Ukungahambelani phakathi kwe-WD SMR drives kunye ne-ZFS ichongiwe, enokuthi ikhokelele ekulahlekeni kwedatha

I-iXsystems, umphuhlisi weprojekthi yeFreeNAS, walumkisa malunga neengxaki ezinzulu ngokuhambelana ne-ZFS kunye nezinye ze-WD ezibomvu ze-hard drives ezikhutshwe yi-Western Digital usebenzisa i-SMR (iShingled Magnetic Recording) iteknoloji. Kwimeko embi kakhulu, ukusebenzisa i-ZFS kwiidrive eziyingxaki kunokubangela ukulahleka kwedatha.

Iingxaki zivela nge-WD Red drives kunye namandla ukusuka kwi-2 ukuya kwi-6 TB, eveliswe ukususela ngo-2018, esebenzisa iteknoloji yokurekhoda. I-DM-SMR (Isixhobo esiLawulwayo seShingled Magnetic Recording) kunye ziphawulwe Ileyibhile ye-EFAX (yeediski zeCMR isiphawuli se-EFRX sisetyenziswa). Western Digital qaphele kwiblogi yakhe yokuba i-WD Red SMR drives yenzelwe ukusetyenziswa kwi-NAS yasekhaya kunye namashishini amancinci, afaka akukho ngaphezu kwe-8 drives kwaye inomthwalo we-180 TB ngonyaka, eqhelekileyo yokugcinwa kunye nokwabelana ngefayile. Isizukulwana sangaphambili se-WD Red drives kunye neemodeli ezibomvu ze-WD ezinomthamo we-8 TB okanye ngaphezulu, kunye nokuqhuba ukusuka kwi-WD Red Pro, i-WD Gold kunye nemigca ye-WD Ultrastar, iyaqhubeka nokuveliswa ngokusekelwe kwi-CMR (i-Conventional Magnetic Recording) iteknoloji. kwaye ukusetyenziswa kwabo akubangeli iingxaki ngeZFS.

Ingundoqo yetheknoloji ye-SMR kukusetyenziswa kwentloko yamagnetic kwidiski, ububanzi bayo bukhulu kunobubanzi bomzila, okukhokelela ekurekhodweni ngokugqithiswa kwenxalenye yomzila osondeleyo, okt. naziphi na iziphumo zokurekhoda kwakhona kwimfuno yokurekhoda kwakhona iqela lonke leengoma. Ukwandisa umsebenzi ngeedrive ezinjalo, kusetyenziswa ukucandwa komhlaba - indawo yokugcina ihlulwe ibe yimimandla eyenza amaqela eebhloko okanye amacandelo, apho kuphela ukongezwa okulandelelanayo kwedatha kuvunyelwe kunye nokuhlaziya lonke iqela leebhloko. Ngokubanzi, iidrive ze-SMR zisebenza ngamandla, zifikeleleka ngakumbi, kwaye zibonisa izibonelelo zokusebenza zokubhala ngokulandelelanayo, kodwa i-lag xa ubhala ngokungacwangciswanga, kubandakanya imisebenzi efana nokwakha ngokutsha uluhlu lokugcina.

I-DM-SMR ithetha ukuba usetyenziso lwezowuni kunye nokuhanjiswa kwedatha lulawulwa sisilawuli sedisk kunye nenkqubo enjalo idiski ijongeka njengediski enzima yakudala engadingi manipulations ahlukeneyo. I-DM-SMR isebenzisa idilesi yebhloko engqiqweni engangqalanga (LBA, Idilesi yeBhloko eNgengqiqo), ikhumbuza idilesi enengqiqo kwii-SSD drives. Umsebenzi ngamnye wokubhala ngokungakhethiyo ufuna umsebenzi wokuqokelelwa kwenkunkuma ngasemva, okukhokelela ekuguquguqukeni kokusebenza okungalindelekanga. Inkqubo inokuzama ukusebenzisa ukulungiswa kwezo diski, ikholelwa ukuba idatha iya kubhalwa kwicandelo elichaziweyo, kodwa ngokwenene ulwazi olukhutshwe ngumlawuli lumisela kuphela isakhiwo esinengqiqo kwaye ngokwenene, xa uhambisa idatha, umlawuli uya kusebenzisa iialgorithms zakho ezithathela ingqalelo idatha eyabelwe ngaphambili. Ngoko ke, ngaphambi kokusebenzisa iidiski ze-DM-SMR kwi-pool ye-ZFS, kuyacetyiswa ukuba wenze umsebenzi wokuzikhupha kwaye uzibuyisele kwimeko yazo yangaphambili.

I-Western Digital iye yabandakanyeka ekuhlalutyeni iimeko apho iingxaki zivela khona, apho, kunye ne-iXsystems, izama ukufumana isisombululo kwaye ilungiselele ukuhlaziywa kwe-firmware. Ngaphambi kokupapasha izigqibo malunga nokulungisa iingxaki, iidrives ezine-firmware entsha zicetywa ukuba zivavanywe kwii-storages eziphezulu kunye ne-FreeNAS 11.3 kunye ne-TrueNAS CORE 12.0. Kuxelwa ukuba ngenxa yokutolika okwahlukileyo kwe-SMR ngabavelisi abahlukeneyo, ezinye iintlobo ze-SMR drives azinangxaki nge-ZFS, kodwa uvavanyo olwenziwe yi-iXsystems lugxile kuphela ekujongeni i-WD Red drives esekwe kwitekhnoloji ye-DM-SMR, kunye ne-SMR. iqhuba abanye abavelisi uphando olongezelelweyo luyafuneka.

Okwangoku, iingxaki nge-ZFS zibonakalisiwe kwaye ziphindaphindwa kwiimvavanyo zobuncinci ze-WD Red 4TB WD40EFAX drives nge-firmware 82.00A82 kunye bonakalisa ukutshintshela kwimeko yokungaphumeleli phantsi komthwalo ophezulu wokubhala, umzekelo, xa usenza ugcino luphinde lwakhiwe emva kokongeza idrayivu entsha kwi-array (resilvering). Kukholelwa ukuba ingxaki yenzeka kwezinye iimodeli ezibomvu zeWD ezine-firmware efanayo. Xa kwenzeka ingxaki, idiski iqala ukubuyisela i-IDNF (i-ID yeCandelo ayifunyenwanga) ikhowudi yephutha kwaye ibe yinto engasebenzisekiyo, ephathwayo kwi-ZFS njengokusilela kwediski kwaye kunokukhokelela ekulahlekeni kwedatha egcinwe kwidiski. Ukuba iidiski ezininzi ziyasilela, idatha kwi-vdev okanye echibini inokulahleka. Kuqatshelwe ukuba ukusilela okukhankanyiweyo kwenzeka kunqabile - malunga newaka le-FreeNAS Mini yeenkqubo ezithengisiweyo ezazixhotyiswe ngeediski ezinengxaki, ingxaki yavela kwiimeko zokusebenza kube kanye kuphela.

umthombo: opennet.ru