I have A mac pro 2.66 Quad with 8Gb ram. I have 3 Drives: Main: 250Gb Sec: 750Gb Third: 750Gb I installed Office 2008 on my mac and immedeatly after installing i had a Kernel Panic. I reebooted my mac and uninstalled Office. I then noticed my Third Hard Drive was not mounting. Here is what i have done to no avail to correct the problem: 1. Reeboot Machine again 2. Swap Drive Bays (3 Times) 3. Turn Off my Mac OVernight and Put a Box Fan blowing on it to make sure it was cooling. (Extreme wishful thinking i know.. but hey..) After 3 days the Drive showed up again. Has anyone had a similar problem? Is the Drive Bad? Do you think it had somthing to do with the Kernel Panic? Werd up?