{"id":91731,"date":"2020-08-17T19:42:18","date_gmt":"2020-08-17T17:42:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/nemnogo-o-smart-i-utilitah-dlya-monitoringa"},"modified":"2020-08-17T19:42:18","modified_gmt":"2020-08-17T17:42:18","slug":"nemnogo-o-smart-i-utilitah-dlya-monitoringa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/nemnogo-o-smart-i-utilitah-dlya-monitoringa","title":{"rendered":"Veidi SMART-ist ja monitooringutest","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Internetis on palju teavet SMART-i ja atribuutide t\u00e4henduse kohta. Kuid ma ei ole kohanud mainimisi mitmetest olulistest aspektidest, millest tean inimestelt, kes tegelevad andmekandjate uurimisega.<\/p>\n

Kui ma j\u00e4lle r\u00e4\u00e4kisin tuttavale, miks SMART-i n\u00e4itudele ei tohiks pimesi usaldada ja miks ei ole m\u00f5istlik kasutada traditsioonilisi \"SMART-i j\u00e4lgimise\" t\u00f6\u00f6riistu pidevalt, tuli mulle m\u00f5te kirja panna \u00f6eldud s\u00f5nad punktide kogumina koos seletustega. Et oleks lihtsam viidatud anda, selle asemel et iga kord uuesti l\u00e4bi r\u00e4\u00e4kida. Ja et tutvustada seda laiemale publikule.
\n<\/a><\/noindex>
\n1) SMART-atribuutide automaatseks j\u00e4lgimiseks m\u00f5eldud programmide kasutamisel tuleks olla \u00e4\u00e4rmiselt ettevaatlik.<\/b><\/p>\n

See, mida te tunnete SMART-atribuutidena, ei ole salvestatud valmis kujul, vaid genereeritakse siis, kui te neid k\u00fcsitakse. Need arvutatakse sisemise statistika p\u00f5hjal, mida salvesti mikroprogrammeerimine kogub ja kasutab t\u00f6\u00f6 k\u00e4igus. <\/p>\n

Osa neist andmetest pole seadmele peamise funktsionaalsuse tagamiseks vajalikud. Need ei ole salvestatud, vaid luuakse iga kord, kui seda vajatakse. Seet\u00f5ttu, kui SMART-atribuutide p\u00e4ring toimub, k\u00e4ivitab mikroprogrammeerimine palju protsesse, mis on vajalikud puuduvate andmete saamiseks. <\/p>\n

Kuid need protsessid ei ole h\u00e4sti koosk\u00f5las toimingutega, mida teostatakse salvesti koormuse ajal lugemis-kirjutamisprotsessidega.<\/p>\n

Ideaalsetes tingimustes ei peaks see tooma kaasa mingeid probleeme. Kuid reaalsuses kirjutavad k\u00f5vakettade p\u00fcsivara tavalised inimesed. Kes v\u00f5ivad eksida ja eksivadki. Seet\u00f5ttu, kui te k\u00fcsite SMART-atribuutide kohta aktiivsete lugemis-kirjutamisoperatsioonide ajal, suureneb oluliselt t\u00f5en\u00e4osus, et midagi l\u00e4heb valesti. N\u00e4iteks v\u00f5ivad kasutaja lugemis- v\u00f5i kirjutamisbuffris andmed rikutuks minna.<\/p>\n

Riskide suurenemise v\u00e4ide ei ole teoreetiline oletus, vaid praktiline t\u00e4helepanek. N\u00e4iteks on teada viga, mis juhtus HDD Samsung 103UI p\u00fcsivaras, kus SMART-atribuutide p\u00e4rimise k\u00e4igus rikutakse kasutajaandmeid.<\/p>\n

Seega, \u00e4rge seadistage SMART atribuutide automaatset kontrollimist. Kui te t\u00e4pselt ei tea, et enne on antud vahem\u00e4lu t\u00fchjendamise k\u00e4sk (Flush Cache). V\u00f5i kui ilma selleta ei saa, seadistage kontrollimise k\u00e4ivitamine v\u00f5imalikult harva. Paljudes j\u00e4lgimisprogrammides on vaikimisi kontrollide vahelise intervall umbes 10 minutit. See on liiga sagedane. Sellised kontrollid ei ole siiski p\u00e4\u00e4steks ootamatust kettah\u00e4irest (p\u00e4\u00e4ste on vaid varundamine). \u00dcks kord p\u00e4evas - arvan, et see on t\u00e4iesti piisav.<\/p>\n

Temperatuuri k\u00fcsimine protsesside k\u00e4ivitamiseks atribuutide arvutamiseks ei p\u00f5hjusta ja v\u00f5ib toimuda sageli. Kuna \u00f5igesti teostatud juhul toimub see SCT protokolli kaudu. SCT kaudu antakse edasi ainult see, mis on juba teada. Need andmed uuendatakse automaatselt taustal.<\/p>\n

