{"id":3134,"date":"2025-08-19T15:32:08","date_gmt":"2025-08-19T07:32:08","guid":{"rendered":"https:\/\/oretonstorage.com\/?p=3134"},"modified":"2025-08-19T15:32:08","modified_gmt":"2025-08-19T07:32:08","slug":"comprendre-les-types-de-nand-ssd","status":"publish","type":"post","link":"https:\/\/oretonstorage.com\/fr\/blog\/comprendre-les-types-de-nand-ssd","title":{"rendered":"Comprendre les types de NAND : SLC, MLC, TLC et QLC"},"content":{"rendered":"<p data-start=\"117\" data-end=\"192\"><strong data-start=\"117\" data-end=\"190\">Comment la Flash NAND influe sur les performances, l'endurance et la fiabilit\u00e9 des SSD<\/strong><\/p>\n<p data-start=\"194\" data-end=\"473\">Le c\u0153ur de chaque <a href=\"https:\/\/oretonstorage.com\/fr\/fabricant-de-ssd\/\">Disque dur (SSD)<\/a> est <strong data-start=\"239\" data-end=\"260\">M\u00e9moire flash NAND<\/strong>qui d\u00e9termine la vitesse, l'endurance, la capacit\u00e9 et le co\u00fbt du disque. Dans les applications d'entreprise, de cr\u00e9ation de contenu et \u00e0 forte intensit\u00e9 de donn\u00e9es, il est essentiel de comprendre les types de NAND et leurs caract\u00e9ristiques de performance.<\/p>\n<p data-start=\"475\" data-end=\"659\">Cet article propose une analyse approfondie de <strong data-start=\"521\" data-end=\"552\">SLC, MLC, TLC et QLC NAND<\/strong>Les chercheurs de l'Institut de recherche sur les technologies de l'information et de la communication (IRIS) ont mis au point des strat\u00e9gies d'optimisation de la performance et de l'endurance pour les charges de travail r\u00e9elles.<\/p>\n<hr data-start=\"661\" data-end=\"664\" \/>\n<h2 data-start=\"666\" data-end=\"688\">Principes de base de la NAND Flash<\/h2>\n<p data-start=\"690\" data-end=\"891\">La m\u00e9moire flash NAND est une <strong data-start=\"706\" data-end=\"729\">m\u00e9moire non volatile<\/strong>Cela signifie qu'il conserve les donn\u00e9es sans alimentation \u00e9lectrique. Chaque cellule stocke des charges \u00e9lectriques repr\u00e9sentant des bits. En fonction du nombre de bits par cellule, la NAND est class\u00e9e comme suit :<\/p>\n<ul data-start=\"893\" data-end=\"1088\">\n<li data-start=\"893\" data-end=\"941\">\n<p data-start=\"895\" data-end=\"941\"><strong data-start=\"895\" data-end=\"922\">SLC (Single-Level Cell)<\/strong> - 1 bit par cellule<\/p>\n<\/li>\n<li data-start=\"942\" data-end=\"990\">\n<p data-start=\"944\" data-end=\"990\"><strong data-start=\"944\" data-end=\"970\">MLC (Multi-Level Cell)<\/strong> - 2 bits par cellule<\/p>\n<\/li>\n<li data-start=\"991\" data-end=\"1040\">\n<p data-start=\"993\" data-end=\"1040\"><strong data-start=\"993\" data-end=\"1020\">TLC (cellule \u00e0 triple niveau)<\/strong> - 3 bits par cellule<\/p>\n<\/li>\n<li data-start=\"1041\" data-end=\"1088\">\n<p data-start=\"1043\" data-end=\"1088\"><strong data-start=\"1043\" data-end=\"1068\">QLC (Quad-Level Cell)<\/strong> - 4 bits par cellule<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1090\" data-end=\"1204\">Au fur et \u00e0 mesure que le nombre de bits par cellule augmente, <strong data-start=\"1117\" data-end=\"1145\">la densit\u00e9 de stockage s'am\u00e9liore<\/strong>mais <strong data-start=\"1151\" data-end=\"1201\">la vitesse d'\u00e9criture diminue et l'endurance des cellules baisse<\/strong>.