{"id":73492,"date":"2020-03-10T08:41:58","date_gmt":"2020-03-10T05:41:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/podstava-s-nvme-na-linukse"},"modified":"2020-03-10T08:41:58","modified_gmt":"2020-03-10T05:41:58","slug":"podstava-s-nvme-na-linukse","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/administrirovanie\/podstava-s-nvme-na-linukse","title":{"rendered":"Problem mit NVMe unter Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Guten Tag.<\/p>\n

Ich m\u00f6chte die Community auf eine charakteristische Eigenschaft von Linux aufmerksam machen, wenn es um den Umgang mit mehreren NVMe SSDs in einem System geht. Dies ist besonders relevant f\u00fcr diejenigen, die Software-RAID-Arrays aus NVMe erstellen m\u00f6chten.<\/p>\n

Ich hoffe, dass die nachfolgenden Informationen Ihnen helfen, Ihre Daten zu sch\u00fctzen und l\u00e4stige Fehler zu vermeiden.
\n<\/a><\/noindex>
\nWir sind alle an die folgende Logik von Linux gew\u00f6hnt, wenn es um Blockger\u00e4te geht:
\nWenn ein Ger\u00e4t als \/dev\/sda bezeichnet wird, sind die Partitionen darauf \/dev\/sda1, \/dev\/sda2 usw.
\nUm die SMART-Attribute anzuzeigen, verwenden wir etwas wie smartctl -a \/dev\/sda, formatieren und f\u00fcgen dann Partitionen wie \/dev\/sda1 zu den Arrays hinzu.<\/p>\n

Wir sind alle an die Axiomatik gew\u00f6hnt, dass \/dev\/sda1 sich auf \/dev\/sda befindet. Und wenn eines Tages SMART anzeigt, dass \/dev\/sda fast ausgefallen ist, werden wir genau \/dev\/sda1 aus dem RAID-Array entfernen und ersetzen.<\/p>\n

Es stellt sich heraus, dass diese Regel bei der Verwendung von NVMe-Namespaces nicht gilt. Beweis:<\/p>\n

nvme list && ( smartctl -a \/dev\/nvme0 && smartctl -a \/dev\/nvme1 && smartctl -a \/dev\/nvme2 ) | grep Serial\nNode             SN                   Model                                    Namespace Usage                      Format           FW Rev  \n---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------\n\/dev\/nvme0n1     S466NX0K72XX06M      Samsung SSD 970 EVO 500GB                1          96.92  GB \/ 500.11  GB    512   B +  0 B   1B2QEXE7\n\/dev\/nvme1n1     S466NX0K43XX48W      Samsung SSD 970 EVO 500GB                1          91.00  GB \/ 500.11  GB    512   B +  0 B   1B2QEXE7\n\/dev\/nvme2n1     S466NX0K72XX01A      Samsung SSD 970 EVO 500GB                1           0.00   B \/ 500.11  GB    512   B +  0 B   1B2QEXE7\nSerial Number:                      S466NX0K72XX06M\nSerial Number:                      S466NX0K72XX01A\nSerial Number:                      S466NX0K43XX48W\n<\/code><\/pre>\n
\nAufmerksame Leser werden an den Seriennummern feststellen, dass \/dev\/nvme1n1 tats\u00e4chlich auf \/dev\/nvme2 und umgekehrt angeordnet ist.<\/p>\n
P.S.<\/p>\n
Ich w\u00fcnsche Ihnen, dass Sie nie die letzte funktionierende NVMe SSD aus dem RAID-Verbund l\u00f6schen.
\n
Quelle: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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Ich m\u00f6chte die Community auf eine spezielle Eigenschaft von Linux hinweisen, die sich beim Umgang mit mehreren NVMe-SSDs in einem System zeigt. Dies ist besonders relevant f\u00fcr diejenigen, die gerne softwarebasierte RAID-Arrays aus NVMe erstellen. Ich hoffe, dass die nachstehenden Informationen dazu beitragen, Ihre Daten zu sch\u00fctzen und l\u00e4stige Fehler zu vermeiden. Wir sind alle an die folgende Logik von Linux gew\u00f6hnt,","canonical_url":"https:\/\/prohoster.info\/de\/blog\/administrirovanie\/podstava-s-nvme-na-linukse","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041f\u043e\u0434\u0441\u0442\u0430\u0432\u0430 \u0441 NVMe \u043d\u0430 \u041b\u0438\u043d\u0443\u043a\u0441\u0435 | ProHoster","og:description":"\u0414\u043e\u0431\u0440\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0441\u0443\u0442\u043e\u043a. \u0425\u043e\u0442\u0435\u043b 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