Summary: I bought this WD5000AAKS 2 years ago. Has been working fine, until two weeks ago, The Windows system started intermittently issuing events 9, 11 and 51 (parity errors on disk drive). I neglected replacing that disk then (I didn't understand which disk drive it was - the PC has 3 drives).
Summary: I can still get it to read data off the disk if I rotate it so that the front of the drive points downwards. I'm guessing maybe this helps the head move out onto the platters?
Pros: I've been using this as my backup hard drive and it's served me well until recently when it all of a sudden started to fail.
Cons: Would have liked it to last longer, but considering it's warrantied for 3 years and I've long since filled it up, I guess I can't complain too much. I do recall hearing the occasional clicking noise for the past couple years which always scared me that the drive was dying. Whether this is related...
Summary: I bought this hard drive to use as a backup harddrive for my Athlon system which had an extra SATA1 port. The drive came with no extra jumper (I guess that is because it is OEM), had to swipe a jumper of another harddrive to jump the OPT1 jumper to make it work with my older SATA1 port.
Summary: my theory is the drive failed because it was exactly aligned along the magnetic force lines stretching between the nearest power pole transformer and the electronic flush mechanism on a neighbor's high-tech loo.
Pros: quiet enough, fast enough, lower power consumption
Cons: bought 4. One failed at around the 3 week point. The usual clicking, spin up/down, drive not seen in bios. RMA'd to western digital, which went fine ('course, you do get a "recertified" drive back).