{
  "slug": "backblaze-q1-q2-2026-afr-shift",
  "title": "Backblaze drive model AFR, Q1 versus Q2 2026",
  "kind": "dataset",
  "summary": "Side-by-side published annualized failure rates for 33 hard-drive models in Backblaze's Q1 2026 (January 1 to March 31) and Q2 2026 (April 1 to June 30) Drive Stats model tables. 31 models appear in both. Fleet AFR in the published totals rows rose from 1.24% (1,030 failures, 30,203,180 drive days) to 1.73% (1,498 failures, 31,553,350 drive days). Vendor claim; Backblaze's own fleet, not an industry sample.",
  "license": "Derivative table transcribed from Backblaze Drive Stats reports for Q1 2026 and Q2 2026. Cite Backblaze if you use it. You are solely responsible for how you use it. Backblaze's dataset page allows sale of derivative works and forbids selling the Drive Stats data itself. This CSV is a small derived comparison, not Backblaze's daily SMART archive, and that archive is not for sale.",
  "licenseUrl": "https://www.backblaze.com/cloud-storage/resources/hard-drive-test-data",
  "sourceUrl": "https://www.backblaze.com/blog/backblaze-drive-stats-for-q2-2026/",
  "accessed": "2026-10-09",
  "rowCount": 33,
  "columns": [
    { "name": "mfg", "type": "string", "description": "Manufacturer label as published by Backblaze: HGST, Seagate, Toshiba, or WDC." },
    { "name": "model", "type": "string", "description": "Drive model identifier as published." },
    { "name": "size_tb", "type": "integer", "description": "Nominal capacity in terabytes as published." },
    { "name": "q1_drive_count", "type": "integer", "description": "Drives of this model in the Q1 2026 table. Empty if the model is not in that table." },
    { "name": "q1_drive_days", "type": "integer", "description": "Drive days observed in Q1 2026 (January 1 to March 31, 2026). Empty if not in the table." },
    { "name": "q1_failures", "type": "integer", "description": "Failures in Q1 2026 as published. Empty if not in the table." },
    { "name": "q1_afr_percent", "type": "number", "description": "Q1 2026 AFR in percent, copied as published, not refit. Empty if not in the table." },
    { "name": "q2_drive_count", "type": "integer", "description": "Drives of this model in the Q2 2026 table. Empty if the model is not in that table." },
    { "name": "q2_drive_days", "type": "integer", "description": "Drive days observed in Q2 2026 (April 1 to June 30, 2026). Empty if not in the table." },
    { "name": "q2_failures", "type": "integer", "description": "Failures in Q2 2026 as published. Empty if not in the table." },
    { "name": "q2_afr_percent", "type": "number", "description": "Q2 2026 AFR in percent, copied as published, not refit. Empty if not in the table." }
  ],
  "downloadPath": "/data/datasets/backblaze-q1-q2-2026-afr-shift.csv",
  "chartPath": "/data/datasets/backblaze-q1-q2-2026-afr-shift.svg",
  "citations": [
    {
      "id": "bb-q1-2026-report",
      "title": "Backblaze Drive Stats for Q1 2026",
      "url": "https://www.backblaze.com/blog/backblaze-drive-stats-for-q1-2026/",
      "accessed": "2026-10-09"
    },
    {
      "id": "bb-q2-2026-report",
      "title": "Backblaze Drive Stats for Q2 2026",
      "url": "https://www.backblaze.com/blog/backblaze-drive-stats-for-q2-2026/",
      "accessed": "2026-10-09"
    },
    {
      "id": "bb-drive-stats-data",
      "title": "Hard Drive Reliability & Test Data",
      "url": "https://www.backblaze.com/cloud-storage/resources/hard-drive-test-data",
      "accessed": "2026-10-09"
    }
  ]
}