A couple of months ago my Tersatation began shutting itself down intermittently (3 times in 4 weeks), developed E04 kernel issue that was fixed with firmware upgrade, but still shut itself down occasionally, never when I was around. Last week shut itself down, and when I rebooted, went through error check, cycled through drives, but then hung on drive 1 with clicks every second or so (sounded like the 'click of death", ugh). After speaking with Tech support an RMA was issued and I am awaiting new unit. HOWEVER... I have since discovered that the UPS powering the Terastation had a faulty battery, and was supplying bad power. I plugged the unit in elsewhere, and still got the clicking. I pressed the power button to shut it down, but didn't hold it down log enough, so it stayed on - oddly, when I removed my finger from the power button, the clicking stopped and the unit was up and functioning perfectly. It has not shut itself down in the 2 days since. Hmmm, what to do now? I have a new unit coming. Do I assume that my unit is bad, transfer the data, and return mine? Does anybody know why the power button might have stopped the clicking hard drive? Many thanks in advance for any advice or information.