I run this disk in secured RAID mode (mirroring) on a 27 "Thunderbolt - display on a 2011 MacBook Air 11" 1.6GHz Intel Core I5 and thus achieved data throughput of about 110 MB / s in the said mode. For me, the disk is fast enough to work with it with Aperture and iPhoto without long waits and can, thanks to mirroring the image data should be secured against loss indeed. Only the price is a little daunting, especially since even added nearly EUR 50 for the Thunderbolt cable.