{"id":112092,"date":"2025-05-13T06:00:00","date_gmt":"2025-05-13T13:00:00","guid":{"rendered":"https:\/\/www.backblaze.com\/blog\/?p=112092"},"modified":"2025-12-11T11:11:22","modified_gmt":"2025-12-11T19:11:22","slug":"backblaze-drive-stats-for-q1-2025","status":"publish","type":"post","link":"https:\/\/www.backblaze.com\/blog\/backblaze-drive-stats-for-q1-2025\/","title":{"rendered":"Backblaze Drive Stats for Q1 2025"},"content":{"rendered":"\r\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"626\" class=\"wp-image-112109\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-1440X880-1-1024x626.png\" alt=\"A decorative image showing the title Backblaze Q1 2025 Drive Stats. \" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-1440X880-1-1024x626.png 1024w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-1440X880-1-300x183.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-1440X880-1-768x469.png 768w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-1440X880-1.png 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 15px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<p>Welcome to the first Drive Stats of 2025. In case you missed it, the <a href=\"https:\/\/www.backblaze.com\/blog\/backblaze-drive-stats-for-2024\/\" target=\"_blank\" rel=\"noreferrer noopener\">2024 Drive Stats report<\/a> was the last for long-time Drive Stats guru, Andy Klein, who is happily retired\u2014off putting the \u201cgreen\u201d in greener pastures by working on his golf game. We\u2013being Backblaze staff writer Stephanie Doyle and Chief Technical Evangelist Pat Patterson\u2013are picking up where Andy left off, bringing you the metrics and analysis you know and love. Now, on to the numbers!\u00a0<\/p>\r\n\r\n\r\n\r\n<p>As of March 31, 2025, we had 312,831 drives under management. Of that total, there were 3,970 boot drives and 308,861 data drives. We\u2019ll review their annualized failure rates (AFRs) as of Q1 2025, and we\u2019ll dig into the average age of drive failure by model, drive size, and more. Along the way, we\u2019ll share our observations and insights on the data presented and, this time around, we\u2019ve got some exciting updates to share about how we produce Drive Stats. (Stay tuned, fellow Snowflake fans.)\u00a0<\/p>\r\n\r\n\r\n\r\n<p>As always, we look forward to your thoughts\u2014we\u2019ll see you in the comments section.\u00a0<\/p>\r\n\r\n\r\n\r\n<div class=\"abstract\" style=\"line-height: 1.8; margin: 24px 12px; padding: 24px 12px 10px 12px;\">\r\n<h4>Sign up for the Drive Stats LinkedIn Live<\/h4>\r\nReady to dive deeper into the data? Tune in Thursday, May 15, 2025 at 10:00 a.m. PT, to query the new Drive Stats team, Stephanie Doyle and Pat Patterson. Feel free to <a href=\"https:\/\/www.surveymonkey.com\/r\/HVBGZQ3\" target=\"_blank\" rel=\"noopener nofollow\">drop us a line with any questions<\/a> you want us to answer. <br \/><br \/><!--HubSpot Call-to-Action Code --><span id=\"hs-cta-wrapper-d47992fb-2b38-4182-b419-51c7af6b45e2\" class=\"hs-cta-wrapper\"><span id=\"hs-cta-d47992fb-2b38-4182-b419-51c7af6b45e2\" class=\"hs-cta-node hs-cta-d47992fb-2b38-4182-b419-51c7af6b45e2\"><!-- [if lte IE 8]><div id=\"hs-cta-ie-element\"><\/div><![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2832298\/d47992fb-2b38-4182-b419-51c7af6b45e2\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" id=\"hs-cta-img-d47992fb-2b38-4182-b419-51c7af6b45e2\" class=\"hs-cta-img\" style=\"border-width: 0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2832298\/d47992fb-2b38-4182-b419-51c7af6b45e2.png\" alt=\"Sign Up for the LinkedIn Live \u2794\" \/><\/a><\/span><script charset=\"utf-8\" src=\"https:\/\/js.hscta.net\/cta\/current.js\"><\/script><script type=\"text\/javascript\"> hbspt.cta.load(2832298, 'd47992fb-2b38-4182-b419-51c7af6b45e2', {\"useNewLoader\":\"true\",\"region\":\"na1\"}); <\/script><\/span><!-- end HubSpot Call-to-Action Code --><\/div>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Drive Stats by the numbers: The digest version<\/h2>\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0eb32a&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0eb32a\" class=\"aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1672\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112121\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1.png\" alt=\"An infographic showing the drive count, drive failures, drive days, and annualized failure rates for the last two quarters. \" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1.png 1920w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1-300x261.