Ewe, impendulo ekhawulezileyo kwisihloko hayi. Kodwa isenokungabi njalo kwaphela, kodwa kufuneka siqale ekuqaleni. Ngaba yile migaqo I-LMR, i-SMR, i-CMR kunye ne-PMR unokukuva ngakumbi nangakumbi. Ingakumbi ukuba ujonge ukuthenga i-HDD kwaye uzama ukubuza malunga neetekhnoloji ukukhetha elungileyo.
Ngokuqinisekileyo ubonile ukuba mva nje kukho intetho eninzi malunga netekhnoloji ye-SMR ii-hard drive zangoku. Umzekelo, i-Wester Digital, okanye i-WD, isandula ukumilisela iRed Plus kunye neRed Pro imigca ekhethekileyo ye-CMR, kwaye kuye kwafuneka iphume ukuza kungqina iingxaki ngeyunithi zeSMR. Kodwa zithini zonke ezi zizichazi? Yintoni umahluko okhoyo? Ngaba ngokwenene zihambelana neLinux okanye akunjalo? Yonke le mibuzo ndiza kuzama ukuyicacisa ...
Umahluko phakathi kwe-LMR, i-CMR, i-PMR kunye ne-SMR
Intloko yentloko kunye neetyathanga: Seagate Medalist ST33232A
Into yokuqala ekufuneka uyazi kukuba i-HDD hard drive, oko kukuthi, imagneti okanye oomatshini, sebenzisa umazibuthe njengendlela yokubhala nokufunda idatha kumphezulu wediski.
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- I-LMR vs PMR okanye i-CMR
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- SMR
Ngaphandle kokungena kwiinkcukacha ezininzi malunga nokwenziwa kwezitya, kunye nezinye iinkcukacha, ndiye ngqo ukwahlula iindlela ezenziwe ngalo ezi nkumbulo. Oko kukuthi, i iintlobo ze-MRs (Ukurekhodwa kweMagnetic) ezikhoyo:
- Ixesha elide (MRL)Luhlobo lokugcinwa kwedatha apho lugcinwa khona ixesha elide kumphezulu wediski. Intloko yediski enzima iya kuba nakho ukwenza umazibuthe wendawo ngandlela thile (North-South) ukuyila kunye noziro kulwazi olunambambili. Yindlela yeklasikhi ukuba ulwazi lwalugcinwa njani kwiidrive ezindala ezinzima.
- Ukujikeleza (PMR): I-Seagate yenye yeyokuqala ukusebenzisa le teknoloji kwiidrive ezinzima ukusuka kubungakanani be-750 GB. Yayinoncedo olucacileyo kwi-LMR okoko, iyinto eyodwa, idatha nganye ithatha indawo encinci kwaye ulwazi oluninzi lunokugcinwa kwindawo efanayo yediski. Ukongeza, ishushu kancinci ngokugcina ulwazi kwiindawo eziqhelekileyo nezizinzileyo.
- Eqhelekileyo (CMR)Bonke abanye abavelisi baqala ukusebenzisa i-PMR kwii-hard drive zabo, ke oko kwaba yinto eqhelekileyo kolu shishino lwe-hard drive. Kungenxa yoko le nto kwathiwa yi-CMR njengoko yayisele ixhaphakile kwaye iqhelekile. Kodwa iyafana ne-PMR.
- Ukuxutywa (SMR): ngomzabalazo ongapheliyo wokuphumeza uxinizelelo oluphezulu lwedatha kwisentimitha yesikwere, ukuze sikwazi ukwenza iidrive ezinzima ngamandla nangaphezulu kwenani elifanayo lamacwecwe kunye nobukhulu, itekhnoloji yeSMR nayo yadalwa. Uhlobo lokurekhoda olwahlukileyo kolwangaphambili ngokuthi ugxadazelwe. Kolu hlobo lwetekhnoloji, kusetyenziswa intloko yokufunda ukuba incinci kunentloko yokubhala, kwaye iingoma zedatha zibekwe zodwa. Oku kunyusa ukubakho kokurekhodwa kwedatha kwindawo efanayo, oko kukuthi, uxinano luyanda. Ingxaki kukuba kunokuba yimeko yokuba ingoma ibhalwe ngaphezulu xa uzama ukucima okanye ukuguqula idatha egciniweyo, eya kuthi ikhokelele kurhwaphilizo lwedatha. Indlela yokusombulula le ngxaki kukubhala yonke idatha ekufuneka iguqulwe kwicandelo elahlukileyo kwaye xa kukho amaxesha okusetyenziswa kwediski enzima, iyakhathalela ukulungisa idatha kwakhona. Into efana nale yenzekayo kwii-SSDs nge-TRIM kunye nokubonelela ngaphezulu (ukunikezela ngaphezulu). Kodwa oko kuneengxaki, kuba ukubhala okuninzi kufuneka kwenziwe xa kunye nezinye iitekhnoloji kufuneka kwenziwe i-1 ... ke ngoko, ukwanda koxinano kule meko kuneendleko ngokubhala izohlwayo.
