{"id":47569,"date":"2019-04-24T22:03:49","date_gmt":"2019-04-25T05:03:49","guid":{"rendered":"https:drivesaversdatarecovery.com\/\/?p=47569"},"modified":"2026-02-25T05:51:48","modified_gmt":"2026-02-25T13:51:48","slug":"comment-le-nivellement-de-lusure-peut-il-prolonger-la-duree-de-vie-des-disques-durs","status":"publish","type":"post","link":"https:\/\/drivesaversdatarecovery.com\/fr-fr\/blog\/how-can-wear-leveling-extend-the-life-of-ssd\/","title":{"rendered":"Comment le nivellement par l'usure peut-il prolonger la dur\u00e9e de vie d'un disque SSD ?"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid wpex-relative\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2><span style=\"font-weight: 400;\">Qu'est-ce qu'un SSD ?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Le Solid-State Drive (SSD) est l'une des solutions les plus populaires, les plus rapides et les plus efficaces sur le plan \u00e9nerg\u00e9tique.<\/span><span style=\"font-weight: 400;\">s<\/span><span style=\"font-weight: 400;\"> pour le stockage et le partage d'informations. Le contr\u00f4leur flash et la m\u00e9moire flash NAND sont les deux \u00e9l\u00e9ments qui composent un SSD. L'objectif principal des disques SSD est de fournir des performances \u00e9lev\u00e9es de lecture et d'\u00e9criture pour les demandes de donn\u00e9es al\u00e9atoires et s\u00e9quentielles.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Contrairement au disque dur, le disque SSD ne comporte pas de pi\u00e8ces mobiles. <\/span><span style=\"font-weight: 400;\">Un disque dur ordinaire est constitu\u00e9 de plateaux en rotation sur lesquels les donn\u00e9es sont lues et \u00e9crites par un actionneur qui maintient les t\u00eates magn\u00e9tiques.<\/span><span style=\"font-weight: 400;\">. Le disque dur \u00e9crit et lit les donn\u00e9es magn\u00e9tiquement. H<\/span><span style=\"font-weight: 400;\">Toutefois, les propri\u00e9t\u00e9s magn\u00e9tiques associ\u00e9es \u00e0 la rotation des plateaux peuvent entra\u00eener des d\u00e9faillances m\u00e9caniques.<\/span><span style=\"font-weight: 400;\"> Contrairement au disque dur, le disque dur \u00e0 semi-conducteurs \u00e9crit et lit les donn\u00e9es sur des puces de m\u00e9moire flash en silicium. Les disques SSD sont fabriqu\u00e9s en empilant les puces dans une grille pour obtenir diff\u00e9rentes densit\u00e9s. Gr\u00e2ce aux transistors \u00e0 grille flottante (FGT), <\/span><span style=\"font-weight: 400;\">La m\u00e9moire flash Nand est non volatile et peut donc conserver les donn\u00e9es m\u00eame si la source d'alimentation est \u00e9teinte ou d\u00e9connect\u00e9e.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2><span style=\"font-weight: 400;\">\u00c0 quoi servent les disques SSD ?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Par rapport aux disques fixes, les disques SSD offrent un stockage beaucoup plus rapide ainsi que d'autres avantages en termes de performances. En offrant une latence plus faible que les disques durs, les disques durs \u00e0 semi-conducteurs peuvent effectuer des lectures lourdes et des charges de travail al\u00e9atoires. En raison de leur faible latence, les disques SSD peuvent lire des donn\u00e9es imm\u00e9diatement et directement \u00e0 partir d'un emplacement particulier de la cellule flash SSD.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h3><span style=\"font-weight: 400;\">Fonctions d'un SSD moderne :<\/span><\/h3>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-module vcex-bullets vcex-bullets--vertical vcex-bullets-red\">\n<ul role=\"list\">\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">TRIM<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Lecture, \u00e9criture et cache<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Code correcteur d'erreurs (ECC)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Norme de chiffrement avanc\u00e9e (AES)<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Possibilit\u00e9 de suivi S.M.A.R.T.