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1-1024x892.png 1024w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1-768x669.png 768w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1-1536x1338.png 1536w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Q1-2025-Drive-Stats-_-Infographic-Medium-V2-2-1-1568x1365.png 1568w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n<\/div>\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Q1 2025 hard drive failure rates<\/h2>\r\n\r\n\r\n\r\n<p>As mentioned above, at the end of Q1 2025, we were running 312,831 drives. During the quarter as a whole, however, we were monitoring a total of 318,426 drives; this count includes those that were taken out of service during the quarter, either because they failed or were only used temporarily.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>We\u2019ll discuss the criteria we used in the next section of this report. Removing these drives leaves us with 317,833 hard drives to analyze. The table below shows the annualized failure rates (AFR) for Q1 2025 for this collection of drives.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 5px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-group\" style=\"line-height: 1.1;\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\r\n<div class=\"wp-block-group is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-f32b7c85 wp-block-group-is-layout-flex\" style=\"padding-top: 0px; padding-bottom: 0px;\">\r\n<p class=\"has-text-align-center has-large-font-size\" style=\"padding-top: 0; padding-bottom: 0; line-height: 1;\"><strong>Backblaze Hard Drive Failure Rates for Q1 2025<\/strong><\/p>\r\n\r\n\r\n\r\n<p class=\"has-text-align-center has-extra-small-font-size\" style=\"padding-top: 0; padding-bottom: 0; line-height: 1.2;\">Reporting period January 1, 2025\u2013March 31, 2025 inclusive<br \/>Drive models with drive count &gt; 100 as of March 31, 2025 and drive days &gt; 10,000 in Q1 2025.\u00a0<\/p>\r\n<\/div>\r\n\r\n\r\n\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0eb900&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0eb900\" class=\"wp-block-image size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1037\" height=\"884\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112102\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Quarterly.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Quarterly.png 1037w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Quarterly-300x256.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Quarterly-1024x873.png 1024w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Quarterly-768x655.png 768w\" sizes=\"auto, (max-width: 1037px) 100vw, 1037px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Notes and observations<\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>The 4TB drives are hanging on and finishing strong. <\/strong>Good news: We have another quarter\u2019s worth of data on our beloved 4TB drives (though the planned migration is well underway). True to their history, the 4TB drives showed wonderfully low failure rates, with yet another quarter of zero failures from model HMS5C4040ALE640 and 0.34% AFR from model HMS5C4040BLE640.\u00a0<\/li>\r\n\r\n\r\n\r\n<li><strong>Keeping an eye on the 20TB+ pool. <\/strong>The 24TB Seagate (model ST24000NM002H) no longer has a perfect record, with eight failures for the quarter. Still, the drives put up a respectable 1.11% AFR. Meanwhile, the 20TB+ drives as a pool are averaging a 0.72% AFR, coming in lower than the overall failure rates\u2014always a promising sign.\u00a0<\/li>\r\n\r\n\r\n\r\n<li><strong>Zero failures for the quarter. <\/strong>Four drives get a gold star for zero failures this quarter:\r\n<ul class=\"wp-block-list\">\r\n<li>The 4TB HGST (model HMS5C4040ALE640)\u00a0<\/li>\r\n\r\n\r\n\r\n<li>The Seagate 8TB (model ST8000NM000A)\u00a0<\/li>\r\n\r\n\r\n\r\n<li>Seagate 12TB (model ST12000NM000J)<\/li>\r\n\r\n\r\n\r\n<li>Seagate 14TB (model ST14000NM000J)\u00a0<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Three out of the four also had zero failures last quarter, all but the Seagate 12TB.\u00a0<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>The quarterly failure rate is slightly higher. <\/strong>The quarterly failure rate went up from 1.35% to 1.42%. As with the zero-failure club, our higher-end outlier AFRs show some of the usual suspects:\r\n<ul class=\"wp-block-list\">\r\n<li>Seagate 10TB (model ST10000NM0086). Q4 2024: 5.72%. Q1 2025: 4.72%.<\/li>\r\n\r\n\r\n\r\n<li>HGST 12TB (model HUH721212ALN604). Q4 2024: 5.15%. Q1 2025: 4.97%.<\/li>\r\n\r\n\r\n\r\n<li>Seagate 12TB (model ST12000NM0007). Q4 2024: 8.72%. Q1 2025: 9.47%.<\/li>\r\n\r\n\r\n\r\n<li>Seagate 14TB (model ST14000NM0138). Q4 2024: 5.95%. Q1 2025: 6.82%.