Occasionally I'm asked when Unitrends will support USB 3.0.
A little background. Today, Unitrends supports USB 2.0 across its family line and for all but our entry-level desktop units we support eSATA as well. USB 2.0 has a amximum raw data transfer rate of 480Mb/s. 320Mb/s is typically the maximum speed seen.
USB 3.0, which was introduced in January, offers a theoretical 5Gb/s, although the specification calls out that 3.2Gb/s is reasonable after protocol overhead.
eSATA operates at 3Gb/s - same as internal SATA.
Okay - now to the answer to the question. We'll support USB 3.0 on a future generation of appliances; there are no plans to support USB 3.0 on our current appliances. The reason is simple - eSATA is currently approximately the speed of USB 3.0.
So in what future generation of appliances will we support USB 3.0? It really comes down to the motherboard manufacturers and when they'll adopt it in general in server-class systems. My best-guess is early 2011 - but it's too early to call at this point.