<\/p>\n<p data-start=\"1206\" data-end=\"1372\">Dans la conception des disques SSD, le choix de la technologie NAND est \u00e9troitement li\u00e9 aux \u00e9l\u00e9ments suivants <strong data-start=\"1252\" data-end=\"1325\">les algorithmes des contr\u00f4leurs, les strat\u00e9gies de mise en cache et l'over-provisioning (OP)<\/strong>qui ont tous une incidence sur les performances dans le monde r\u00e9el.<\/p>\n<hr data-start=\"1374\" data-end=\"1377\" \/>\n<h2 data-start=\"1379\" data-end=\"1416\">SLC : Vitesse et endurance maximales<\/h2>\n<p data-start=\"1418\" data-end=\"1529\"><strong data-start=\"1418\" data-end=\"1445\">Cellule \u00e0 niveau unique (SLC)<\/strong> stocke un bit par cellule, offrant ainsi les meilleures performances et la plus longue dur\u00e9e de vie.<\/p>\n<ul data-start=\"1531\" data-end=\"1796\">\n<li data-start=\"1531\" data-end=\"1580\">\n<p data-start=\"1533\" data-end=\"1580\"><strong data-start=\"1533\" data-end=\"1552\">Endurance (TBW)<\/strong>: Jusqu'\u00e0 100 000 cycles P\/E<\/p>\n<\/li>\n<li data-start=\"1581\" data-end=\"1645\">\n<p data-start=\"1583\" data-end=\"1645\"><strong data-start=\"1583\" data-end=\"1609\">Performances des E\/S al\u00e9atoires<\/strong>: Temps de latence extr\u00eamement faible, IOPS \u00e9lev\u00e9<\/p>\n<\/li>\n<li data-start=\"1646\" data-end=\"1714\">\n<p data-start=\"1648\" data-end=\"1714\"><strong data-start=\"1648\" data-end=\"1666\">\u00c9lectricit\u00e9 et chaleur<\/strong>: Minimal, id\u00e9al pour les environnements de serveurs denses<\/p>\n<\/li>\n<li data-start=\"1715\" data-end=\"1796\">\n<p data-start=\"1717\" data-end=\"1796\"><strong data-start=\"1717\" data-end=\"1730\">Cas d'utilisation<\/strong>: Mise en cache d'entreprise, stockage de journaux \u00e0 grande vitesse, bases de donn\u00e9es critiques<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1798\" data-end=\"1916\">Le SLC est rare dans les disques SSD grand public en raison de son co\u00fbt, mais il reste essentiel pour les applications d'entreprise sensibles \u00e0 la latence.<\/p>\n<hr data-start=\"1918\" data-end=\"1921\" \/>\n<h2 data-start=\"1923\" data-end=\"1966\">MLC : performances et capacit\u00e9 \u00e9quilibr\u00e9es<\/h2>\n<p data-start=\"1968\" data-end=\"2075\"><strong data-start=\"1968\" data-end=\"1994\">Cellule multi-niveaux (MLC)<\/strong> stocke 2 bits par cellule, offrant un \u00e9quilibre entre la vitesse, l'endurance et le co\u00fbt.