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SANS DIGITAL MobileRAID MR4UT RAID 0, 1, 0+1, 3, 5, JBOD 4 x Hot-Swappable 3.5" Drive Bays USB 2.0 and eSATA 4 Bay SATA to USB2.0 / eSATA Hardware RAID Enclosure

  • SATA 1.5 & 3Gb/s
  • 4 x Hot-Swappable 3.5" Drive Bays
  • RAID 0, 1, 0+1, 3, 5, JBOD
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The MobileRAID MR4UT series is the latest addition that utilizes 400MB/s I/O processor and 128 ECC memory hardware RAID engine, providing over 210MB/s read and 170 MB/s write RAID 5 performance via eSATA interface. The built-in RAID engine also allows the MR4UT to operate on alternative USB or eSATA connections without OS compatibility issues or the need to install drivers.

The MR4UT is a cost-effective solution that utilizes enterprise-level features derived from Sans Digital 16-bay rackmounts. Advance features such as online capacity expansion and RAID migration allows flexible capacity expansion, while minimizing data access downtime during the process. RAID configurations can be configured via the built-in LCD panel or via the embedded IP-based web interface, allowing convenient administration of the MR4UT remotely or locally. In additional to high performance, the MR4UT overcomes the 2TB per volume limitation, fully utilizing the capacity benefit of latest 3TB hard drives. For OS with 2TB limitation, the MR4UT is capable of achieving multi-volume RAID, dividing the hard drives into four sets of RAID volumes, bypassing the capacity limitation.

Learn more about the SANS DIGITAL MR4UT



General Spec

SATA 1.5 & 3Gb/s
External I/O
USB 2.0 and eSATA
RAID Levels
RAID 0, 1, 0+1, 3, 5, JBOD


3.5" Drive Bays
4 x Hot-Swappable

System Management

OS Supported
Windows, Linux and FreeBSD

Mechanical Spec

Power Supply
180W (90V to 256V)

General Spec

4.8" x 9.1" x 6.5"
9 lbs.
Form Factor: Cube

HDD Trays: 4 Hot-Swappable 3.5"

Maximum Capacity: 12TB total storage capacity*
(* The 2TB capacity limitation requires OS support.)

Auto Rebuilding: Yes

Cooling Fan: 3.5" Ball Bearing

Control Interface: Web-Based Ethernet, LCD Panel, RS232

Status Indicators: 5 Drive LEDs & 3 Environment LEDs

Safety Regulations: CE, FCC, UL, RoHS

Over 200MB/s read and 170MB/s write performance.

True hardware RAID design within the enclosure, no driver and no additional RAID controller needed.

Multiple RAID selection, supporting up to four volumes.

Supports SMART, NCQ, and OOB staggered spin-up capable drives.

Automatic insertion / removal detection and rebuild.

Hard drive, fan and temperature failure detectors to ensure system stability.

Web browser-based RAID management via Arc. Http Proxy through RS-232 port for Windows, Linux and FreeBSD enviroments.

Standard Interface. No extra drivers required.

Compact, stylish aluminum design.


Package Contents
MR4UT (1)
Removable Tray Modules (4)
Power Cord (1)
USB 2.0 Cable (1)
eSATA Cable (1)
Quick Installation Manual & CD (1)

Manufacturer Warranty

1 year limited
1 year limited

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the SANS DIGITAL MR4UT

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  • Anonymous
  • 11/16/2009 9:26:35 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month

4 out of 5 eggsGood external RAID

Pros: REAL RAID.. not raid via controller card on your pc.. Works well on esata w/o need of port multiplier. Supports large volumes (over 2TB).. (under windows convert/create partition to GDT to support). Can create 1 RAID5 or 1 RAID 10 then create several volumes (each showing up as a separate lun/physicaldisk.. to support it requires port multiplier or under usb only).
On esata 1.5GB.. performance using crystaldisk is:
RAID5 (using 4x WD 640GB)
SEQ R/W (110/100)
Rand R/W (100/70)
4k Rand R/W (8M/8M (normal single hdd usually .8/4))

Cons: No way to change fan or add memory w/o voiding warranty.

Did you find this review helpful? Yes No

  • Constantine M.
  • 7/16/2009 12:48:19 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggs

Pros: looks good, compact, multiple interface formats, easy set-up, probably the best unit on the market right now.

Cons: high price, power supply is somewhat noisy (high-pitched electronic whine + fan).

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

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