The oldest HDD in my PC is a Western Digital Caviar Black 640GB WD1001FALS-00E8B0, it's been out of it's 5 years warranty for about 7 weeks. However my old Raptors 36GB & 74GB are still running in relative's PCs, both are out of their 5 years warranty since 2008! Warriors, nothing less.
My oldest is a 40MB hard drive in my Goupil Golf 286 from 1989. My oldest running sata drives are a tie, both from 2008, between a WD Velociraptor 80GB and my Intel x18m 80GB if SSDs count.
Late last year I retired an IDE 40gb maxtor from 2000 that originally came in a pre build with a pentium 2 and 128mb of ram. A few weeks back I retired my (old) primary hdd (Seagate 500gb baracuda) from my main machine that had been thrased 24/7 since 2007. I think my oldest still in use would be 3 external drives WD mybooks from 2006-2008 and an 80gb maxtor from around the same period. I usually move my drives around these days. When I add storage to the server I repurpose the older drives for other purposes. Such as media pc, office pc, or storage on my gaming rig. Or they end up getting rolled into business pcs for a small startup I'm involved with.
I've got some old IDE hard drives running in an old rig i've got running for the children, i'll upgrade my own PC either this year or early next and they'll have my old hardware. They still run pretty well, so I might still find a use for them.
Oldest HDD is my Samsung 103UJ which is, iirc 6 years old now. It is not however, the oldest component in my PC, that honour goes to the PSU...
I've got a toshiba laptop here still running Windows 3.1! I even have the new installation floppy to go with it! No idea on age but it's 200mb
Probably 6-8 years got some very old 500gb drives. They are not really good for anything but storage of films or TV and music though as they are to slow for games.
It's not still running, but the 10MB Seagate in my late grandfather's original IBM XT lasted over 25 years before we binned the whole thing at the end of last decade. Mint Model F keyboard and all. The shame.
I found a 4GB Maxtor IDE drive I popped into an external closure and it still worked. It was in a windows 95 pc previously
I've got a working Psion MC400 which has 2 SSDs from 1989...I've also got 2 working Dolch network analysers from the early ninties that still boot into Windows (95 ); I've not taken them apart yet so I'm not sure what they've got inside After that though is probably a WD Blue 256gb I've had since 2009ish.
Probably either a 160gb raptor drive or the two 150 gb raptor x drives running in a RAID. Coolest looking hard drives ever, I am so sad they don't make larger capacity versions
The current WD Velociraptor is available in capacities up to 1TB: http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-701284.pdf BTW, I had a pair of the very first 36GB Raptors in RAID 0, much faster than the 7200rpm drive they replaced.
How many hours is bad then? My 3TB is showing caution in Crystal at just under 17k, but so is an old 500gig Samsung at just over 17k. The age difference between the two is dramatic! Then I have the classic 1TB Sammy 103UJ with nearly 18k and that's showing as good. What does it all mean?!