It's a bit off but in the ballpark: Google's 2007 study found, based on a large field sample of drives, that actual annualized failure rates (AFRs) for

It's a bit off but in the ballpark: Google's 2007 study found, based on a large field sample of drives, that actual annualized failure rates (AFRs) for individual drives ranged from 1.7% for first year drives to over 8.6% for three-year old drives http://en.wikipedia.org/wiki/Hard_disk_drive_failure http://en.wikipedia.org/wiki/Hard_disk_drive_failure Memory, of course, has other problems: http://www.ewh.ieee.org/r6/scv/rl/articles/ser-050323-talk-ref.pdf http://www.ewh.ieee.org/r6/scv/rl/articles/ser-050323-talk-r...