Les \u00e9tudes sur la temp\u00e9rature des disques durs men\u00e9es par Google et Backblaze concluent en effet que \u00ab tant que vous utilisez les disques dans leur plage de temp\u00e9ratures de fonctionnement autoris\u00e9e, il n'est pas n\u00e9cessaire de les refroidir \u00bb et avancent que \u00ab l'absence d'un mod\u00e8le coh\u00e9rent de taux de d\u00e9faillance plus \u00e9lev\u00e9 pour les disques \u00e0 temp\u00e9rature plus \u00e9lev\u00e9e... \u00bb. Les conclusions de ces \u00e9tudes semblent tr\u00e8s pertinentes, mais l'histoire s'arr\u00eate-t-elle l\u00e0 ?<\/p>\n\n\n\n
Nous insistons sur le fait que la temp\u00e9rature des disques durs est beaucoup plus importante que ne le pensent Google et Backblaze.<\/p>\n\n\n\n
Quels sont donc les probl\u00e8mes li\u00e9s \u00e0 l'\u00e9chauffement des disques durs ? Comme vous le savez peut-\u00eatre, les disques durs stockent des donn\u00e9es sur la surface ferromagn\u00e9tique de leurs plateaux. Chaque bit de donn\u00e9es est physiquement repr\u00e9sent\u00e9 par un petit domaine de magn\u00e9tisation. La direction de l'aimantation correspond soit \u00e0 0, soit \u00e0 1.<\/p>\n\n\n\n
Le probl\u00e8me de la temp\u00e9rature vient du fait que le mat\u00e9riau magn\u00e9tique des plateaux des disques durs, s'il est chauff\u00e9, commence \u00e0 perdre sa capacit\u00e9 intrins\u00e8que \u00e0 pr\u00e9server la direction de l'aimantation lorsqu'il n'est soumis \u00e0 aucune force magn\u00e9tique externe. Autrement dit, les z\u00e9ros peuvent se transformer spontan\u00e9ment en uns et vice versa. Pire encore, si la temp\u00e9rature continue d'augmenter, le mat\u00e9riau perd compl\u00e8tement ses capacit\u00e9s magn\u00e9tiques, ce qui signifie que cette partie du disque dur est irr\u00e9versiblement endommag\u00e9e et ne peut plus \u00eatre \u00e9crite ni lue.<\/p>\n\n\n\n
Quelles sont ces temp\u00e9ratures ? Tous les disques durs modernes utilisent un film magn\u00e9tique compos\u00e9 d'alliages \u00e0 base de cobalt. Ces alliages sont normalement assez r\u00e9sistants \u00e0 la chaleur. Il faudrait plonger un morceau de cet alliage dans un four pour que les domaines magn\u00e9tiques orient\u00e9s qu'il contient deviennent chaotiques. Ce n'est pas le cas des films ultraminces de cobalt utilis\u00e9s dans les disques durs. Le point de Curie (la temp\u00e9rature \u00e0 laquelle les mat\u00e9riaux perdent leurs propri\u00e9t\u00e9s magn\u00e9tiques) de ces fines couches d'alliage de cobalt est beaucoup plus bas. De plus, les couches minces sont globalement plus sensibles \u00e0 la temp\u00e9rature. En d'autres termes, les disques durs sont sujets \u00e0 des d\u00e9faillances dues \u00e0 la temp\u00e9rature en raison de la physique sous-jacente \u00e0 leur fonctionnement.<\/p>\n\n\n\n
Les \u00e9tudes de Google et de Backblaze ont toutes deux port\u00e9 sur un nombre impressionnant de disques durs. D'un point de vue statistique, leurs r\u00e9sultats sont significatifs et fiables. \u00c0 une exception pr\u00e8s : les \u00e9chantillons ne comprenaient que des disques durs fonctionnant dans des centres de donn\u00e9es, c'est-\u00e0-dire des pi\u00e8ces bien climatis\u00e9es avec un contr\u00f4le automatique strict de la temp\u00e9rature et de l'humidit\u00e9. Or, les environnements dont b\u00e9n\u00e9ficient les utilisateurs pour leurs disques sont souvent moins raffin\u00e9s.<\/p>\n\n\n\n
