At last, a portable Thunderbolt drive that leeches its power from the Thunderbolt connector itself, just like a USB drive. And you can’t even lose the cable for WD’s new My Passport Pro – it’s built into the unit itself.
The drive comes in 2TB and 4TB sizes, with two spinning hard drive platters inside the box. These drives are configured as RAID 0 aka Scary RAID, which splits your data across two disks for extra speed (you can switch to RAID 1 mirroring for a safer setup if you like).
Transfer speeds run up to 233MB/s, and you can even use it as a boot drive straight out of the box (although to be honest, if you’re buying external RAID drives and installing OS X on them, you can probably handle the two minute job of formatting to HFS+).
Source: Western Digital