{"id":16233,"date":"2022-12-07T11:01:00","date_gmt":"2022-12-07T10:01:00","guid":{"rendered":"https:\/\/www.databack.fr\/data-recovery-expert\/raid-system\/raid-5\/"},"modified":"2025-08-27T11:39:27","modified_gmt":"2025-08-27T09:39:27","slug":"raid-5","status":"publish","type":"page","link":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/","title":{"rendered":"RAID 5"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\tRAID 5 data recovery<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

RAID 5 operating principle: striping and parity<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The RAID 5 system<\/strong> combines data storage by striping<\/em> (or disk interleaving, like RAID 0<\/a>) and the distribution of parity information. According to the striping<\/em> principle, data is divided between blocks of the same size, distributed by stripe across all the disks in the system. However, in RAID 5, data is not distributed across all disks, as each stripe contains a parity block. <\/p>

During write operations, the value of this parity block is calculated from the other sectors, in this case those containing data, on the stripe. For a RAID 5 consisting of N hard disks, each stripe is therefore made up of a parity block and N-1 data blocks. In addition, these blocks are distributed in a circular fashion, so that the parity blocks are not concentrated on a single disk in the cluster. <\/p>

RAID 5 requires an array of at least three hard disks, preferably with the same storage capacity. Due to parity blocks, the usable capacity of RAID 5 is equal to the size of the smallest disk in the array, multiplied by N-1. While its read performance is comparable to that of RAID 0, its write speed is reduced by parity calculations. RAID 5 is therefore better suited to database processing or small data sets. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\tRAID 5 data recovery<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Data loss and recovery on RAID 5 systems<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Data recovery on a RAID 5 system<\/strong> is facilitated by its redundancy system in the event of the loss of a hard disk in the array. In the event of failure, a logical operation based on parity blocks enables lost data blocks to be regenerated on each stripe. Data availability remains high, as the system is able to operate with a missing disk or during “parity recalculation” and data reconstruction. <\/p>

Despite its fault tolerance, RAID 5 cannot withstand the loss of more than one hard disk at a time. The probability of simultaneous failures can rapidly increase, particularly during the rebuild time, which places intensive demands on the other disks in the cluster. It can also happen that parity blocks or corrupted sectors on functional disks are not detected until another disk has failed completely. Strip reconstruction is then compromised, if not impossible.<\/span><\/p>

When several disks in a RAID 5 system appear to be faulty, an initial analysis can be carried out to determine whether a single corrupted block is at the root of the problem. A partial reconstruction of the data can then be envisaged, before embarking on more extensive recovery procedures. <\/p>

But when the parity algorithm does not allow reconstruction, the complex architecture of RAID 5 (disk order, layout of data and parity blocks, etc.) requires theexpertise and intervention of a laboratory<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tRequest a quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

RAID 5 data recovery RAID 5 operating principle: striping and parity The RAID 5 system combines data storage by striping (or disk interleaving, like RAID 0) and the distribution of parity information. According to the striping principle, data is divided between blocks of the same size, distributed by stripe across all the disks in the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":16219,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page_recuperation_support.php","meta":{"_yoast_wpseo_title":"RAID 5 data recovery - Databack Laboratory","_yoast_wpseo_metadesc":"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.","footnotes":""},"class_list":["post-16233","page","type-page","status-publish","hentry"],"yoast_head":"\nRAID 5 data recovery - Databack Laboratory<\/title>\n<meta name=\"description\" content=\"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.\" \/>\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.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"RAID 5 data recovery - Databack Laboratory\" \/>\n<meta property=\"og:description\" content=\"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/\" \/>\n<meta property=\"og:site_name\" content=\"Databack\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-27T09:39:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.databack.fr\/wp-content\/uploads\/2022\/12\/recup-donnees-raid5.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"RAID 5 data recovery - Databack Laboratory","description":"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/","og_locale":"en_US","og_type":"article","og_title":"RAID 5 data recovery - Databack Laboratory","og_description":"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.","og_url":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/","og_site_name":"Databack","article_modified_time":"2025-08-27T09:39:27+00:00","og_image":[{"url":"https:\/\/www.databack.fr\/wp-content\/uploads\/2022\/12\/recup-donnees-raid5.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/","url":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/","name":"RAID 5 data recovery - Databack Laboratory","isPartOf":{"@id":"https:\/\/www.databack.fr\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/#primaryimage"},"image":{"@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/#primaryimage"},"thumbnailUrl":"https:\/\/www.databack.fr\/wp-content\/uploads\/2022\/12\/recup-donnees-raid5.jpg","datePublished":"2022-12-07T10:01:00+00:00","dateModified":"2025-08-27T09:39:27+00:00","description":"Databack, the data loss specialist, offers you its RAID 5 data recovery procedure.","breadcrumb":{"@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/#primaryimage","url":"https:\/\/www.databack.fr\/wp-content\/uploads\/2022\/12\/recup-donnees-raid5.jpg","contentUrl":"https:\/\/www.databack.fr\/wp-content\/uploads\/2022\/12\/recup-donnees-raid5.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/raid-5\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"R\u00e9cup\u00e9ration de donn\u00e9es","item":"https:\/\/www.databack.fr\/en\/home\/"},{"@type":"ListItem","position":2,"name":"DATA RECOVERY EXPERT","item":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/"},{"@type":"ListItem","position":3,"name":"Raid system","item":"https:\/\/www.databack.fr\/en\/data-recovery-expert\/raid-system\/"},{"@type":"ListItem","position":4,"name":"RAID 5"}]},{"@type":"WebSite","@id":"https:\/\/www.databack.fr\/en\/#website","url":"https:\/\/www.databack.fr\/en\/","name":"Databack","description":"Laboratoire fran\u00e7ais de traitement de donn\u00e9es sensibles et volumineuses","publisher":{"@id":"https:\/\/www.databack.fr\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.databack.fr\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.databack.fr\/en\/#organization","name":"Datenabruf","url":"https:\/\/www.databack.fr\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.databack.fr\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.databack.fr\/wp-content\/uploads\/2025\/06\/favicon.png","contentUrl":"https:\/\/www.databack.fr\/wp-content\/uploads\/2025\/06\/favicon.png","width":512,"height":512,"caption":"Datenabruf"},"image":{"@id":"https:\/\/www.databack.fr\/en\/#\/schema\/logo\/image\/"}}]}},"_links":{"self":[{"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/pages\/16233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/comments?post=16233"}],"version-history":[{"count":0,"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/pages\/16233\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/pages\/16219"}],"wp:attachment":[{"href":"https:\/\/www.databack.fr\/en\/wp-json\/wp\/v2\/media?parent=16233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}