Using my 722 for several years. I have a 1T EHD attached via a powered USB dock. Works well, but hdds fail, so I cloned to a backup 1T drive (both WD green). It is a true clone with the same partition UUIDs etc. Every 4-6 months or sooner when I've made a lot of changes, I power down the dock, remove the hdd and run rsync from my desktop to the clone and then swap that one into the attached 722 dock. The only issue is that the updated hdd is sometimes/often not recognized by the Dish box. Sometimes unplugging and replugging the dock does the trick, but usually I have to shutdown the 722, unplug it (to reset, I suppose), then plug back in and restart. I've wondered why this happens, so I ran #fsck -v /dev/scxx on the hdd and got a "bad superblock" message. I've tried to fix this by sub-ing in backup one, but no success there. Never-the-less, the hdd WILL be accepted after a 722 reset. Not sure what's happening or why? Anything more I can do?