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Marquer et enregistrer les blocs qui ne fonctionnent pas et les ajouter \u00e0 la liste noire<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Compression des donn\u00e9es <\/span><\/li>\n<li><\/li>\n<\/ul>\n<\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h3><span style=\"font-weight: 400;\">Les avantages des disques SSD par rapport aux disques durs :<\/span><\/h3>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vcex-module vcex-bullets vcex-bullets--vertical vcex-bullets-red\">\n<ul role=\"list\">\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">S'allument instantan\u00e9ment et ne n\u00e9cessitent pas de promotion<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Vitesse d'acc\u00e8s al\u00e9atoire nettement plus \u00e9lev\u00e9e<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Vitesse d'acc\u00e8s nettement plus \u00e9lev\u00e9e<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Le taux de transfert des donn\u00e9es est beaucoup plus \u00e9lev\u00e9<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Aucune d\u00e9fragmentation du syst\u00e8me de fichiers n'est n\u00e9cessaire.<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Silencieux, car ils ne comportent pas de pi\u00e8ces m\u00e9caniques<\/span><\/li>\n<li style=\"font-weight: 400\"><span style=\"font-weight: 400\">Ne pas cr\u00e9er de vibrations<\/span><\/li>\n<\/ul>\n<\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2><span style=\"font-weight: 400;\">Quelle est la dur\u00e9e de vie des disques SSD ?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Pr\u00eatez attention aux diff\u00e9rents types de stockage SSD : Cellule \u00e0 un niveau (SLC), Cellule \u00e0 plusieurs niveaux (MLC) et Cellule \u00e0 trois niveaux (Triple).<\/span> <span style=\"font-weight: 400;\">Level Cell (TLC). La SLC enregistre un bit par cellule de stockage, la MLC deux bits par cellule et la TLC trois bits par cellule. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Plus la quantit\u00e9 de donn\u00e9es sauvegard\u00e9es par cellule est importante, plus le niveau d'usure doit \u00eatre \u00e9lev\u00e9. Les types de stockage peuvent \u00eatre li\u00e9s \u00e0 des cycles d'\u00e9criture. Les <\/span><span style=\"font-weight: 400;\">\u00a0dur\u00e9e de vie de <\/span><span style=\"font-weight: 400;\">La cellule multiniveau (MLC) est <\/span><span style=\"font-weight: 400;\">\u00e0 propos de <\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/Multi-level_cell\"><span style=\"font-weight: 400;\">1 000 \u00e0 10 000 cycles de programmation\/effacement<\/span><\/a><span style=\"font-weight: 400;\">. Par rapport aux disques durs ordinaires, le m\u00e9canisme des disques SSD ne se d\u00e9grade pas lorsqu'il s'agit uniquement de lire des donn\u00e9es. En d'autres termes, le m\u00e9canisme du disque SSD ne s'use pas lorsqu'il ne fait que lire des donn\u00e9es. Il d\u00e9pend donc des processus d'effacement et d'\u00e9criture.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Les <\/span><b>moyenne<\/b> <b>Dur\u00e9e de vie du SSD<\/b><span style=\"font-weight: 400;\"> d\u00e9pend de ses cellules de stockage. Plus il y a de cellules de stockage, plus sa dur\u00e9e de vie est longue. Disposant d'un vaste espace de stockage, les cellules de stockage peuvent servir beaucoup plus longtemps car elles n'ont souvent pas besoin d'\u00eatre r\u00e9\u00e9crites.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gr\u00e2ce au nivellement de l'usure, les disques SSD ont fait un grand pas vers plus d'efficacit\u00e9, de robustesse et de fiabilit\u00e9.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2><span style=\"font-weight: 400;\">Qu'est-ce que le nivellement de l'usure ?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Les disques SSD ne peuvent pas atteindre leur dur\u00e9e de vie optimale sans un nivellement de l'usure pour s'assurer que toutes les puces de m\u00e9moire du disque (qui stockent les donn\u00e9es par blocs) sont utilis\u00e9es avant que la premi\u00e8re cellule ne soit r\u00e9\u00e9crite. Cela signifie \u00e9galement que plus la capacit\u00e9 du disque SSD est importante, plus sa dur\u00e9e de vie est longue.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sans usure<\/span><span style=\"font-weight: 400;\">de l'eau, votre SSD peut tomber en panne. <\/span><span style=\"font-weight: 400;\">bien plus t\u00f4t que vous ne le souhaitez<\/span><span style=\"font-weight: 400;\">. La raison en est que les cellules \u00e0 niveau unique (SLC) et les cellules Flas<\/span><span style=\"font-weight: 400;\">h Les cellules NAND d'un disque dur SSD ont une capacit\u00e9 de charge comprise entre <\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/Flash_memory\"><span style=\"font-weight: 400;\">10 000 ou 100 000 cycles d'effacement, jusqu'\u00e0 1 000 000 de programmes\/effacements <\/span><\/a><span style=\"font-weight: 