Brand new 250MB WD Caviar. It was my fault however.
Attempting to put 3.5" to 5.25" adapter brackets on it with the drive standing on its side very near the edge of the table. Took my hands off the drive to retrieve a screw, it tipped over slipped over the edge and fell about 5ft to the floor landing PCB side down. Cracked the PCB in 2 places. Drive never worked again. WD Rep on the phone was nice about it, had the drive replaced only for shipping costs
I've never had a drive actually just up and die on me. All my hardrives have worked perfectly until the day I got rid of them
The oldest hardrive I have is a 20MB Seagate, uses a old interface (ESDI I believe) 5.25" form factor, its loud and gets hot enough to burn flesh. Made before 1989. (The drive was only a year old when I bought it, cannot remember when I bought it though!) Damned thing has been on nearly 24 hrs a day for most of its life and is still going just fine. My grandmother is still using it in her chess/checkers/card games playin 386
