08-09-2013, 07:36 AM
Booted to your SL disk and gone into Disk Utility and found the drive is not seen?
Way, way, way past time to buy a new hard drive - whether that one has failed or not.
There's no doubt in my mind that both OS X and Windows were already running like crap with only 3% free space. And that's probably the last time you checked - no telling what the actual current free space is. A full drive typically is not going to boot either, but it would be seen by Disk Utility.
Replace the internal drive and get OS X installed.
Get either an external case to put the old drive in or a universal USB adapter or caddy to connect the old drive externally to see if you can recover any data from it.
Or a restore from your backup.
****NOTE for others: ****
While our drives have gotten larger and with 1-2-3-4 TB drives we're using now - Rule of thumb - Never run a defrag program on a drive with less than 10% free space - you are only asking for trouble.
PS: And no, the temps you provided should not be an issue.
PPS: You don't really think we're going to go check out all those links do you?
PPPS: Don't want to spend the cash on a drive without discovering if there is some other system board problem with your machine - take it to Apple and have them run a diagnostics on it or with your original disks you can run the Apple Hardware test