Backblaze reports monitoring 359,101 drives in Q2 2026, excluding 3,881 boot drives and 705 others to leave 354,415 production drives for analysis (April 1-June 30). Quarterly totals were 31,553,350 drive days and 1,498 failures, yielding a quarterly annualized failure rate (AFR) of 1.73%, the highest in some time. Lifetime numbers show 353,041 drives, 558,148,607 drive days and 21,609 total failures for a lifetime AFR of 1.41%, a slight uptick. Inclusion thresholds remain >100 drives and >10,000 drive days per model for quarterly reporting, with higher cutoffs for annual and lifetime tables. Two legacy HGST models were retired (4TB and 8TB units), while overall deployments continue to concentrate in 20TB+ drives.
Model-level detail highlights both strong and weak performers. Three Seagate models (ST8000NM000A, ST12000NM000J, ST14000NM000J) had zero failures this quarter and ST16000NM000J had one failure; conversely three outliers exceeded a 6.95% AFR cut: HGST HUH721212ALN604 (12TB) at 7.63% and Seagate ST10000NM0086 (10TB) and ST14000NM0138 (14TB) at 9.33% and 8.26% respectively - attributable mainly to age and low drive counts. Several other models showed AFRs above 3%, skewing the quarter’s average upward. No new drive models were added two quarters running, and the team signals further analysis comparing current CMR HDDs to emerging higher-capacity technologies.
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