Google disk reliability paper
Google released a study of 100,000 consumer-class ATA disk drives that revealed a wealth of information including S.M.A.R.T. data analysis; drive temperature vs. disk failure rates; annualized failure rates; and survival probabilities.
GCN magazine interviewed me for a follow-up article about it. “Similarly, David Lethe, president of diagnostic software vendor SANtools, suggests that” … (well, read the article if you want to know what I said).
The full text of the study can be found at http://labs.google.com/papers/disk_failures.pdf