Kusawirirana pakati peWD SMR dhiraivha neZFS kwaonekwa, izvo zvinogona kutungamira mukurasikirwa nedata

iXsystems, mugadziri weiyo FreeNAS chirongwa, yambiro nezvematambudziko akakomba nekuenderana kweZFS nemamwe madhiraivha matsva eWD Red akaburitswa neWestern Digital vachishandisa tekinoroji yeSMR (Shingled Magnetic Recording). Mune yakaipisisa-mamiriro ezvinhu, kushandisa ZFS pane zvinetswa madhiraivha kunogona kukonzera kurasikirwa kwedata.

Matambudziko anomuka neWD Red madhiraivha ane hunyanzvi kubva pa2 kusvika 6 TB, yakagadzirwa kubva 2018, inoshandisa tekinoroji yekurekodha. DM-SMR (Device-Managed Shingled Magnetic Recording) uye vanoiswa mucherechedzo EFAX label (yeCMR disks iyo EFRX identifier inoshandiswa). Western Digital zvakanyorwa mublog rake iro WD Red SMR madhiraivha akagadzirirwa kushandiswa muNAS yemba uye mabhizinesi madiki, ayo anoisa asingapfuure 8 madhiraivha uye ane mutoro we180 TB pagore, yakajairika yekuchengetedza uye kugovera faira. Chizvarwa chakapfuura cheWD Red madhiraivha uye WD Red modhi ine huwandu hwe8 TB kana kupfuura, pamwe nemadhiraivha kubva kuWD Red Pro, WD Goridhe uye WD Ultrastar mitsetse, inoramba ichigadzirwa zvichibva paCMR (Conventional Magnetic Recording) tekinoroji. uye kushandiswa kwavo hakukonzeri matambudziko neZFS.

Izvo zvakakosha zve SMR tekinoroji ndiko kushandiswa kwemusoro wemagineti pane dhisiki, iyo hupamhi hukuru kupfuura hupamhi hweiyo track, iyo inotungamira kurekodha nechikamu chinopindirana cheyakatarisana track, i.e. chero kurekodha zvakare kunokonzeresa kudikanwa kwekunyorazve boka rose remakwara. Kuti uwedzere kushanda nemadhiraivha akadaro, inoshandiswa zoning - nzvimbo yekuchengetera yakakamurwa kuita mazones anoumba mapoka ezvivharo kana zvikamu, umo chete sequential kuwedzera kwedata kunobvumidzwa nekuvandudza boka rese remabhuraki. Kazhinji, madhiraivha eSMR ane simba rakawanda, anodhura zvakanyanya, uye anoratidza mabhenefiti ekuita kweanoteedzana kunyora, asi kunonoka kana uchiita zvisina tsarukano kunyora, kusanganisira mashandiro akadai sekuvakazve matura ekuchengetedza.

DM-SMR inoreva kuti mazoning uye kugovera data mashandiro anodzorwa nedhisiki controller uye kune sisitimu dhisiki rakadaro rinotaridzika senge classic hard disk risingadi manipulations akasiyana. DM-SMR inoshandisa isina kunanga zvine musoro block addressing (LBA, Logical Block Addressing), inoyeuchidza zvine musoro kugadzirisa mumadhiraivha eSSD. Kushanda kwega kwega kwekunyora kunoda basa rekuunganidza marara kumashure, zvichikonzera kusatarisika kwekuchinja kwekuita. Iyo sisitimu inogona kuyedza kushandisa optimizations kune akadaro dhisiki, ichitenda kuti iyo data ichanyorerwa kune yakatsanangurwa chikamu, asi chokwadi iyo ruzivo rwakapihwa nemutungamiriri rinotarisa chete chimiro chine musoro uye chokwadi, pakugovera data, mutongi anozoshandisa yayo. ega algorithms ayo anofunga zvakambopihwa data. Naizvozvo, usati washandisa DM-SMR dhisiki mune dziva reZFS, zvinokurudzirwa kuita oparesheni ku zero uye kudzoreredza kune yavo yekutanga.

Western Digital yakabatanidzwa mukuongorora mamiriro ezvinhu anomuka matambudziko, ayo, pamwe neXsystems, ari kuyedza kutsvaga mhinduro uye kugadzirira firmware update. Usati washambadza mhedziso nezve kugadzirisa matambudziko, madhiraivha ane firmware nyowani anorongwa kuti aedzwe pane yakakwira-mutoro storages neFreeNAS 11.3 uye TrueNAS CORE 12.0. Zvinonzi nekuda kwekududzirwa kwakasiyana kweSMR nevagadziri vakasiyana, mamwe marudzi eSMR madhiraivha haana matambudziko neZFS, asi kuyedzwa kunoitwa neXsystems kunongotarisana nekutarisa WD Red madhiraivha zvichienderana neDM-SMR tekinoroji, uye yeSMR. zvinotyaira vamwe vagadziri tsvakurudzo yakawedzerwa inodiwa.

Parizvino, matambudziko neZFS akaratidzirwa uye akadzokororwa mukuedzwa kweinenge WD Red 4TB WD40EFAX madhiraivha ane firmware 82.00A82 uye oneka shanduko kune yekutadza mamiriro pasi peyakanyanya kunyora mutoro, semuenzaniso, paunenge uchiita chigadziriso chekuvakazve mushure mekuwedzera dhiraivha nyowani kune array (resilvering). Zvinotendwa kuti dambudziko rinoitika pane mamwe maWD Red modhi ine firmware yakafanana. Kana dambudziko rikaitika, dhisiki inotanga kudzosa IDNF (Sector ID Haina Kuwanikwa) kodhi yekanganiso uye inova isingagoneki, iyo inobatwa muZFS sekutadza kwedhisiki uye inogona kutungamirira mukurasikirwa kwedata rakachengetwa padhisiki. Kana akawanda madhisiki akatadza, data muvdev kana dziva rinogona kurasika. Zvinocherechedzwa kuti kutadza kutaurwa kunoitika kashoma - kubva pazviuru zveFreeNAS Mini masisitimu akatengeswa aive akashongedzerwa nemadhisiki anonetsa, dambudziko rakaonekwa mumamiriro ekushanda kamwe chete.

Source: opennet.ru