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Drive model criteria<\/h2>\r\n\r\n\r\n\r\n<p>We noted earlier we removed 593 drives from consideration when we produced the table above covering Q4 2024. There are two primary reasons we did not consider these drive models.<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>Testing<\/strong>. These are drives of a given model that we monitor and collect Drive Stats data on, but are not considered production drives at this time. For example, drives undergoing certification testing to determine if they are performant enough for our environment are not included in our Drive Stats calculations.<\/li>\r\n\r\n\r\n\r\n<li><strong>Insufficient data points. <\/strong>When we calculate the annualized failure rate for a drive model for a given period of time (quarterly, annual, or lifetime), we want to ensure we have enough data to reliably do so. Therefore we have defined criteria for a drive model to be included in the tables and charts for the specified period of time. Models that do not meet these criteria are not included in the tables and charts for the period in question.<\/li>\r\n<\/ul>\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0ebfc7&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0ebfc7\" class=\"aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"371\" height=\"135\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112107\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-exclusion.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-exclusion.png 371w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-exclusion-300x109.png 300w\" sizes=\"auto, (max-width: 371px) 100vw, 371px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n<\/div>\r\n\r\n\r\n<p>Regardless of whether or not a given drive model is included in the charts and tables, all of the data for all of the drives we use is included in our Drive Stats dataset which you can download by visiting our <a href=\"https:\/\/www.backblaze.com\/cloud-storage\/resources\/hard-drive-test-data\">Drive Stats page<\/a>.<\/p>\r\n\r\n\r\n\r\n<p>As with the Q4 quarterly results, we will apply these criteria to the annual and lifetime charts that follow in this report.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Lifetime hard drive failure rates<\/h2>\r\n\r\n\r\n\r\n<p>As of the end of Q1 2025, we were tracking 312,831 data hard drives. To be considered for the lifetime review, a drive model was required to have 500 or more drives as of the end of Q1 2025 and have over 100,000 accumulated drive days during their lifetime. When we removed those drive models which did not meet the lifetime criteria, we had 312,493 drives grouped into 26 models remaining for analysis as shown in the table below.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 5px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\r\n<div class=\"wp-block-group is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-4b2eccd6 wp-block-group-is-layout-flex\">\r\n<p class=\"has-text-align-center\" style=\"font-size: 24px; line-height: 1.0;\"><strong>Backblaze Lifetime Hard Drive Failure Rates\u00a0<\/strong><\/p>\r\n\r\n\r\n\r\n<p class=\"has-text-align-center\" style=\"font-size: 16px; line-height: 1.1;\">Reporting period ending March 31, 2025 inclusive<br \/>Drive models with &gt; 500 drives and &gt; 100,000 lifetime drive days<\/p>\r\n<\/div>\r\n\r\n\r\n\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0ec42b&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0ec42b\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"770\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112111\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Lifetime-1-1024x770.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Lifetime-1-1024x770.png 1024w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Lifetime-1-300x226.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Lifetime-1-768x578.png 768w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Q12025_Lifetime-1.png 1034w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n<\/div><\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 10px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Notes and observations<\/h3>\r\n\r\n\r\n\r\n<p>The lifetime AFR remains steady, despite some drives having significant change. We see virtually no change in our overall lifetime AFR, which we last tracked at 1.31% in the <a href=\"https:\/\/www.backblaze.com\/blog\/backblaze-drive-stats-for-2024\/\" target=\"_blank\" rel=\"noreferrer noopener\">2024 Year-End Drive Stats Report<\/a>. But, with some drive models showing significant change in year-over-year AFR, it\u2019s worth digging in a little deeper.