In our data sets, the replacement rates of SATA disks are not worse than the replacement rates of SCSI or FC disks. This may indicate that disk-independent factors, such as operating conditions, usage and environmental factors affect replacement rates more than component specific factors.
quote: I don't think they are so much exaggerated as the term MTBF is just misunderstood.
quote: The Manufacturer runs 1000 drives on a test bed for 1000 hours . If one fails it is 1,000,000 hours MTBF (1000x1000). In reality its a bit more complex, but that is the jist of it. MTBF is not a relative rating on how long your hard drive should last