I work at a computer store that sells both dells and custom builds. Since I have worked there, I have seen nearly 10 times as many Western Digital, Maxtor, and Seagate HDs fail than Dells hds, the only two reasons I have been able to come up with is either their power supplies are stable and don't have any power spikes and kill out the drives faster, or that their "tooless" case designs don't mount the HD to the case as firmly, allowing it more vibration absorption.... any ideas on how to increase the lifespan, or decrease the probability of a HD failing I should say?