<\/p>\n<ul data-start=\"2077\" data-end=\"2341\">\n<li data-start=\"2077\" data-end=\"2120\">\n<p data-start=\"2079\" data-end=\"2120\"><strong data-start=\"2079\" data-end=\"2092\">Endurance<\/strong>: ~3 000-10 000 cycles P\/E<\/p>\n<\/li>\n<li data-start=\"2121\" data-end=\"2252\">\n<p data-start=\"2123\" data-end=\"2252\"><strong data-start=\"2123\" data-end=\"2156\">Performance s\u00e9quentielle\/al\u00e9atoire<\/strong>: L\u00e9g\u00e8rement plus lent que le SLC mais stable avec <strong data-start=\"2199\" data-end=\"2250\">Algorithmes de mise en cache et d'\u00e9quilibrage de l'\u00e9criture des DRAM\/SSD<\/strong><\/p>\n<\/li>\n<li data-start=\"2253\" data-end=\"2341\">\n<p data-start=\"2255\" data-end=\"2341\"><strong data-start=\"2255\" data-end=\"2268\">Cas d'utilisation<\/strong>: SSD d'entreprise, stations de travail haut de gamme, cr\u00e9ation de contenu professionnel<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2343\" data-end=\"2574\">Les disques MLC modernes mettent souvent en \u0153uvre <strong data-start=\"2377\" data-end=\"2406\">la mise en cache pseudo-SLC (pSLC)<\/strong>En outre, l'utilisation temporaire de la technologie MLC\/TLC NAND comme cache \u00e0 haute vitesse permet d'am\u00e9liorer les performances d'\u00e9criture \u00e0 court terme, ce qui est crucial pour le montage vid\u00e9o, le rendu 3D et d'autres charges de travail \u00e9lev\u00e9es.<\/p>\n<hr data-start=\"2576\" data-end=\"2579\" \/>\n<h2 data-start=\"2581\" data-end=\"2614\">TLC : Le courant dominant de la consommation<\/h2>\n<p data-start=\"2616\" data-end=\"2708\"><strong data-start=\"2616\" data-end=\"2643\">Cellule \u00e0 triple niveau (TLC)<\/strong> est actuellement le type de NAND le plus utilis\u00e9 pour les disques SSD grand public.<\/p>\n<ul data-start=\"2710\" data-end=\"2991\">\n<li data-start=\"2710\" data-end=\"2752\">\n<p data-start=\"2712\" data-end=\"2752\"><strong data-start=\"2712\" data-end=\"2725\">Endurance<\/strong>: ~1 000-3 000 cycles P\/E<\/p>\n<\/li>\n<li data-start=\"2753\" data-end=\"2837\">\n<p data-start=\"2755\" data-end=\"2837\"><strong data-start=\"2755\" data-end=\"2770\">Performance<\/strong>: Bonne vitesse s\u00e9quentielle, l\u00e9g\u00e8rement plus lente pour les petites \u00e9critures al\u00e9atoires<\/p>\n<\/li>\n<li data-start=\"2838\" data-end=\"2926\">\n<p data-start=\"2840\" data-end=\"2926\"><strong data-start=\"2840\" data-end=\"2867\">Strat\u00e9gies d'optimisation<\/strong>: Caching, garbage collection et over-provisioning (OP)<\/p>\n<\/li>\n<li data-start=\"2927\" data-end=\"2991\">\n<p data-start=\"2929\" data-end=\"2991\"><strong data-start=\"2929\" data-end=\"2942\">Cas d'utilisation<\/strong>: PC de jeu, informatique quotidienne, cr\u00e9ation de contenu<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2993\" data-end=\"3164\">La technologie avanc\u00e9e des contr\u00f4leurs permet aux disques SSD TLC d'offrir des performances proches de celles des disques MLC tout en restant abordables, ce qui les rend adapt\u00e9s \u00e0 la plupart des utilisateurs grand public et professionnels.<\/p>\n<hr data-start=\"3166\" data-end=\"3169\" \/>\n<h2 data-start=\"3171\" data-end=\"3217\">QLC : Stockage haute densit\u00e9 et rentable<\/h2>\n<p data-start=\"3219\" data-end=\"3343\"><strong data-start=\"3219\" data-end=\"3244\">Cellule \u00e0 quadruple niveau (QLC)<\/strong> stocke 4 bits par cellule, ce qui maximise la densit\u00e9 de stockage mais r\u00e9duit l'endurance et les performances d'\u00e9criture.