--- title: My NAS' ZFS pools taught me snapshots matter far more... description: A home-lab NAS user shares why RAID configurations, while useful for uptime, are not a substitute for backups since deletions, malware, and multi-drive... canonical: https://daily.dev/posts/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: My NAS' ZFS pools taught me snapshots matter far more than the RAID level I obsessed over | daily.dev og:description: A home-lab NAS user shares why RAID configurations, while useful for uptime, are not a substitute for backups since deletions, malware, and multi-drive... og:url: https://daily.dev/posts/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl og:image: https://api.daily.dev/og/posts/M95vQikRL.png og:image:alt: My NAS' ZFS pools taught me snapshots matter far more than the RAID level I obsessed over 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. # My NAS' ZFS pools taught me snapshots matter far more than the RAID level I obsessed over **[XDA Developers](https://daily.dev/sources/xda-developers)** · 5 min read · 0 upvotes · 0 comments ## Summary A home-lab NAS user shares why RAID configurations, while useful for uptime, are not a substitute for backups since deletions, malware, and multi-drive failures can wipe RAID-protected data just as easily. ZFS snapshots are presented as the real safeguard, capturing point-in-time, storage-efficient copies of datasets. The setup includes periodic snapshots (twice weekly for active project files, monthly for static data), snapshot replication to an offsite secondary NAS for a 3-2-1 backup pattern, and snapshot lifetime/retention tuning to avoid storage bloat. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Does RAID protect against accidental file deletion or ransomware on a NAS? No, RAID does not protect against accidental deletion, malware, or ransomware because those changes get synced across mirrored or parity drives just like any other write. RAID's purpose is high availability and uptime when a drive fails, not data protection. Even RAID 5 can fail entirely if two drives die during the intensive rebuild process after a single drive failure. _daily.dev surfaces practical NAS and storage lessons for anyone rethinking their backup strategy beyond RAID._ ### How often should I schedule ZFS snapshots on TrueNAS for active project files versus static data? Frequently-modified datasets, such as active project files shared over SMB, benefit from periodic snapshots roughly twice a week, while data that rarely changes can be snapshotted about once a month. Bi-weekly snapshots can be retained for around a month and monthly snapshots kept for about six months to guard against corruption or ransomware while controlling storage usage. _Developers tuning storage retention policies use daily.dev to compare real-world NAS snapshot configurations._ ### What is a 3-2-1 backup setup using ZFS snapshot replication? It involves replicating ZFS snapshots from a primary TrueNAS server to a secondary offsite NAS, so essential files remain recoverable even if the original dataset and its local snapshots become unusable. A low-cost 2-bay NAS or even a mini-PC running rsync can serve as the offsite target, giving an extra recovery layer beyond local snapshots alone. _daily.dev helps self-hosters track offsite replication approaches when designing resilient NAS backups._ ## Similar posts on daily.dev - [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 - [I thought RAID was the important part of my NAS, but TrueNAS taught me snapshots matter more](https://daily.dev/posts/i-thought-raid-was-the-important-part-of-my-nas-but-truenas-taught-me-snapshots-matter-more-2gwg0xjuc) · XDA Developers · 0 upvotes · 0 comments - [What filesystem are you running on your NAS/Backups, and why?](https://daily.dev/posts/what-filesystem-are-you-running-on-your-nas-backups-and-why--lvdfsuxyn) · Lobsters · 0 upvotes · 0 comments - [I had RAID, snapshots, and backups, but one thing almost cost me everything](https://daily.dev/posts/i-had-raid-snapshots-and-backups-but-one-thing-almost-cost-me-everything-gix2gmm4c) · 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/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl) ```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":"My NAS' ZFS pools taught me snapshots matter far more than the RAID level I obsessed over","url":"https://daily.dev/posts/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl"},"datePublished":"2026-08-21T18:30:40.654Z","dateModified":"2026-09-14T06:07:20.608Z","description":"A home-lab NAS user shares why RAID configurations, while useful for uptime, are not a substitute for backups since deletions, malware, and multi-drive...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7d18223d82a928b8d903d18ba76c9fd0?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7d18223d82a928b8d903d18ba76c9fd0?_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/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"linux,truenas","timeRequired":"PT5M"} {"@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":"My NAS' ZFS pools taught me snapshots matter far more than the RAID level I obsessed over"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/my-nas-zfs-pools-taught-me-snapshots-matter-far-more-than-the-raid-level-i-obsessed-over-m95vqikrl#faq","mainEntity":[{"@type":"Question","name":"Does RAID protect against accidental file deletion or ransomware on a NAS?","acceptedAnswer":{"@type":"Answer","text":"No, RAID does not protect against accidental deletion, malware, or ransomware because those changes get synced across mirrored or parity drives just like any other write. 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