Circumstantial I know. CPU: 2009 iMac Corei7 2.8 ghz - 16 Gigs Ram - 1 TB internal drive + multiple externals. Caveats: (1) I'm aware of the hard drive recall affecting certain imacs. I checked the serial of the drive and it was not part of the recall. (2) I still have Applecare coverage for the machine for another year, I will be contacting them first thing tomorrow. (3) The fact that the machine was flawless up until Lion was installed (<9 days ago) may be circumstantial but it may be evidence of problems with that OS. (4) Hard drives are mechanical and can fail at any time for any reason. What happened today: I started a thread in the Lion OS sub-board mentioning certain applications were taking longer and longer to launch - preview for example. Shortly after this I saw another thread where someone mentioned when they saw this discussed repairing disc permissions. Disk Utility couldn't repair them when booting off of a bootable CD. I did manage to get the drive to mount for a time and was able to back up some items I was hoping to keep that were too new to be backed up by time machine and then shortly after that it wouldn't mount anymore. The error basically indicated that I had to back up all data, reformat and reinstall the OS. S.M.A.R.T. status indicated verified so it didn't think the drive was dying but I've seen dying drives on the PC side before indicate S.M.A.R.T. verified just before they died abruptly. What next: I've tried booting off of my self-made Lion boot disc to try and reformat the internal drive to start completely over but now the machine is giving me a gray blank screen at boot and even if I attempt to force boot off of the CD or an external Firewire 800 drive neither makes any difference. I just get a featureless gray screen. I'll probably zap the pram next and if that fails I might just leave it until I can drag it over to Apple tomorrow sometime. So, caveat emptor, etc.