Kusagwirizana pakati pa ma drive a WD SMR ndi ZFS kwadziwika, zomwe zingayambitse kutayika kwa data

iXsystems, wopanga polojekiti ya FreeNAS, anachenjezedwa za zovuta zazikulu ndi kuyanjana kwa ZFS ndi ma hard drive atsopano a WD Red otulutsidwa ndi Western Digital pogwiritsa ntchito ukadaulo wa SMR (Shingled Magnetic Recording). Muzochitika zoyipa kwambiri, kugwiritsa ntchito ZFS pama drive ovuta kungayambitse kutayika kwa data.

Mavuto amadza ndi ma drive a WD Red okhala ndi mphamvu kuyambira 2 mpaka 6 TB, opangidwa kuyambira 2018, omwe amagwiritsa ntchito ukadaulo pojambulira. DM-SMR (Chipangizo Choyendetsedwa ndi Shingled Magnetic Recording) ndi zalembedwa EFAX label (kwa CMR disks chizindikiritso cha EFRX chimagwiritsidwa ntchito). Western Digital adalemba mu blog yake kuti ma drive a WD Red SMR adapangidwa kuti azigwiritsidwa ntchito ku NAS kwa mabizinesi akunyumba ndi ang'onoang'ono, omwe amayika ma drive osapitilira 8 ndipo amakhala ndi katundu wa 180 TB pachaka, momwe amasungidwira ndikugawana mafayilo. Mbadwo wam'mbuyo wa WD Red drives ndi WD Red zitsanzo zokhala ndi mphamvu ya 8 TB kapena kupitilira apo, komanso zoyendetsa kuchokera ku mizere ya WD Red Pro, WD Gold ndi WD Ultrastar, zikupitilizabe kupangidwa kutengera ukadaulo wa CMR (Conventional Magnetic Recording) ndipo kugwiritsa ntchito kwawo sikumayambitsa mavuto ndi ZFS.

Chofunika kwambiri cha teknoloji ya SMR ndi kugwiritsa ntchito mutu wa maginito pa diski, m'lifupi mwake ndi waukulu kuposa m'lifupi mwa njanji, zomwe zimatsogolera kujambula ndi kuphatikizika pang'ono kwa njira yoyandikana nayo, i.e. kujambulanso kulikonse kumabweretsa kufunikira kolembanso gulu lonse la mayendedwe. Kukhathamiritsa ntchito ndi ma drive oterowo, amagwiritsidwa ntchito kugawa malo - malo osungiramo amagawidwa m'madera omwe amapanga magulu a midadada kapena magawo, momwe kuwonjezereka kotsatizana kokha kumaloledwa ndi kukonzanso gulu lonse la midadada. Nthawi zambiri, zoyendetsa za SMR ndizopatsa mphamvu zambiri, zotsika mtengo, komanso zimawonetsa zopindulitsa pazolemba zotsatizana, koma kuchedwa polemba mwachisawawa, kuphatikiza ntchito monga kukonzanso zosungirako.

DM-SMR imatanthawuza kuti kugawa ndi kugawa deta kumayendetsedwa ndi wolamulira wa disk ndipo padongosolo disk yotereyi imawoneka ngati disk hard disk yomwe siifuna kusintha mosiyana. DM-SMR imagwiritsa ntchito ma adilesi osalunjika (LBA, Logical Block Addressing), monga kukumbukira maadiresi omveka pama drive a SSD. Ntchito iliyonse yolemba mwachisawawa imafuna ntchito yotolera zinyalala zakumbuyo, zomwe zimapangitsa kuti pakhale kusinthasintha kosayembekezereka. Dongosolo litha kuyesa kugwiritsa ntchito kukhathamiritsa kwa ma disks oterowo, pokhulupirira kuti zomwe zalembedwazo zidzalembedwera gawo lomwe latchulidwa, koma kwenikweni chidziwitso choperekedwa ndi woyang'anira chimangotsimikizira kapangidwe kake, ndipo, pogawa deta, wowongolera adzagwiritsa ntchito yake. ma algorithms omwe amaganizira zomwe zidaperekedwa kale. Chifukwa chake, musanagwiritse ntchito ma disks a DM-SMR mu dziwe la ZFS, tikulimbikitsidwa kuchita opareshoni kuti zirole ndikuzibwezeretsanso ku chikhalidwe chawo choyambirira.

Western Digital yakhala ikuchitapo kanthu pakuwunika momwe mavuto amayambira, omwe, pamodzi ndi iXsystems, akuyesera kupeza yankho ndikukonzekera kusintha kwa firmware. Musanasindikize zonena za kukonza mavutowa, ma drive omwe ali ndi firmware yatsopano akukonzekera kuti ayesedwe pazosungira zodzaza ndi FreeNAS 11.3 ndi TrueNAS CORE 12.0. Zimanenedwa kuti chifukwa cha kutanthauzira kosiyanasiyana kwa SMR ndi opanga osiyanasiyana, mitundu ina ya ma drive a SMR ilibe vuto ndi ZFS, koma kuyesa kochitidwa ndi iXsystems kumangoyang'ana ma drive a WD Red potengera ukadaulo wa DM-SMR, ndi SMR. amayendetsa opanga ena kafukufuku wowonjezera akufunika.

Pakadali pano, mavuto omwe ali ndi ZFS atsimikiziridwa ndikubwerezedwanso pamayeso a WD Red 4TB WD40EFAX oyendetsa ndi firmware 82.00A82 ndi chiwonetsero kusinthira ku malo olephera pansi pa kulemedwa kwakukulu, mwachitsanzo, pomanganso zosungirako pambuyo powonjezera galimoto yatsopano kumagulu (resilvering). Amakhulupirira kuti vutoli limapezeka pamitundu ina ya WD Red yokhala ndi firmware yomweyo. Vuto likachitika, diski imayamba kubweza nambala yolakwika ya IDNF (Sector ID Not Found) ndipo imakhala yosagwiritsidwa ntchito, yomwe imachitidwa mu ZFS ngati kulephera kwa disk ndipo kungayambitse kutayika kwa deta yosungidwa pa diski. Ngati ma disks angapo alephera, deta mu vdev kapena dziwe ikhoza kutayika. Zimadziwika kuti zolephera zomwe zatchulidwazi zimachitika kawirikawiri - mwa makina pafupifupi XNUMX a FreeNAS Mini omwe amagulitsidwa omwe anali ndi ma disk ovuta, vuto lidawonekera pogwira ntchito kamodzi kokha.

Source: opennet.ru