Yep. I'm afraid I can provide a horror story about every hard disk manufacturer. Gets easier now that Quantum and Maxtor are the same people. My latest was having 2 Seagate drives die within 10 days of each other as part of the same RAID array. Fortunately we got a spare installed in between otherwise it would have been messy.

I've given up trying to find reliable drives, and instead insist only that my RAID arrays are made up of as many different makes as possible, to reduce the risk of near simultaneous disk failure.