Link - 1. http://www.extremetech.com/computing/170748-how-long-do-hard-dr
Comment:
Basically matching my personal observation, brand new hard disks (in one
year) have
failure rate about 10%.
Link -2. is more interesting
Quote: http://en.wikipedia.org/wiki/Hard_disk_drive
A study by Carnegie Mellon University[102] and an independent one by Google[
103] both found that the "grade" of a drive does not relate to the drive's
failure rate.