Hard Drive Stats for Q3 2017 October 26, 2017 byAndy Klein // 113 Comments For the most recent Hard Drive Reliability Statistics, as well as the raw hard drive test data, visit Hard Drive Data and Stats. In Q3 2017, Backblaze introduced both 10 TB and 12 TB hard drives into our data centers, we continued to retire 3 TB and 4 TB hard drives to increase storage density, and we added over 59 petabyte