2) SMART atribuutide andmed on sageli ebat\u00e4psed.<\/b><\/p>\n

Ketasr\u00fchma mikrokood n\u00e4itab teile seda, mida ta arvad, et on oluline n\u00e4idata, mitte seda, mis tegelikult juhtub. K\u00f5ige silmatorkavam n\u00e4ide on 5. atribuut, \u00fcmbersuunatud sektorite arv. Andmete taastamise spetsialistidele on h\u00e4sti teada, et ketas v\u00f5ib n\u00e4idata viies atribuudis nullrealokatsioonide arvu, kuigi need on olemas ja j\u00e4tkuvad. <\/p>\n

K\u00fcsin spetsialistilt, kes uurib k\u00f5vakettaid ja nende mikrokoodide uurimist. K\u00fcsisin, milline on p\u00f5him\u00f5te, mille alusel seadme tarkvara otsustab, et praegu tuleb peita sektorite \u00fcmbersuunamise fakt, ja n\u00fc\u00fcd v\u00f5ib sellest r\u00e4\u00e4kida SMART atribuutide kaudu.<\/p>\n

Ta vastas, et ei ole \u00fcldreeglit, mille alusel seadmed n\u00e4itavad v\u00f5i peidavad t\u00f5elist pilti. Ja programmeerijate loogika, kes kirjutavad k\u00f5vakettaste tarkvara, n\u00e4ib m\u00f5nikord v\u00e4ga kummaline. Uurides erinevate mudelite tarkvara, on ta n\u00e4inud, et sageli langetatakse otsus \u201epeita v\u00f5i n\u00e4idata\u201d p\u00f5hinedes parameetrite kogumile, mis ei ole \u00fcldse selged, kuidas need omavahel ja k\u00f5vaketta \u00fclej\u00e4\u00e4nud ressursiga seotud on.<\/p>\n

3) SMART andmete t\u00f5lgendamine on tootjaspetsiifiline.<\/b><\/p>\n

N\u00e4iteks ei tasu Seagate'ide juures p\u00f6\u00f6rata t\u00e4helepanu \u00abhalvatele\u00bb tooretele v\u00e4\u00e4rtustele 1 ja 7, kuni \u00fclej\u00e4\u00e4nud on normis. Selle tootja ketastel v\u00f5ivad nende absoluutv\u00e4\u00e4rtused normaalse kasutamise ajal suureneda.<\/p>\n

\"Veidi
\n
\nK\u00f5vaketta seisundi ja j\u00e4relej\u00e4\u00e4nud eluea hindamiseks on esmalt soovitatav p\u00f6\u00f6rata t\u00e4helepanu parameetritele 5, 196, 197, 198. Samuti on m\u00f5ttekas tugineda just absoluutsetele, tooretele v\u00e4\u00e4rtustele (raw), mitte toodetud v\u00e4\u00e4rtustele. Atribuutide teisendamine v\u00f5ib toimuda mitte\u00fcheselt m\u00f5istetavalt ning erinevates algoritmides ja p\u00fcsivara versioonides. <\/p>\n

\u00dcldiselt, infokandjate spetsialistide seas, kui r\u00e4\u00e4gitakse atribuudi v\u00e4\u00e4rtusest, m\u00f5eldakse tavaliselt just absoluutv\u00e4\u00e4rtust.
\n
Allikas: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u0435\u0442\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043c\u043d\u043e\u0433\u043e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e SMART \u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f\u0445 \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u043e\u0432. \u041d\u043e \u043c\u043d\u0435 \u043d\u0435 \u0432\u0441\u0442\u0440\u0435\u0447\u0430\u043b\u0438\u0441\u044c \u0443\u043f\u043e\u043c\u0438\u043d\u0430\u043d\u0438\u044f \u043e \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0432\u0430\u0436\u043d\u044b\u0445 \u043c\u043e\u043c\u0435\u043d\u0442\u0430\u0445, \u043f\u0440\u043e \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0437\u043d\u0430\u044e \u043e\u0442 \u043b\u044e\u0434\u0435\u0439, \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0445\u0441\u044f \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043d\u043e\u0441\u0438\u0442\u0435\u043b\u0435\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041a\u043e\u0433\u0434\u0430 \u044f \u0432 \u043e\u0447\u0435\u0440\u0435\u0434\u043d\u043e\u0439 \u0440\u0430\u0437 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u043b \u0437\u043d\u0430\u043a\u043e\u043c\u043e\u043c\u0443 \u043e \u0442\u043e\u043c, \u043f\u043e\u0447\u0435\u043c\u0443 \u043f\u043e\u043a\u0430\u0437\u0430\u043d\u0438\u044f\u043c SMART \u043d\u0435 \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0431\u0435\u0437\u043e\u0433\u043e\u0432\u043e\u0440\u043e\u0447\u043d\u043e \u0432\u0435\u0440\u0438\u0442\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u043b\u0443\u0447\u0448\u0435 \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u00ab\u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043b\u043a\u0438 \u0421\u041c\u0410\u0420\u0422\u0430\u00bb \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e, \u043f\u0440\u0438\u0448\u043b\u0430 \u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":91732,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-91731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Veidi SMARTist ja j\u00e4lgimist\u00f6\u00f6riistadest | ProHoster","description":"Internetis on rohkelt teavet SMARTi ja atribuutide v\u00e4\u00e4rtuste 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