative available. Super quick shipping from Newegg. Setup was easy and I had everything back up and running in no time. 4X2 TB Seagate drives in Raid 0 yielding about 7450GB of usable space. Reloading media from backup took about 16 hours. If this one lasts three years like the Sans Digital did, I'll be quite satisfied.

1 out of 1 people found this review helpful. Did you? Yes No

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