I purchased a new Mac Pro 2X2.4MHZ, and I slapped in a new HDD, and a new optical drive. For the first few hours everything was great. Next time I sat at my computer, the drive disappeared! After a couple reboots, and a day later, low and behold, the drive is back. Any ideas, and solutions, and what is going on? I was thinking it was something to do with the sleep or screen saver, but the drives doesn't always come back after a reboot. In fact sometimes as the Mac is coming back on after a re-boot, I see a drive the an "X" over it. ( I am sure stating that my optical drive isn't working for some reason) Please advise. getting very frustrated. Thanks in advance.