I have been unsuccessful in updating my 256GB Samsung 840 EVO to the new (April, 2015) firmware. I downloaded the firmware patch from Samsung, successfully burned the .iso to a CD, booted successfully from the CD, but the Firmware Update Utility hangs on "Scanning --> --> -->..." I've let it sit there for about 30 minutes without having the updater continue. I've seen folks on this board say the whole thing should take only about 5-10 minutes from start to finish. The SSD is connected to the 2010 Mac Pro (5,1) via the second SATA connection in the optical bay, which is a direct connection so it should be fine. I had no problem with updating the same drive with the first firmware patch released a while back. Have others run into this issue? Any ideas on how to proceed?