Icy Dock MB622US-2S RAID SATA Enclosure

Hard drives. From my first exciting 20MB drive to the 1TB beast now keeping my backups. And where you have drives you surely have drive enclosures. Here I’ll be looking at the shiny silver and white Icy Dock MB662 RAID enclosure.


The MB662 is not a complicated NAS storage system. It has no web server, no iTunes software, no ethernet port or media server. It does however have a couple of flashing blue lights and this list of features:

  • Supports 2×3.5″ SATA I/II drives
  • Up to 4TB capacity
  • USB 2.0 + eSATA (Silicon Image 5744 chipset)
  • Hardware RAID with six settings
  • No software required
  • Screwless design
  • 40mm adjustable speed fan
  • Hot swappable
  • Compatible with Windows and Mac
  • Supplied with USB and eSATA cables

For this review the MB622 was supplied by Icy Dock and is available to buy from Amazon.

One thing for sure, the Icy Dock MB622 is a very solid piece of kit. In fact, you could probably use it to smash a few rocks. The silver casing is made out of one piece of aluminium, with a metal back plate, and two plastic drive doors on the front. The doors are the least sturdy part of the enclosure, feeling both wobbly and plasticky. However, as you are unlikely to be swinging from them this is less of an issue, and when closed you don’t even notice.

The back consists of a large protruding fan with speed setting, an eSATA and USB socket, a locking hole, a power socket, on/off rocker, ‘reset’ switch, and a series of 3 DIP RAID switches.

Mb662us rear

Most of these sockets and switches are self-explanatory. The RAID DIP switches control the RAID mode:

  • JBOD – drives are independent and show separately
  • BIG (RAID 0) – Both drives are combined into one big volume
  • Fast (RAID 0) – Both drives are stripped together into one big volume, offering the same capacity as BIG, but with increased speed.
  • Safe (RAID 1) – Both drives are mirrored, providing duplicate data on both drives
  • Safe 33 (RAID 1) – Like the standard Safe, but only 33% of the drives are used for RAID 1, with the rest being used for RAID 0
  • Safe 50 (RAID 1) – As expected, 50% is RAID 1 and 50% is RAID 0

The fan speed can be changed using a ‘volume’ control. This control seems to have a fair amount of range, with a lot of it having little effect. While it is great to be able to adjust the noise of the unit, there is no indication as to how this affects the temperature of your drives. Essentially you’ll need to a pick a noise level you are comfortable with (i.e. the same as your computer), and hope this won’t cause overheating.

Icy Dock describe the unit as having an anti-vibration design, which does seem to hold true – there was no rattling during the testing.

Talking of temperature the enclosure itself barely seems to register any change and effectively acts as a big heat sink. The power supply, like most supplies, gets hot quickly and stays hot regardless of whether the drives are in use.

Inserting Drives

This is almost too simple. At the top of the enclosure are two inline switches which, when pressed, pop open the front doors. Pulling the door down will engage a lever system that pushes any existing drive out of the sockets at the back. Inserting a drive really consists of aligning the drive sockets to the correct side, sliding the drive in, and closing the door – all connections are made. Super stuff.

MB662 removal


Sequential Read (MB/s) Sequential Write (MB/s) Random Read (MB/s) Random Write (MB/s)
Icy Dock MB622
1TB 3.5″ Samsung
32.02 26.81 17.92 27.87
340GB 3.5″ WD
106.67 104.58 26.45 74.58
Generic casing
40GB 2.5″ Fujitsu
36.07 32.11 15.77 12.35

All results taken from XBench and averaged over five readings.

So quite a surprising result. As expected the internal SATA drive is significantly faster in all respects. The 2.5″ PATA drive out-performs the MB622 in sequential tests, but is noticeably slower in random speed tests. A comparison with drives over at Small Net Builder shows that these results are maybe not so unexpected. Note that other RAID settings will probably give different results.

Unfortunately I don’t have an eSATA connection, so no results there.

Noise Level

An important factor for anyone considering placing the enclosure in an office or bedroom is the noise level. Naturally this will be affected by your choice of drive.

Full Speed Low Speed
3cm 65dB 44dB
50cm 37dB 29dB
1m 32dB 28dB

At close range the full speed fan is very noisy and, even though the results above suggest otherwise, is noticeable across an average sized room. At the lowest speed the noise is only detectable at close distance.

As mentioned before, there is no indication as to what speed is recommended to cool a drive.

Note that these results are not produced under studio conditions and are just meant to give a representation of the noise levels.

Other Details

Weight 824g (without drives)
Height 134.62mm
Width 60.96mm
Depth 205.74mm
Product Page MB622
Product Datasheet Datasheet
Product Manual MB622 Manual

The unit is supplied with both USB and eSATA cable, power supply, manual, and MB622 enclosure:

Mb662 accessories


All told the MB622 is a nice sturdy little unit and would certainly fit in well with an aluminium Mac setup. Noise levels can be changed from loud to quiet, although there is no temperature feedback to know what is required. With a total capacity of up to 4TB it’s does offer a lot of potential storage space.

In terms of ease-of-use it is simplicity itself. Drives are slotted in, a RAID setting is chosen, and the unit is then available for formatting.

Due to the nature of this review, long-term stability is yet to be ascertained.

4 thoughts on “Icy Dock MB622US-2S RAID SATA Enclosure”

  1. Wow, this looks sweet but $100 for just the enclosure is too steep for me. Was looking for reviews for something basic for backup on my MacBook Pro. And yeah, I remember my first 20M hard drive I had for my Apple II – it seemed like more room than anyone would ever need at the time!

    1. Compared to a lot of RAID enclosures this one is not a bad price, but if you’re after something more basic then there are a lot of single USB/firewire

  2. I use two external drives for storage and backup but that requires two power supplies, two devices powered up. I should look into getting one of these for myself!

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