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>Statistically significant improved AFRs:\u00a0<\/p>\r\n\r\n\r\n\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0ec839&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0ec839\" class=\"wp-block-image size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"987\" height=\"203\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112100\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Worsened-ARR-1.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Worsened-ARR-1.png 987w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Worsened-ARR-1-300x62.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Worsened-ARR-1-768x158.png 768w\" sizes=\"auto, (max-width: 987px) 100vw, 987px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 10px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Both the 12TB and the 14TB had the same number of failures (or nearly so). Meanwhile, the Toshiba 20TB and WDC 22TB had more failures, but added a significant number of drives to the fleet. Both of these activities increase the number of drive days we tracked for the model\u2019s drive pool, so these results are unsurprising.\u00a0<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Statistically significant worsened AFRs:<\/p>\r\n\r\n\r\n\r\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a062be0ecb77&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a062be0ecb77\" class=\"wp-block-image size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"993\" height=\"231\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" class=\"wp-image-112099\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Improved-ARR.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Improved-ARR.png 993w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Improved-ARR-300x70.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats-Q12025_Lifetime_Improved-ARR-768x179.png 768w\" sizes=\"auto, (max-width: 993px) 100vw, 993px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\r\n\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 10px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Meanwhile, we have a few things happening for the significantly worsened AFRs. The WDC drive models are all top performers from a failure perspective, even a change from 0.45% to 0.48% shows up in the numbers.\u00a0<\/li>\r\n\r\n\r\n\r\n<li>That leaves us with two HGST 12TB drives. Both come in above the average failure rate, at 1.45% (model: HUH721212ALE604) and 2.06% (model: HUH721212ALN604). We can give HUH721212ALE604 a pass\u2014with the drive pool showing an average age of 67.1 months, or about five and a half years, it\u2019s firmly on track with the expected pattern defined by <a href=\"https:\/\/www.backblaze.com\/blog\/drive-failure-over-time-the-bathtub-curve-is-leaking\/\" target=\"_blank\" rel=\"noreferrer noopener\">the bathtub curve<\/a>.\u00a0<\/li>\r\n\r\n\r\n\r\n<li>Where does that leave us with model HUH721212ALE604? We\u2019ll keep an eye on it. Given that its AFR rate isn\u2019t too far off from the total AFR of the Backblaze drive fleet, it\u2019s not hugely concerning unless we see the rate of change continue.\u00a0<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">What\u2019s new with Drive Stats?<\/h2>\r\n\r\n\r\n\r\n<p>In taking on this report, our main focus was to ensure continuity with our decades-old dataset. That said, we also saw some opportunities to streamline the process of data collection, a continuation of the work that David Winings talked about in <a href=\"https:\/\/www.backblaze.com\/blog\/overload-to-overhaul-how-we-upgraded-drive-stats-data\/\" target=\"_blank\" rel=\"noreferrer noopener\">Overload to Overhaul: How We Upgraded the Drive Stats Data<\/a> and <a href=\"https:\/\/www.backblaze.com\/blog\/drive-stats-data-deep-dive-the-architecture\/\" target=\"_blank\" rel=\"noreferrer noopener\">Drive Stats Data Deep Dive: The Architecture.<\/a> All of these things set us up for not just an easier time generating this report, but some bigger plans in the future. (We won\u2019t tip our hand yet\u2014but stay tuned.)\u00a0<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Drive Stats gets a Snowflake upgrade<\/h3>\r\n\r\n\r\n\r\n<p>When <a href=\"https:\/\/www.backblaze.com\/blog\/10-stories-from-10-years-of-drive-stats-data\/\" target=\"_blank\" rel=\"noreferrer noopener\">we first started tracking Drive Stats<\/a> way back in 2013, data collection was very ad hoc. For the first few years, when <a href=\"https:\/\/www.backblaze.com\/blog\/author\/brianb\/\" target=\"_blank\" rel=\"noreferrer noopener\">Brian Beach<\/a> was at the helm, we published stats once a year. When <a href=\"https:\/\/www.backblaze.com\/blog\/author\/andy\/\" target=\"_blank\" rel=\"noreferrer noopener\">Andy<\/a> took over in 2015, he moved to publishing quarterly data (starting in 2016). As the dataset grew, and Andy\u2019s collection of lightweight desktop apps started to run out of steam, it became apparent that we needed to upgrade to more capable analytical tooling. For a variety of operational reasons, Andy was gamely running SQL queries against CSV data imported into a MySQL instance running on his laptop\u2014and having to do a ton of manual data cleanup to boot. (Pun obviously intended.)