The T4 RAID is now available to Pre-Order, and will be shipping from November 19th 2014.
The T4 is a 4-bay RAID 0, 1, 5 & JBOD device. It accepts both 3.5″ HDDs and 2.5″ SSDs. The maximum storage capacity of the T4 is 20TB with 3.5″ HDDs and up to 4TB with 2.5″ SSDs.
For more information about the T4 please visit the T4 webpage.