En effet, la temp\u00e9rature typique d'un disque dur de PC domestique est d'environ 50 \u00b0C, pouvant atteindre 60 \u00b0C, voire plus, en \u00e9t\u00e9, alors que la moyenne des \u00e9tudes est de 25 \u00e0 30 \u00b0C. Cette situation est due \u00e0 une mauvaise circulation de l'air autour du disque dur. En effet, contrairement \u00e0 ceux des centres de donn\u00e9es, les disques durs des ordinateurs personnels sont install\u00e9s dans un bo\u00eetier ferm\u00e9, souvent \u00e0 proximit\u00e9 d'autres dispositifs d\u00e9gageant de la chaleur, tels que d'autres disques, l'unit\u00e9 centrale et la carte vid\u00e9o.<\/p>\n\n\n\n
Tout cela fait que les situations que Google et Backblaze d\u00e9crivent comme extr\u00eames sont tout \u00e0 fait courantes pour un ordinateur de salon typique. Dans le m\u00eame temps, les basses temp\u00e9ratures (inf\u00e9rieures \u00e0 25 \u00b0C), consid\u00e9r\u00e9es comme dangereuses, sont tr\u00e8s peu susceptibles de se produire.<\/p>\n\n\n\n
En conclusion, cet article signifie-t-il que Google et Backblaze ont tort et que leurs \u00e9tudes sur la temp\u00e9rature des disques durs sont incoh\u00e9rentes ? Pas du tout ! Elles ne s'appliquent tout simplement pas aux disques durs \u00e0 usage domestique.<\/p>\n\n\n\n
Tant que vous ne vivez pas dans le centre de donn\u00e9es de Google, la temp\u00e9rature de vos disques durs reste un sujet de pr\u00e9occupation. Aujourd'hui, il est facile de la contr\u00f4ler, car SMART fournit toutes les informations dont vous avez besoin. Il existe de nombreux outils, depuis les utilitaires int\u00e9gr\u00e9s \u00e0 la carte m\u00e8re jusqu'aux utilitaires d'information syst\u00e8me tels que HWiNFO ou HWMonitor. Vous pouvez bien s\u00fbr essayer notre HDDlife.<\/p>\n\n\n\n
* La temp\u00e9rature typique d'un disque dur de PC domestique est d'environ 50 \u00b0C et peut atteindre 60 \u00b0C, voire plus, en \u00e9t\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"
Studies about HDD temperature conducted by Google and Backblaze in the same breath conclude that \u201cAs long as you run drives well within their allowed range of operating temperatures, keeping them cooler doesn\u2019t matter\u201d and argue \u201c\u2026the lack of a consistent pattern of higher failure rates for higher temperature drives…\u201d. The bottom lines of the […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[24],"tags":[],"class_list":["post-1258","post","type-post","status-publish","format-standard","hentry","category-hdd-temperature"],"spectra_custom_meta":{"_edit_lock":["1738147731:1"],"_uag_custom_page_level_css":[""],"ast-site-content-layout":["default"],"theme-transparent-header-meta":[""],"adv-header-id-meta":[""],"stick-header-meta":[""],"astra-migrate-meta-layouts":["set"],"footnotes":[""],"_edit_last":["1"],"stackable_optimized_css":[""],"stackable_optimized_css_raw":["a:0:{}"],"_wp_old_date":["2024-06-27"],"rank_math_news_sitemap_robots":["index"],"rank_math_robots":["a:1:{i:0;s:5:\"index\";}"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["60"],"rank_math_focus_keyword":["hdd temperature, hard dsik temperature, google hdd temperature"],"_wp_old_slug":["test-article"],"rank_math_description":["Did you know HDD temperature impacts performance and lifespan? 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