{"id":55473,"date":"2020-01-21T00:00:00","date_gmt":"2020-01-20T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/samsung-predlozhil-novyj-variant-drajvera-exfat-dlya-yadra-linux"},"modified":"2020-02-18T14:03:35","modified_gmt":"2020-02-18T11:03:35","slug":"samsung-predlozhil-novyj-variant-drajvera-exfat-dlya-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/samsung-predlozhil-novyj-variant-drajvera-exfat-dlya-yadra-linux","title":{"rendered":"A Samsung lan\u00e7ou uma nova vers\u00e3o do driver exFAT para o n\u00facleo Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Empresa Samsung <noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2020\/1\/18\/114\">ofereceu<\/a><\/noindex>  para incluir no n\u00facleo Linux um conjunto de patches com a implementa\u00e7\u00e3o de um novo driver exFAT, baseado na atual base de c\u00f3digo &#171;sdfat&#187;, desenvolvido para firmwares de smartphones Samsung. Se os patches forem aceitos, eles far\u00e3o parte do n\u00facleo Linux 5.6, cuja libera\u00e7\u00e3o est\u00e1 prevista para 2-3 meses. Em compara\u00e7\u00e3o com o driver exFAT previamente adicionado ao n\u00facleo, o novo driver proporciona um aumento de desempenho de cerca de 10%.<\/p>\n<p>As principais diferen\u00e7as da edi\u00e7\u00e3o do driver sdfat para o n\u00facleo principal do Linux em rela\u00e7\u00e3o ao driver utilizado pela Samsung no Android:<\/p>\n<ul>\n<li class=\"l\"> O c\u00f3digo da implementa\u00e7\u00e3o do sistema de arquivos VFAT foi removido, pois esse sistema de arquivos j\u00e1 \u00e9 suportado separadamente no n\u00facleo (fs\/fat);\n<li class=\"l\"> O driver foi renomeado de sdfat para exfat;\n<li class=\"l\"> O c\u00f3digo foi refatorado. Os textos-fonte foram adequados aos requisitos de formata\u00e7\u00e3o do c\u00f3digo para o n\u00facleo do Linux;\n<li class=\"l\"> Realizada a otimiza\u00e7\u00e3o de opera\u00e7\u00f5es com metadados, como cria\u00e7\u00e3o de arquivos, busca de elementos do sistema de arquivos (lookup) e determina\u00e7\u00e3o do conte\u00fado do diret\u00f3rio (readdir).\n<li class=\"l\"> Corrigidos os erros identificados durante testes adicionais.\n<\/ul>\n<p>Lembramos que ap\u00f3s a Microsoft <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51374\">publicou<\/a><\/noindex> especifica\u00e7\u00f5es p\u00fablicas e ofereceu a possibilidade de uso gratuito das patentes de exFAT no Linux, na se\u00e7\u00e3o experimental &#171;staging&#187; (&#171;drivers\/staging\/&#187;) do n\u00facleo 5.4 foi adicionado o driver exFAT, tamb\u00e9m desenvolvido na Samsung, mas baseado em  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dorimanx\/exfat-nofuse\">c\u00f3digo desatualizado<\/a><\/noindex> (vers\u00e3o 1.2.9). Entusiastas de firmware Android criaram <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51490\">portado<\/a><\/noindex> um novo driver sdFAT (2.x), mas a empresa Samsung decidiu por conta pr\u00f3pria promover esse driver para o n\u00facleo principal do Linux. Al\u00e9m disso, a Paragon Software lan\u00e7ou <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51724\">um driver alternativo<\/a><\/noindex>, anteriormente fornecido em um pacote propriet\u00e1rio de drivers.<\/p>\n<p>O sistema de arquivos exFAT foi criado pela Microsoft para eliminar as limita\u00e7\u00f5es do FAT32 ao ser usado em dispositivos de armazenamento flash de grande capacidade. O suporte para o sistema de arquivos exFAT apareceu no Windows Vista Service Pack 1 e no Windows XP com Service Pack 2. O tamanho m\u00e1ximo do arquivo, em compara\u00e7\u00e3o com o FAT32, foi expandido de 4 GB para 16 exabytes, a limita\u00e7\u00e3o do tamanho m\u00e1ximo da parti\u00e7\u00e3o foi removida para 32 GB, uma bitmap de blocos livres foi introduzida para reduzir a fragmenta\u00e7\u00e3o e aumentar a velocidade, a limita\u00e7\u00e3o no n\u00famero de arquivos em um diret\u00f3rio foi elevada para 65 mil, e a possibilidade de armazenar ACL foi prevista. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52222\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Samsung \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b\u0430 \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u044f\u0434\u0440\u043e Linux \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043d\u043e\u0432\u043e\u0433\u043e \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 exFAT, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u0435 &#171;sdfat&#187;, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a Android-\u0441\u043c\u0430\u0440\u0442\u0444\u043e\u043d\u043e\u0432 Samsung. \u0415\u0441\u043b\u0438 \u043f\u0430\u0442\u0447\u0438 \u0431\u0443\u0434\u0443\u0442 \u043f\u0440\u0438\u043d\u044f\u0442\u044b, \u0442\u043e \u043e\u043d\u0438 \u0432\u043e\u0439\u0434\u0443\u0442 \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 5.6, \u0440\u0435\u043b\u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u043e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f \u0447\u0435\u0440\u0435\u0437 2-3 \u043c\u0435\u0441\u044f\u0446\u0430. \u041f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0440\u0430\u043d\u0435\u0435 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u043c \u0432 \u044f\u0434\u0440\u043e \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u043e\u043c exFAT, \u043d\u043e\u0432\u044b\u0439 \u0434\u0440\u0430\u0439\u0432\u0435\u0440 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-55473","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta 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