For the first few days, my new My Book Thunderbolt Duo 6TB seemed to work well on the Macbook Air 2012. However, since yesterday, I always get the “drive was not ejected properly” error when the MBA wakes from sleep. I’m not sure what has changed except that I’ve run the WD drive utility once. I tried uninstalling it and the helper program, but neither that nor reinstalling has changed anything.
When I get the error, the RAID is inaccessible and disk utility hangs immediately after launching. After a hard reboot, the RAID works fine once again.