<\/p>\n<ul data-start=\"3345\" data-end=\"3754\">\n<li data-start=\"3345\" data-end=\"3385\">\n<p data-start=\"3347\" data-end=\"3385\"><strong data-start=\"3347\" data-end=\"3360\">Endurance<\/strong>: ~100-1 000 cycles P\/E<\/p>\n<\/li>\n<li data-start=\"3386\" data-end=\"3480\">\n<p data-start=\"3388\" data-end=\"3480\"><strong data-start=\"3388\" data-end=\"3419\">Caract\u00e9ristiques de performance<\/strong>: Bonnes vitesses s\u00e9quentielles, \u00e9critures soutenues ou al\u00e9atoires plus lentes<\/p>\n<\/li>\n<li data-start=\"3481\" data-end=\"3671\">\n<p data-start=\"3483\" data-end=\"3513\"><strong data-start=\"3483\" data-end=\"3510\">Strat\u00e9gies d'optimisation<\/strong>:<\/p>\n<ul data-start=\"3516\" data-end=\"3671\">\n<li data-start=\"3516\" data-end=\"3560\">\n<p data-start=\"3518\" data-end=\"3560\">Mise en cache dynamique SLC pour acc\u00e9l\u00e9rer les \u00e9critures<\/p>\n<\/li>\n<li data-start=\"3563\" data-end=\"3618\">\n<p data-start=\"3565\" data-end=\"3618\">Surprovisionnement pour am\u00e9liorer la dur\u00e9e de vie et la stabilit\u00e9<\/p>\n<\/li>\n<li data-start=\"3621\" data-end=\"3671\">\n<p data-start=\"3623\" data-end=\"3671\">Algorithmes de nivellement de l'usure pour \u00e9quilibrer l'utilisation des cellules<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"3672\" data-end=\"3754\">\n<p data-start=\"3674\" data-end=\"3754\"><strong data-start=\"3674\" data-end=\"3687\">Cas d'utilisation<\/strong>: SSD de grande capacit\u00e9, stockage d'archives, charges de travail intensives en lecture<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3756\" data-end=\"3876\">Le QLC est id\u00e9al pour les applications n\u00e9cessitant <strong data-start=\"3796\" data-end=\"3825\">une grande capacit\u00e9 \u00e0 un faible co\u00fbt<\/strong>mais pas pour les charges de travail \u00e0 forte intensit\u00e9 d'\u00e9criture.<\/p>\n<hr data-start=\"3878\" data-end=\"3881\" \/>\n<h2 data-start=\"3883\" data-end=\"3926\">Choisir la technologie NAND la mieux adapt\u00e9e \u00e0 vos besoins<\/h2>\n<div class=\"_tableContainer_sk2ct_1\">\n<div class=\"_tableWrapper_sk2ct_13 group flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3928\" data-end=\"4436\">\n<thead data-start=\"3928\" data-end=\"3999\">\n<tr data-start=\"3928\" data-end=\"3999\">\n<th data-start=\"3928\" data-end=\"3940\" data-col-size=\"sm\">Type de NAND<\/th>\n<th data-start=\"3940\" data-end=\"3952\" data-col-size=\"sm\">Endurance<\/th>\n<th data-start=\"3952\" data-end=\"3966\" data-col-size=\"sm\">Performance<\/th>\n<th data-start=\"3966\" data-end=\"3973\" data-col-size=\"sm\">Co\u00fbt<\/th>\n<th data-start=\"3973\" data-end=\"3999\" data-col-size=\"md\">Cas d'utilisation recommand\u00e9<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"4070\" data-end=\"4436\">\n<tr data-start=\"4070\" data-end=\"4157\">\n<td data-start=\"4070\" data-end=\"4082\" data-col-size=\"sm\">CSL<\/td>\n<td data-col-size=\"sm\" data-start=\"4082\" data-end=\"4094\">Tr\u00e8s \u00e9lev\u00e9<\/td>\n<td data-col-size=\"sm\" data-start=\"4094\" data-end=\"4106\">Tr\u00e8s \u00e9lev\u00e9<\/td>\n<td