Raid Array - daws cov teeb meem nrog rau cov nyeem / sau ceev thiab kev cia siab ntawm lub cev

Raid array - yog ob peb thiab ob tog neeg sab nraud drives, uas sib thooj los raws khiav hauj lwm rau ib tug txaus siab ceev. Lub system yuav siv sij hawm no lub koom haum raws li ib tug tib disk array. Tswj lub tsev ntawm kev nyeem ntawv thiab sau ntawv txheej txheem yog ua li cas los ntawm lub maub los.

Raid array yog siv nyob rau hauv yuav ua kom cov cov ntaubntawv povthawj siv ceev los yog kev ntseeg ntawm cov disk cia. Cov tshuaj ntawm cov teeb meem yuav ho txhim kho lub zuag qhia tag nrho efficiency ntawm lub tag nrho qhov system.

Xub thawj, lub creation ntawm RAID-array yuav pooling ntawm pheej yig Disks. Qhov no teg num kom meej meej reflected nyob rau hauv lub title (ib tug tsiaj ntawv txhais tau tias cov nram qab no: "redundant Array ntawm pheej yig Disks"). Tab sis, ces, qhov no technology muaj pov thawj los ua ib tug zoo thiab txhim khu kev qha, hloov. Niaj hnub nimno tua array yog tsim, raws li ib tug txoj cai, nyob rau lub hauv paus ntawm haum kim khoom. Qhov no, nyob rau hauv lem, yog dua reflected nyob rau hauv lub title (tam sim no es rau "redundant Array ntawm Independent Disks").

Cov kev loj hlob ntawm ib tug ntaub ntawv haiv neeg tau pab los ntawm cov kev cai uas yog muab tso rau pem hauv ntej rau cov kev kho vajtse, xws li cov ntaub ntawv khw muag khoom noj. Yog li ntawd, raws li ntev raws li lub tua-array raug tsim, muaj ntau ntau yam podtehnology, uas tau tsim nyob rau tej compartmentalized paub tab.

Tag nrho cov ntau yam ntawm cov teeb meem daws tau los ntawm computers yuav tsum tau ntau npaum li ntau yam ntawm kev siv technology. Hom tua arrays:

• RAID-0. Nyob rau hauv lub nyuaj siv yuav tsum tau ob drives. Info los cov ntaubntawv povthawj siv chav tsev puv rau ob drives. Nyeem Ntawv yuav rov qab txheej txheem. Qhov no ho speeds cov ntaub ntawv, tiam sis tsis muab txaus ntseeg, vim hais tias ib tug yuam kev nyob rau hauv ib tug ntawm cov discs ua rau tsis ntawm cov ntaub ntawv nyob rau hauv tag nrho cov array.
• RAID-1. Nyob rau hauv lub nyuaj siv yuav tsum tau ob drives. Cov ntaub ntawv muaj nyob rau hauv lub discs kaw rau lawv nyob rau hauv tag nrho. Qhov no slows cia rau cov ntaubntawv povthawj txheej txheem, tab sis vim yog tsis redundancy muab ib theem siab ntawm kev ntseeg. Lub ntsiab kom zoo dua ntawm no txoj kev loj hlob - lub siab txaus thiab ceev ceev nyeem (vim hais tias nws yog ua tau los nyeem los ntawm ob drives ib txhij).
• RAID-5. Ib tug tim-thaiv array. Nyob rau hauv lub nyuaj kev siv, koj yuav tsum muaj peb disks. Tej ntaub ntawv cov ntaubntawv povthawj siv tshwm sim los ntawm tawg cov ntaub ntawv kwj mus rau hauv blocks, txhua tus uas yog muab rau tus checksum. Nyob rau hauv cov kev tshwm sim ntawm cov ntaub ntawv poob rau ib qho ntawm lub discs, koj yuav tsa tau lawv rov siv checksums kaw nyob rau hauv lwm. Rov qab yuav tsum tau cov kev faib nyiaj ntawm ib tug loj muaj peev xwm, yog li feem ntau ntawm no siv yog siv rau neeg rau zaub mov kev kho vajtse.

Raid array fifth realization yog lub feem ntau. Qhov no yog vim nws muaj kev cia siab thiab kev kub ceev ua ntawm cov ntaub ntawv, vim muaj ib zaug xwb array yuav nqa tawm ib txhij ob peb ywj siab dab teev thiab nyeem ntawv ntxiv.