{"id":34535,"date":"2019-10-31T21:58:54","date_gmt":"2019-10-31T18:58:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/problema-s-poterej-dannyh-na-ssd-pri-ispolzovanii-yadra-linux-5-1-lvm-i-dm-crypt\/"},"modified":"2019-10-31T21:58:54","modified_gmt":"2019-10-31T18:58:54","slug":"problema-s-poterej-dannyh-na-ssd-pri-ispolzovanii-yadra-linux-5-1-lvm-i-dm-crypt","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/problema-s-poterej-dannyh-na-ssd-pri-ispolzovanii-yadra-linux-5-1-lvm-i-dm-crypt","title":{"rendered":"Probleme mit Datenverlust auf SSDs bei Verwendung des Linux-Kernels 5.1, LVM und dm-crypt.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Im korrigierenden Linux-Kernel-Release Linux 5.1.5<\/a><\/noindex> 21. November<\/a><\/noindex> Das Problem in der DM (Device Mapper) Subsystem, das kann dazu f\u00fchren<\/a><\/noindex> zu Datenverlust auf SSD-Speicher f\u00fchrt. Das Problem tritt auf nachdem \u00c4nderungen<\/a><\/noindex>, das im Januar dieses Jahres in den Kernel aufgenommen wurde, betrifft nur den Branch 5.1 und tritt in der \u00fcberwiegenden Mehrheit der F\u00e4lle auf Systemen mit Samsung SSDs auf, auf denen Datenverschl\u00fcsselung mit dm-crypt\/LUKS \u00fcber device-mapper\/LVM angewendet wird. <\/p>\n

Die Ursache des Problems ist<\/a><\/noindex> ist eine zu aggressive Markierung freigegebener Bl\u00f6cke \u00fcber FSTRIM (es wurden zu viele Sektoren auf einmal markiert, ohne die Grenze max_io_len_target_boundary zu beachten). In den Distributionen, die den Kernel 5.1 anbieten, wurde der Fehler bereits behoben in Fedora<\/a><\/noindex>, aber bleibt bisher ungel\u00f6st in ArchLinux<\/a><\/noindex> (Die Korrektur ist verf\u00fcgbar, befindet sich aber derzeit im \u201eTesting\u201c-Branch). Als Workaround f\u00fcr das Blockieren des Problems wird empfohlen, den Dienst fstrim.service\/timer zu deaktivieren, die ausf\u00fchrbare Datei fstrim vor\u00fcbergehend umzubenennen, die Option \u201ediscard\u201c aus den Mount-Optionen in fstab zu entfernen und den Modus \u201eallow-discards\u201c in LUKS \u00fcber dmsetup zu deaktivieren.<\/p>\n

<\/a><\/noindex><\/p>\n

Quelle: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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