data-col-size=\"sm\" data-start=\"4106\" data-end=\"4113\">Haut<\/td>\n<td data-col-size=\"md\" data-start=\"4113\" data-end=\"4157\">Mise en cache en entreprise, charges de travail critiques<\/td>\n<\/tr>\n<tr data-start=\"4158\" data-end=\"4252\">\n<td data-start=\"4158\" data-end=\"4170\" data-col-size=\"sm\">MLC<\/td>\n<td data-start=\"4170\" data-end=\"4182\" data-col-size=\"sm\">Haut<\/td>\n<td data-col-size=\"sm\" data-start=\"4182\" data-end=\"4194\">Haut<\/td>\n<td data-col-size=\"sm\" data-start=\"4194\" data-end=\"4208\">Moyenne-\u00e9lev\u00e9e<\/td>\n<td data-col-size=\"md\" data-start=\"4208\" data-end=\"4252\">SSD d'entreprise, postes de travail haut de gamme<\/td>\n<\/tr>\n<tr data-start=\"4253\" data-end=\"4344\">\n<td data-start=\"4253\" data-end=\"4265\" data-col-size=\"sm\">TLC<\/td>\n<td data-col-size=\"sm\" data-start=\"4265\" data-end=\"4277\">Moyen<\/td>\n<td data-col-size=\"sm\" data-start=\"4277\" data-end=\"4291\">Moyenne-\u00e9lev\u00e9e<\/td>\n<td data-col-size=\"sm\" data-start=\"4291\" data-end=\"4300\">Moyen<\/td>\n<td data-col-size=\"md\" data-start=\"4300\" data-end=\"4344\">PC grand public, jeux, cr\u00e9ation de contenu<\/td>\n<\/tr>\n<tr data-start=\"4345\" data-end=\"4436\">\n<td data-start=\"4345\" data-end=\"4357\" data-col-size=\"sm\">QLC<\/td>\n<td data-start=\"4357\" data-end=\"4369\" data-col-size=\"sm\">Faible<\/td>\n<td data-col-size=\"sm\" data-start=\"4369\" data-end=\"4381\">Moyen<\/td>\n<td data-col-size=\"sm\" data-start=\"4381\" data-end=\"4387\">Faible<\/td>\n<td data-col-size=\"md\" data-start=\"4387\" data-end=\"4436\">Archivage de grande capacit\u00e9, stockage en lecture intensive<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"4438\" data-end=\"4545\">Lors du choix d'une carte NAND, il convient de prendre en compte les \u00e9l\u00e9ments suivants <strong data-start=\"4468\" data-end=\"4542\">le type de charge de travail, l'intensit\u00e9 d'\u00e9criture, les exigences en mati\u00e8re de capacit\u00e9 et le budget des co\u00fbts<\/strong>.<\/p>\n<hr data-start=\"4547\" data-end=\"4550\" \/>\n<h2 data-start=\"4552\" data-end=\"4603\"><a href=\"https:\/\/oretonstorage.com\/fr\/fabricant-de-ssd\/\">Oreton SSD<\/a>: Optimis\u00e9 pour les charges de travail r\u00e9elles<\/h2>\n<p data-start=\"4605\" data-end=\"4766\">Oreton combine soigneusement <strong data-start=\"4631\" data-end=\"4715\">Choix du type de NAND, contr\u00f4leurs avanc\u00e9s, m\u00e9canismes de mise en cache et strat\u00e9gies OP<\/strong> pour fournir des disques SSD adapt\u00e9s \u00e0 diverses applications :<\/p>\n<ul data-start=\"4768\" data-end=\"4974\">\n<li data-start=\"4768\" data-end=\"4828\">\n<p data-start=\"4770\" data-end=\"4828\">SSD d'entreprise \u2192 MLC \/ SLC haut de gamme pour l'endurance<\/p>\n<\/li>\n<li data-start=\"4829\" data-end=\"4904\">\n<p data-start=\"4831\" data-end=\"4904\">Charges de travail cr\u00e9atives professionnelles \u2192 TLC haute performance avec cache \u00e9tendu<\/p>\n<\/li>\n<li data-start=\"4905\" data-end=\"4974\">\n<p data-start=\"4907\" data-end=\"4974\">Stockage grand public et de grande capacit\u00e9 \u2192 