\u00a0<\/p>\r\n\r\n\r\n\r\n<p>This year, with the help of our colleagues on the database engineering team (shoutout to Tom Roden\u2014thanks so much!), we were able to get the Drive Stats data included in the <a href=\"https:\/\/www.backblaze.com\/blog\/data-driven-decisions-wwith-snowflake-and-backblaze-b2\/\" target=\"_blank\" rel=\"noreferrer noopener\">Backblaze Snowflake instance<\/a>. Gone are the days of us bugging folks for exports that take hours to process! We can run lightweight queries against a cached, structured table.<\/p>\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"aligncenter size-medium\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"168\" class=\"wp-image-112104\" src=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Snowflake-300x168.png\" alt=\"\" srcset=\"https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Snowflake-300x168.png 300w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Snowflake-768x431.png 768w, https:\/\/backblazeprod.wpenginepowered.com\/wp-content\/uploads\/2025\/05\/Drive-Stats_Snowflake.png 920w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/figure>\r\n<\/div>\r\n\r\n\r\n<div class=\"wp-block-spacer\" style=\"height: 10px;\" aria-hidden=\"true\">\u00a0<\/div>\r\n\r\n\r\n\r\n<p>We started from Andy\u2019s SQL queries and tweaked them a bit to match the logic and nomenclature of Snowflake fields. Once we had that worked out, the first thing we did was validate our methodology by running the Q4 Drive Stats numbers and comparing them to Andy\u2019s\u2014success.\u00a0<\/p>\r\n\r\n\r\n\r\n<p>It helps that Pat has experimented with our <a href=\"https:\/\/www.backblaze.com\/blog\/querying-a-decade-of-drive-stats-data\/\" target=\"_blank\" rel=\"noreferrer noopener\">Drive Stats dataset in Trino<\/a> and <a href=\"https:\/\/www.backblaze.com\/blog\/iceberg-on-backblaze-b2\/\" target=\"_blank\" rel=\"noreferrer noopener\">other analytical tools like Apache Iceberg<\/a>, so it\u2019s certainly not the first time he\u2019s considered methodology and tooling for this problem. Going forward, we may further refine the process, but for now, the migration to Snowflake saved us a ton of time and manual data cleanup.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">The Hard Drive Stats data<\/h2>\r\n\r\n\r\n\r\n<p>The complete dataset used to create the tables and charts in this report is available on our\u00a0<a href=\"https:\/\/www.backblaze.com\/cloud-storage\/resources\/hard-drive-test-data\/\" target=\"_blank\" rel=\"noreferrer noopener\">Hard Drive Test Data<\/a>\u00a0page. You can download and use this data for free for your own purpose. All we ask are three things: 1) you cite Backblaze as the source if you use the data, 2) you accept that you are solely responsible for how you use the data, and 3) you do not sell this data itself to anyone; it is free.<\/p>\r\n\r\n\r\n\r\n<p>Good luck, and let us know if you find anything interesting.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Read the latest failure rates from the Backblaze drive fleet in the Q1 2025 Drive Stats Report. <\/p>\n","protected":false},"author":217,"featured_media":112109,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[7,434,457],"tags":[468],"class_list":["post-112092","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-storage","category-featured-1","category-hard-drive-stats","tag-b2cloud","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Backblaze Drive Stats for Q1 2025 | Hard Drive Failure Rates<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.backblaze.com\/blog\/backblaze-drive-stats-for-q1-2025\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Backblaze Drive Stats for Q1 2025 | Hard Drive Failure Rates\" \/>\n<meta property=\"og:description\" content=\"Read the latest failure rates from the Backblaze drive fleet in the Q1 2025 Drive Stats Report.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.backblaze.com\/blog\/backblaze-drive-stats-for-q1-2025\/\" \/>\n<meta property=\"og:site_name\" content=\"Backblaze Blog | Cloud Storage &amp; 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