Backblaze has figured out the biggest predictors of hard drive failure

Cloud storage provider Backblaze continues to share the wealth of information (not to mention hardware designs) it’s learning as it operates its 40,000-hard-drive, 100-petabyte storage service. On Wednesday, it shared its analysis of the 70-plus SMART data attributes that all hard drives report about their performance. Of those, Backblaze’s Brian Beach explained in a blog post, the company use five to predict failures, and the strongest might be related to uncorrectable read errors. “[O]nce SMART 187 goes above 0, we schedule the drive for replacement,” he wrote.