Solutions TLC\/QLC optimis\u00e9es<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4976\" data-end=\"5135\">Nos disques SSD garantissent <strong data-start=\"4992\" data-end=\"5066\">des performances stables et une dur\u00e9e de vie pr\u00e9visible dans des conditions de travail r\u00e9elles<\/strong>Le syst\u00e8me de gestion de l'information de l'Union europ\u00e9enne (UE) est un syst\u00e8me de gestion de l'information qui offre une valeur maximale aux clients dans les sc\u00e9narios \u00e0 forte intensit\u00e9 de donn\u00e9es.<\/p>\n<p data-start=\"4976\" data-end=\"5135\"><img decoding=\"async\" class=\"aligncenter wp-image-3137\" src=\"https:\/\/oretonstorage.com\/wp-content\/uploads\/2025\/08\/2025-06-17-781x1030.jpg\" alt=\"\" width=\"448\" height=\"591\" \/><\/p>\n<hr data-start=\"5137\" data-end=\"5140\" \/>\n<h2 data-start=\"5142\" data-end=\"5157\">Conclusion<\/h2>\n<p data-start=\"5159\" data-end=\"5219\">Il est essentiel de comprendre les types de NAND lors du choix d'un SSD.<\/p>\n<ul data-start=\"5221\" data-end=\"5356\">\n<li data-start=\"5221\" data-end=\"5272\">\n<p data-start=\"5223\" data-end=\"5272\"><strong data-start=\"5223\" data-end=\"5234\">SLC\/MLC<\/strong> \u2192 Endurance et performances maximales<\/p>\n<\/li>\n<li data-start=\"5273\" data-end=\"5316\">\n<p data-start=\"5275\" data-end=\"5316\"><strong data-start=\"5275\" data-end=\"5282\">TLC<\/strong> \u2192 \u00c9quilibre entre les performances et les co\u00fbts<\/p>\n<\/li>\n<li data-start=\"5317\" data-end=\"5356\">\n<p data-start=\"5319\" data-end=\"5356\"><strong data-start=\"5319\" data-end=\"5326\">QLC<\/strong> \u2192 Capacit\u00e9 \u00e9lev\u00e9e \u00e0 faible co\u00fbt<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5358\" data-end=\"5640\">L'optimisation du contr\u00f4leur, les strat\u00e9gies de mise en cache et l'over-provisioning sont tout aussi importants pour d\u00e9terminer les performances r\u00e9elles. En choisissant la bonne conception NAND et SSD, les entreprises et les utilisateurs professionnels peuvent atteindre l'\u00e9quilibre optimal entre <strong data-start=\"5599\" data-end=\"5637\">co\u00fbt, performance et fiabilit\u00e9<\/strong>.<\/p>","protected":false},"excerpt":{"rendered":"<p>How NAND Flash Influences SSD Performance, Endurance, and Reliability The core of every Solid-State Drive (SSD) is NAND flash memory, which determines the drive\u2019s speed, endurance, capacity, and cost. In enterprise, content creation, and data-intensive applications, understanding NAND types and their performance characteristics is essential. This article provides an in-depth analysis of SLC, MLC, TLC,&#8230;<\/p>","protected":false},"author":3,"featured_media":3138,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Understanding NAND Types: SLC, MLC, TLC, and QLC -<\/title>\n<meta name=\"description\" content=\"Explore SLC, MLC, TLC, and QLC NAND types and learn how they impact SSD performance, endurance, and suitability for different workloads.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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