--- title: I found silent data corruption on my NAS months later... description: ZFS maintains data integrity through checksums verified during scheduled scrubs, but silent corruption can accumulate if scrubs aren't running properly. On... canonical: https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: I found silent data corruption on my NAS months later because I ignored one scrub setting | daily.dev og:description: ZFS maintains data integrity through checksums verified during scheduled scrubs, but silent corruption can accumulate if scrubs aren't running properly. On... og:url: https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m og:image: https://api.daily.dev/og/posts/HC1gWec4M.png og:image:alt: I found silent data corruption on my NAS months later because I ignored one scrub setting og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I found silent data corruption on my NAS months later because I ignored one scrub setting **[XDA Developers](https://daily.dev/sources/xda-developers)** · 3 min read · 0 upvotes · 0 comments ## Summary ZFS maintains data integrity through checksums verified during scheduled scrubs, but silent corruption can accumulate if scrubs aren't running properly. On TrueNAS, scrubs are enabled by default but a staggering setting can cause them to not run as expected. Running `zpool scrub` manually or checking scrub history confirms whether scrubs are actually executing. Scrubs are read-only unless repairs are needed, so drive wear is minimal. Monthly or bi-weekly scrubs are recommended, especially for archival data that isn't regularly accessed and therefore never self-verified through normal reads. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [My NAS corrupted years of files because I ignored three critical setup mistakes](https://daily.dev/posts/my-nas-corrupted-years-of-files-because-i-ignored-three-critical-setup-mistakes-yx7b75ced) · XDA Developers · 0 upvotes · 0 comments - [One in four HDDs fail without any warning, and your NAS won't be able to tell you](https://daily.dev/posts/one-in-four-hdds-fail-without-any-warning-and-your-nas-won-t-be-able-to-tell-you-eaf0xklfb) · XDA Developers · 0 upvotes · 0 comments - [Your NAS snapshots are probably disabled, and one mistake will teach you why that matters](https://daily.dev/posts/your-nas-snapshots-are-probably-disabled-and-one-mistake-will-teach-you-why-that-matters-lstwrbckh) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#truenas](https://daily.dev/tags/truenas) [View this post on daily.dev](https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"I found silent data corruption on my NAS months later because I ignored one scrub setting","url":"https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m"},"datePublished":"2026-08-04T14:04:38.535Z","dateModified":"2026-08-04T14:05:01.339Z","description":"ZFS maintains data integrity through checksums verified during scheduled scrubs, but silent corruption can accumulate if scrubs aren't running properly. On...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/213eda8ac252aa99de04cc1adc01362c?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/213eda8ac252aa99de04cc1adc01362c?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"XDA Developers","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"XDA Developers","logo":"https://media.daily.dev/image/upload/s--kCg6yyAP--/f_auto,q_auto/v1774964407/logos/xda-developers?_a=BAMAMiWQ0","url":"https://daily.dev/sources/xda-developers"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/i-found-silent-data-corruption-on-my-nas-months-later-because-i-ignored-one-scrub-setting-hc1gwec4m","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"linux,truenas","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"XDA Developers","item":"https://daily.dev/sources/xda-developers"},{"@type":"ListItem","position":3,"name":"I found silent data corruption on my NAS months later because I ignored one scrub setting"}]} ```