I recently purchased a Sonnet Tempo X PCI-X card to add four SATA drives to my G5, in order to setup a RAID system. Initially, I got all the hardware installed, and booted up to see all four drives working perfectly. I played around, testing read and write speeds, and everything was fine and dandy. UNTIL....I put the computer to sleep. Upon attemempting to wake it up, i heard the fans start up, but the screen didn't show any activity. Also, my attached iPod didn't show the "Do Not Disconnect" sign, so I assume the computer wasn't actually waking up. So I did a hard restart after a few minutes, and when it booted up, all the drives connected to the PCI-x card were gone. System Profiler didn't even recognize there was a card in the slot it was in. All the drives were spinning, so it wasn't an issue of power. After several restarts, the drives all of a sudden appeared. All four, all working perfectly, operating for hours on end. So I was relieved, and ready to setup the RAID system. I gave it one last restart just to make sure they would stay, and...poof, they disappeared again, PCI-X card and all. Now I'm hesitant to setup the RAID if the drives aren't going to show up. I first thought it was a dead PCI-X card.....but then the drives randomly apeared again. I tried switching it around in the different PCI slots, but to no avail. What gives? I appreciate ANY ideas.