AFR – Abbreviation for Annualized Failure Rate. It is the process which measures the probability that a machine or any component of that machine or device will fail during the first year of its usage.

Annualized Failure Rate (AFR) is a preferred predictor of reliability of hard drive. Seagate has migrated to adding an Annualized Failure Rate (AFR) specification to be more clear and precise in reliability descriptions.