And that is when I started to notice the mysterious ejections with my long-time Seagate—a change to a newer iMac. I think there is some subtle (?) change in the USB voodoo....
Could be. I've since plugged both OWC drives into the back of the iMac and I'll see what happens. Not only is the TM drive a Seagate, it's the also the only reasonable monitor as it's the only one "always on". The SuperDuper drive is only fired up weekly to do the full backup.
