My circa 2008 iMac hung up today and wouldn't reboot -- it just hung on boot with the Apple logo and the spinner. I booted the Snow Leopard DVD and ran Disk Utility on the drive. It told me the drive needed repairing but during the repair cycle stopped, and said the drive couldn't be repaired. That I should format it and restore from a backup.
So I did. Or, am doing. The restore from my TimeMachine drive is about 75% done now.
Even if this is successful, I'm nervous. I'm not sure if that drive failure was some sort of uncorrectable filesystem corruption that occured because when the iMac was hung up I hard stopped it with the power button, or if the drive is starting to fail.
I'd like to replace the drive in it just to be on the safe side. Is this hard to do? I couldn't find anything about this procedure on Apple's support web site. If I replace it is there a brand of drive that I should buy or is the OS accepting of anything I put in there? Is it a 2.5" or a 3.5" SATA drive in there?