400;\">cycles. Chacun d'entre eux effectue un certain nombre d'op\u00e9rations d'\u00e9criture et de lecture. Le contr\u00f4leur Flash attribue les adresses logiques du syst\u00e8me d'exploitation aux adresses physiques de la m\u00e9moire Flash. Chaque nouvelle \u00e9criture est lue, effac\u00e9e, modifi\u00e9e et r\u00e9\u00e9crite au premier emplacement. Cela signifie que les espaces de stockage sont fr\u00e9quemment utilis\u00e9s et, par cons\u00e9quent, s'usent plus rapidement. Si quelques blocs sont en fin de vie, votre disque dur SSD peut devenir inutilisable, ce qui entra\u00eenera une perte de donn\u00e9es. Gr\u00e2ce au nivellement de l'usure, les donn\u00e9es sont organis\u00e9es de mani\u00e8re \u00e0 ce que les cycles de programmation et d'effacement soient r\u00e9partis uniform\u00e9ment entre tous les blocs du dispositif.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h2><span style=\"font-weight: 400;\">Nivellement d'usure dynamique ou statique<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Dynamique <\/span><b>Nivellement de l'usure des disques SSD<\/b><span style=\"font-weight: 400;\"> interroge les blocs effac\u00e9s et <\/span><span style=\"font-weight: 400;\">choisit le bloc qui a le<\/span><span style=\"font-weight: 400;\"> le nombre d'effacements le plus faible pour l'\u00e9criture suivante. Le seul inconv\u00e9nient de l'effacement dynamique <\/span><b>Nivellement de l'usure des disques SSD<\/b><span style=\"font-weight: 400;\"> est que si un bloc contient des donn\u00e9es qui ne sont pas consult\u00e9es, elles ne seront jamais supprim\u00e9es au profit d'un autre bloc. Cela limite le nombre de blocs qui peuvent subir un nivellement par l'usure.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le fonctionnement du nivellement statique de l'usure est essentiellement le m\u00eame que celui du nivellement dynamique de l'usure. Toutefois, il garantit que les blocs de donn\u00e9es statiques sont d\u00e9plac\u00e9s lorsque leur nombre de blocs effac\u00e9s est inf\u00e9rieur \u00e0 un certain seuil. Cela peut r\u00e9duire les performances d'\u00e9criture en raison de la surcharge du contr\u00f4leur flash. Toutefois, par rapport au nivellement dynamique de l'usure, le nivellement statique de l'usure est plus efficace car il prolonge plus efficacement la dur\u00e9e de vie des disques SSD.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le SSD est un dispositif de stockage qu'il est n\u00e9cessaire d'optimiser. Le nivellement par l'usure est la meilleure solution pour y parvenir, car il s'agit de l'une des technologies les plus essentielles et les plus efficaces pour prolonger la dur\u00e9e de vie de votre SSD.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"What is an SSD? A Solid-State Drive (SSD) is one of the most popular, fast and energy efficient solutions for storing and sharing information. Flash controller and NAND flash memory are two things that make up an SSD. The primary goal of SSD is to provide high performance of reading and writing for random and&hellip;","protected":false},"author":25,"featured_media":47570,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"inline_featured_image":false,"footnotes":""},"categories":[264],"tags":[284],"post_series":[],"class_list":["post-47569","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ssd","entry","has-media"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How Can Wear Leveling Extend the Life of an SSD?<\/title>\n<meta name=\"description\" content=\"It is impossible to reach optimal SSD lifespan without wear leveling. Moreover, without wear leveling, your SSD can fail. Why? 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Moreover, without wear leveling, your SSD can fail. Why? 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He also oversees the R&amp;D efforts for past, present, and future storage technologies. Mike encourages growth and ensures that each of the departments and their engineers continues to gain knowledge in their field. Each DriveSavers engineer has been trained to ensure the successful and complete recovery of data is their top priority. As Chief Information Security Officer (CISO), Mike oversees cybersecurity at DriveSavers, including maintaining and updating security certifications such as SOC 2 Type II compliance, coordinating company security policy, and employee cybersecurity education. 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