Ngamafutshane, kwi ii-drive ezinzima ezithengiswayo, nokuba yeyiphi na into eluhlobo lwayo, unokuzifumanela i-CMR okanye iSMR. Umzekelo:
- Seagate-I-Barracudas eNtsha ukusuka kwi-1TB ukuya kwi-8TB ihlala i-SMR. Ngelixa i-Ironwolf ihlala i-CMR.
- Toshiba- Uninzi lwee-1TB zazo ukuya kwii-6TB zokuqhuba zihlala zi-SMR. Ezinye ezinje ngeX300, P300 kunye ne-N300 zihlala zi-CMR.
- Western Digital: ineentlobo ezahlukeneyo kakhulu, kunye noluhlu oluBomvu oluxuba i-SMR kunye ne-CMR. I-Red Pro yi-CMR, umxube oluhlaza okwesibhakabhaka, abaMnyama zii-CMR ikakhulu ngaphandle kokumbalwa, kwaye i-Purple yi-CMR.
Yintoni enxulumene neLinux?
Ewe, into yokuqala kukuba iLinux ikhona kuninzi lweeseva, kunye nakwiikhompyuter ezininzi. Kwaye oku kusetyenziswa koseto lwe Ukugcinwa kweRAID. Iinkqubo ezingafunekiyo "azihambelani kakuhle" ne-SMR. Okona kuncinci, kufuneka bazi ukuba banee-hard drive ze-SMR okanye ukuba zixutywe nezinye iintlobo zeedrive hard. Ngaphandle koko, zinokubangela iingxaki ezinzulu.
Qaphela ukuba kusetyenziswa iRAID ukubhala ngaxeshanye kwiiyunithi ezininzi ngaxeshanye. Umzekelo, kwi-RAID 1 (isipili okanye isipili), yonke into ebhalwe kwi-hard disk A nayo ibhalelwe u-B ukuze ube nekopi echanekileyo yedatha kwaye kwimeko yokusilela kwenye yeemoto, kufuneka enye indawo yogcino ...
Las utshintsho kwi-SMR zinokwenza ukuba ezi diski zithathe ixesha elide ukubhala idatha xa ithelekiswa nokusetyenziswa kweenkqubo ze-CMR-RAID kuphela. Nangona kunjalo, kukho iinkqubo ze-RAID apho zonke iidrives zazo ziyi-SMR kwaye akukho ngxaki ingako, kodwa kubalulekile ukuba abasebenzi bezobuchwephesha abazinikele ekubambeni ukuqhuba kwinkqubo ye-RAID bayakwazi oku.
Ngapha koko, abanye abantu abathenga ii-drive ezinzima ze-NAS ngoqwalaselo lwe-RAID kunye ne-drive entsha yayiyi-SMR, babona iingxaki zibonakala ziphawula ukuqhuba njenge "zihlazekile" okanye zibone indlela ukwakha kwakhona kwathatha ixesha elide Kunesiqhelo xa ususa enye iyunithi ye-HDD ngenye.
Kodwa ngaphandle kwenkqubo RAID, ikhona Enye ingxaki enkulu ye-SMR, kwaye yinkqubo yefayile ye-XFS, ikwasetyenziswa ngokubanzi kwiindawo zeLinux. I-XFS isetyenziswa ngokubanzi kwi-NAS, kwaye ibangela ukuba ngalo lonke ixesha ufuna ukuphinda ubhale icandelo le-4KB kuthetha ukuba ubhala uphinde ubhale yonke i-256 MB. Oko kwenza ukuba umrhumo wotshintsho ube mbi kakhulu.
Isiphelo, kolu hlobo lobuchwephesha be-RAID kufuneka uphephe ukudibanisa i-SMR kunye ne-CMR kunye ne-NAS ekufuneka uyenzile kuthintele ukusebenzisa iXFS. Kodwa ngokobuqu, ndincoma ukuba ukhethe ii-CMRs kwaye ke thintela umda kunye neentloko ...