Storage

SansDigital MobileStor MS2UTN+ RAID Enclosure Review

The SansDigital MobileStor was tested using both eSATA and USB interfaces, to see how the unit scales with both modes.  We also tested RAID 1 and RAID 0 arrays, and compared this performance with an internal SATA hard drive.  We used the same model of hard drive in all tests, to level the playing field.

Hard Drive Performance

Burst (MB/s) Average (MB/s)
MS2UTN+B eSATA RAID 1 79 47
MS2UTN+B eSATA RAID 0 90 87
MS2UTN+B USB RAID 1 26 22
MS2UTN+B USB RAID 0 28 25
Regular internal SATA 120 52

As expected, performance is limited to USB’s interface, but eSATA unleashes the power of your drive array.  If you think you’ll actually need more than 30MB/second of throughput, then you’ll want to stay away from the advanced RAID modes of this enclosure, and simply go RAID 0 or RAID 1 on the entirety of both drives.

To test disaster recovery, we pulled one of the drives out, which essentially simulates a hard drive failure.  The unit immediately starts flashing its LEDs.  When using RAID 1, you can still read and write to the array, but changes will not be mirrored until the array is rebuilt.  As soon as the drive is re-inserted (or a new drive of the same or more capacity is inserted), the enclosure immediately starts rebuilding.  The warning LED switches between red and blue, and it takes a few hours for the rebuild to complete.

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