{"id":16794,"date":"2024-02-25T22:30:00","date_gmt":"2024-02-25T21:30:00","guid":{"rendered":"https:\/\/www.databack.fr\/non-categorise\/raid-servers-the-ultimate-defence-against-data-loss\/"},"modified":"2026-02-26T13:45:02","modified_gmt":"2026-02-26T12:45:02","slug":"raid-servers-the-ultimate-defence-against-data-loss","status":"publish","type":"post","link":"https:\/\/www.databack.fr\/en\/blog\/raid-servers-the-ultimate-defence-against-data-loss\/","title":{"rendered":"RAID servers: the ultimate defence against data loss?"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-6021\" src=\"https:\/\/www.databack.fr\/wp-content\/uploads\/2018\/03\/serveur-raid2.jpeg.png\" alt=\"raid-system\" width=\"600\" height=\"250\" srcset=\"https:\/\/www.databack.fr\/wp-content\/uploads\/2018\/03\/serveur-raid2.jpeg.png 600w, https:\/\/www.databack.fr\/wp-content\/uploads\/2018\/03\/serveur-raid2.jpeg-300x125.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><em>Data storage on RAID servers is proving popular with businesses: fault tolerance, continuous availability or data reconstruction in the event of an incident, business continuity&#8230; Could RAID systems be the ultimate bulwark against data loss?<\/em><\/p>\n<h2>RAID architectures: reliability and performance<\/h2>\n<p><strong>RAID<\/strong> stands for <em>Redundant Array of Independent Disks<\/em>. That&#8217;s how it works: RAID systems are <strong>storage units made up of several hard disks<\/strong> (or <strong>clusters<\/strong>) on which data is distributed.<\/p>\n<p>There are several <strong>RAID levels<\/strong>, combining hard disks and distributing data in different ways according to the desired purpose. The most common levels include :<\/p>\n<ul>\n<li><strong>RAID 0<\/strong> or <em>striping<\/em>: the interleaving of disks<em>(striping<\/em>) and the distribution of data across different volumes are designed to improve read and write speeds. However, the absence of data redundancy means that there is no fault tolerance.<\/li>\n<li><strong>RAID 1<\/strong> or <em>mirroring<\/em>: data is replicated in real time<em>(mirroring<\/em>) on all the hard disks in the array. This type of <strong>redundancy<\/strong> ensures <strong>continuous data availability<\/strong> in the event of an incident.<\/li>\n<li><strong>RAID 5<\/strong> or <em>block-interleaved distributed parity <\/em>: each hard disk contains a part of the data as well as a <strong>parity <\/strong> block: this is redundancy information that enables <strong>lost data to be reconstructed<\/strong> in the event of failure of one of the hard disks.<\/li>\n<li><strong>RAID 10<\/strong> or RAID 1+0: combines RAID 0 interleaving (data distributed across a cluster) and RAID 1 duplication (each cluster replicated on an equivalent cluster). It combines reliability, fault tolerance and read\/write performance.<\/li>\n<\/ul>\n<p><strong>RAID architectures<\/strong> are based on the principle that several storage units are unlikely to fail simultaneously. Their purpose is to improve read and write performance (RAID 0, RAID 5) and\/or <strong>fault tolerance with high data availability<\/strong> (RAID with redundancy).<\/p>\n<p>RAID levels with redundancy are able to function in the event of the loss of one of the hard disks. <strong>The system remains accessible in the event of an incident.<\/strong> Whether data is continuously available or needs to be rebuilt, <strong>business can continue uninterrupted<\/strong>.<\/p>\n<h2>RAID system failures, or why you should anticipate the aftermath.<\/h2>\n<p>Although highly reliable, RAID systems are not infallible. They are vulnerable to the same <a href=\"https:\/\/www.databack.fr\/en\/blog\/data-loss-a-reality-for-all-companies\/\">external causes and types of failure<\/a> as any other hard disk. They can also be subject to other scenarios:<\/p>\n<ul>\n<li><strong>Failure of several hard disks <\/strong>: the hard disks in a system often come from the same series, so the probability of several of them failing at the same time is very real.<\/li>\n<li><strong>RAID controller failure <\/strong>preventing access to drives, resulting in loss of data access.<\/li>\n<li><strong>RAID controller malfunctions<\/strong> leading to RAID configuration alterations or errors.<\/li>\n<li><strong>Errors or corruption during a data reconstruction phase.<\/strong><\/li>\n<\/ul>\n<p>Relying entirely on the reliability and performance of a RAID system is therefore insufficient. Under the provisions of the <strong>RGPD<\/strong> (General Data Protection Regulation) , companies are legally obliged to deploy the necessary means to ensure data security and, in the event of an incident, to <strong>restore its integrity and availability<\/strong>.<\/p>\n<p>Storage on a RAID system with redundancy in itself provides excellent data protection. However, every company needs to anticipate potential incident or disaster scenarios that could lead to data loss. <strong>Risk analysis<\/strong>, <strong>impact analysis<\/strong>, definition of <strong>preventive<\/strong> and <strong>corrective<\/strong> measures will enable them to define the most appropriate <strong>BCP<\/strong> (Business Continuity Plan) and <strong>BRP<\/strong> (Business Resumption Plan).<\/p>\n\n\n<div class=\"wp-block-button aligncenter\"><a class=\"wp-block-button__link has-blanc-color has-orange-background-color has-text-color has-background wp-element-button\" href=\"https:\/\/www.databack.fr\/en\/free-quotation\/\">Get a free quote<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Data storage on RAID servers is proving popular with businesses: fault tolerance, continuous availability or data reconstruction in the event of an incident, business continuity&#8230; Could RAID systems be the ultimate bulwark against data loss? RAID architectures: reliability and performance RAID stands for Redundant Array of Independent Disks. That&#8217;s how it works: RAID systems are [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":17976,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"RAID servers: defence against data loss?","_yoast_wpseo_metadesc":"RAID offers fault tolerance and uptime, making it popular for data storage. But is it truly the ultimate protection against loss in critical situations?","footnotes":""},"categories":[133,69],"tags":[109],"ppma_author":[137,141],"class_list":["post-16794","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-data-recovery-en","tag-1-3-en","author-guillaume-coutand","author-guillaume-coutand-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>RAID servers: defence against data loss?<\/title>\n<meta name=\"description\" content=\"RAID offers fault tolerance and uptime, making it popular for data storage. 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Il rejoint ensuite un cabinet de conseil en cybers\u00e9curit\u00e9, o\u00f9 il d\u00e9veloppe les missions li\u00e9es \u00e0 la gouvernance des syst\u00e8mes d'information et \u00e0 la s\u00e9curit\u00e9 offensive. Il contribue \u00e9galement \u00e0 la structuration du p\u00f4le d\u00e9di\u00e9 \u00e0 la protection des syst\u00e8mes industriels. 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