So I have a Mac Pro 3,1 on Mavericks. I have a Apricorn Velocity Solo x2 with a Samsung 840 EVO 1TB. I get great speeds but on occasion, the drive seems to want to wake up occasionally while I'm working. So for about 5 seconds, I get the beach ball. This happens especially if I haven't used the Finder for more than an hour and then try to open a new Finder window. Or maybe it has to do with external drives that are connected that are trying to wake up? Does anyone else have this problem? Or is this normal?