{"id":681968,"date":"2021-09-07T19:30:00","date_gmt":"2021-09-07T17:30:00","guid":{"rendered":"https:\/\/www.tomshardware.fr\/?p=681968"},"modified":"2023-06-22T16:58:39","modified_gmt":"2023-06-22T14:58:39","slug":"western-digital-presente-un-disque-dur-mecanique-de-20-to-dote-de-sa-technologie-optinand","status":"publish","type":"post","link":"https:\/\/www.tomshardware.fr\/western-digital-presente-un-disque-dur-mecanique-de-20-to-dote-de-sa-technologie-optinand\/","title":{"rendered":"Western Digital pr\u00e9sente un disque dur m\u00e9canique de 20 To dot\u00e9 de sa technologie OptiNAND"},"content":{"rendered":"\n<p>Il y a quelques jours, Western Digital a annonc\u00e9 le lancement de disques durs de 20 To b\u00e9n\u00e9ficiant de sa technologie OptiNAND. Ils embarquent une m\u00e9moire EFD (<em>embedded flash drive<\/em>) iNAND UFS qui am\u00e9liore \u00e0 la fois leurs performances et leur fiabilit\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2.png\"><img alt=\"Image 1 : Western Digital pr\u00e9sente un disque dur m\u00e9canique de 20 To dot\u00e9 de sa technologie OptiNAND\" decoding=\"async\" width=\"1024\" height=\"467\" src=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-1024x467.png\" alt=\"\" class=\"wp-image-681970\" srcset=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-1024x467.png 1024w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-300x137.png 300w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-150x68.png 150w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-200x91.png 200w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-250x114.png 250w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-350x160.png 350w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-400x183.png 400w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-450x205.png 450w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-500x228.png 500w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-550x251.png 550w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-600x274.png 600w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-640x292.png 640w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-710x324.png 710w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2-755x345.png 755w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital2.png 1030w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital.jpg\"><img alt=\"Image 2 : Western Digital pr\u00e9sente un disque dur m\u00e9canique de 20 To dot\u00e9 de sa technologie OptiNAND\" decoding=\"async\" width=\"740\" height=\"538\" src=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital.jpg\" alt=\"\" class=\"wp-image-681969\" srcset=\"https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital.jpg 740w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-300x218.jpg 300w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-150x109.jpg 150w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-200x145.jpg 200w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-250x182.jpg 250w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-350x254.jpg 350w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-400x291.jpg 400w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-450x327.jpg 450w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-500x364.jpg 500w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-550x400.jpg 550w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-600x436.jpg 600w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-640x465.jpg 640w, https:\/\/www.tomshardware.fr\/content\/uploads\/sites\/3\/2021\/09\/westerndigital-710x516.jpg 710w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>Ces HDD de 20 To h\u00e9ritent de neuf plateaux ePMR (<em>energy-assisted perpendicular magnetic recording technology<\/em>) de 2,2 To chacun, d\u2019un actionneur \u00e0 trois \u00e9tages pour un positionnement plus pr\u00e9cis des t\u00eates de lecture \/ \u00e9criture et de ce fameux EFD. Celui-ci embarque une quantit\u00e9 non pr\u00e9cis\u00e9e de m\u00e9moire flash 3D NAND TLC. Un SoC assure la communication entre l\u2019EFD et les plateaux. Cette m\u00e9moire 3D NAND sert essentiellement au stockage de m\u00e9tadonn\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Une int\u00e9gration transparente pour l&#8217;h\u00f4te<\/h2>\n\n\n\n<p>Plus leur capacit\u00e9 est \u00e9lev\u00e9e, plus les disques durs m\u00e9caniques ont besoin de stocker des gigaoctets de m\u00e9tadonn\u00e9es relatives \u00e0 la RRO (<em>repeatable runout<\/em>) ainsi qu\u2019\u00e0 l\u2019interf\u00e9rence entre pistes adjacentes (ATI pour <em>adjacent track interference<\/em>) ; les disques durs OptiNAND les stockent sur le lecteur flash iNAND plut\u00f4t que sur les supports rotatifs. Cela lib\u00e8re de l\u2019espace sur ces derniers, r\u00e9duit la latence et le nombre d\u2019op\u00e9rations de lecture \/ \u00e9criture. En outre, la technologie iNAND permettrait de conserver environ 100 Mo donn\u00e9es en cas d\u2019arr\u00eat d\u2019urgence.<\/p>\n\n\n\n<p>La pr\u00e9sence de ce lecteur flash est totalement transparente pour l\u2019h\u00f4te. En effet, c&#8217;est le SoC int\u00e9gr\u00e9 au HDD qui se charge de le g\u00e9rer. Toutefois, il est probable que ces composants suppl\u00e9mentaires entrainent une consommation d\u2019\u00e9nergie l\u00e9g\u00e8rement sup\u00e9rieure.<\/p>\n\n\n\n<p>Siva Sivaram, pr\u00e9sident de la branche Global Technology and Strategy de Western Digital d\u00e9clare \u00e0 propos de la technologie OptiNAND : <em>&#8220;Cette architecture sous-tendra notre feuille de route technologique en mati\u00e8re de disque dur pour plusieurs g\u00e9n\u00e9rations, car nous pr\u00e9voyons des disques durs ePMR avec OptiNAND de 50 To dans la seconde moiti\u00e9 de la d\u00e9cennie&#8221;<\/em>.<\/p>\n\n\n\n<p>Western Digital ne pr\u00e9cise pas le surco\u00fbt induit par cette technologie OptiNAND.<\/p>\n\n\n\n<p>Source : <a href=\"https:\/\/www.westerndigital.com\/company\/newsroom\/press-releases\/2021\/2021-08-31-western-digital-reimagines-the-hard-drive\" target=\"_blank\" rel=\"noreferrer noopener\">Western Digital<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un HDD avec une m\u00e9moire flash 3D TLC UFS int\u00e9gr\u00e9e.<\/p>","protected":false},"author":87,"featured_media":681969,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[487,4068],"tags":[557,496],"hubs":[],"acf":{"display_mode":"medium-img","post_show_excerpt":true,"post_source":"","hide_sidebar":false,"hide_advertising":false},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Western Digital pr\u00e9sente un disque dur m\u00e9canique de 20 To dot\u00e9 de sa technologie OptiNAND<\/title>\n<meta name=\"description\" content=\"Un HDD avec une m\u00e9moire flash 3D TLC UFS int\u00e9gr\u00e9e.\" \/>\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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