Adam C. Engst

@adamengst Let us know if you figure it out. I've seen lots of problems like that with USB 3, though not FireWire. http://mjtsai.com/blog/2014/06/18/rocketstor-drive-dock-more-expensive-but-reliable/ …

@mjtsai Did your drives remount after dismounting? That’s what I find weird - it would make more sense if they stayed dismounted.

@adamengst Yes, the drives remounted right away. It's as if they were unplugged and then plugged back in.

@mjtsai That sounds exactly like what I’m seeing. Did yours ever happen while you were watching? Mine are all at night.

@adamengst @mjtsai Did Console logs have any clues?

@adamengst Does your Mac sleep at night, or is it always on?

@dnanian It was staying on, I think, and now it’s sleeping, which seems to have solved the problem.

@adamengst Interesting. Perhaps it needs a bus reset every so often.

@dnanian Yeah, I'm kind of weirded out by it. I take those eject warnings sort of personally because I would never do that. ;-)

@adamengst Yeah, we see them often via support - usually indicates hardware trouble (cable, port, case, power)…sometimes drive.

@dnanian Could be a new hardware problem, since it started recently, but the drive/case/cable is from December and it's bus-powered on UPS

@adamengst A lot of devices on USB? Maybe problems with transient power requirements going over port capacity?

@adamengst It's probably nargles.

@adamengst Could it be something related to 'Power Nap' in OS X Yosemite?

@adamengst Isn’t this what the Jettison utility by St Clair is for?