<metaname="description"content="A backup program for disk arrays. It stores parity information of your data and it recovers from up to six disk failures">
<metaname="keywords"content="snapraid snapshot raid backup disk array redundancy parity">
SnapRAID is a powerful backup and redundancy program designed for disk arrays. It stores parity information (a special type of mathematical backup) that allows you to fully recover your data even if you experience up to six simultaneous disk failures.
It is primarily intended for home media centers and large storage arrays containing files that don't change frequently (like movies, music, and photo archives). It offers the high-end protection of a professional server but with the simplicity and flexibility of a home computer.
<pstyle="margin: 0.25rem 0 0 0; font-size: 0.95rem;">The primary goal is total data reconstruction. Should a hard drive fail, SnapRAID uses its parity data to rebuild the entire contents of the lost disk onto a new one. Because it can handle up to six simultaneous failures, it provides a level of resilience that scales with your needs, ensuring that a hardware crash doesn't mean a data catastrophe.</p>
<strongstyle="color: var(--text-primary);">Defense Against the Invisible</strong>
<pstyle="margin: 0.25rem 0 0 0; font-size: 0.95rem;">Physical disk failure isn't the only threat; "bit-rot" or silent errors can corrupt files without warning. SnapRAID proactively defends your archive by hashing every file. It doesn't just wait for a disk to die; it constantly verifies that your data is exactly as you left it, identifying and repairing invisible corruption before it can spread.</p>
<pstyle="margin: 0.25rem 0 0 0; font-size: 0.95rem;">You can start protecting disks that are already full of your movies and photos without moving them.</p>
<pstyle="margin: 0.25rem 0 0 0; font-size: 0.95rem;">Your data is never trapped. If you decide to stop using SnapRAID, your disks remain standard drives that can be read by any computer.</p>
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<h3class="accent-text">INTRODUCING THE DAEMON</h3>
<h2>Real-Time Monitoring & Web API</h2>
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The new SnapRAID Daemon bridges the gap between raw parity and proactive protection.
Move from a manual terminal workflow to an "always-on" background intelligence.
<pclass="card-subtitle">Total data reconstruction</p>
<p>If your hard disks die, SnapRAID can fully recover all the data from the failed drives, up to the number of parity disks you have assigned (protecting you from up to 6 simultaneous failures).</p>
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<h3>Silent Corruption Protection</h3>
<pclass="card-subtitle">Total data integrity</p>
<p>All your data is hashed to ensure integrity and prevent "bit-rot." If a file suffers from silent corruption, SnapRAID detects it and repairs it using your parity information.</p>
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<h3>Surgical Recovery</h3>
<pclass="card-subtitle">Undelete and restore</p>
<p>If you accidentally delete files on a disk, recovery is possible. SnapRAID can reconstruct missing data and even undelete specific folders without affecting the rest of the array.</p>
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<h3>Fault Isolation</h3>
<pclass="card-subtitle">Confined data loss</p>
<p>When the number of failed disks exceeds the parity count, data loss is confined only to the affected disks. Data on all other healthy disks remains fully accessible and untouched.</p>
<p>Disks can have different sizes and different brands. You can add new disks to the array at any time as your storage needs grow, without the need for complex migrations.</p>
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<h3>Eco-Friendly Efficiency</h3>
<pclass="card-subtitle">Power-saving by design</p>
<p>To access a file, only a single disk needs to spin. This reduces noise, saves power, and extends the lifespan of your hardware compared to traditional RAID systems that spin every disk for every read.</p>
<pclass="card-subtitle">Access your data, your way</p>
<p>You can utilize disks already filled with files without the need to reformat them. Access your files as usual, even without the program running. SnapRAID doesn't lock in your data; you can stop using it anytime without moving a single byte.</p>
<pclass="card-subtitle">Transparent, Community-Driven, and Cost-Free</p>
<p>SnapRAID is released under the GPLv3 license, ensuring the code remains open for inspection and improvement. There are no licensing fees, no subscriptions, and no hidden "Pro" tiers. You have full ownership of your data protection engine.</p>
