Disk Arrays RAID: nws yog dab tsi thiab vim li cas nws yog tsim nyog?

Muaj ntau cov neeg siv tau hnov ntawm xws li ib tug tshaj plaws li lub RAID disk arrays, tab sis nyob rau hauv kev xyaum heev ob peb cov neeg tam sim no xav txog tej yam dab tsi nws yog. Tab sis thaum nws puv, muaj yog tsis muaj dab tsi nyuab no. Cia peb kawm cov essence ntawm lub sij hawm, uas yog, nyob rau hauv cov ntiv tes, nyob rau hauv lub hauv paus ntawm tus piav ntaub ntawv rau qhov nruab nrab pej xeem.

Yuav ua li cas yog disk arrays RAID?

Yuav pib, xav txog lub zuag qhia tag nrho kev kho mob uas yog muaj nyob hauv internet ntawv. Disk Arrays - ib tug tag nrho cia system, muaj raws ntawm ib tug hnav ntawm ob los yog ntau tshaj ib qho nyuaj drives, neeg ua hauj lwm, los yog ua rau kom cov kev ceev ntawm kev nkag tau mus muab ntaub ntawv, los yog rau lub Individuals, piv txwv li, thaum koj txuag lub backup luam.

Nyob rau hauv no tau nyiaj lub ntsiab nyob rau hauv cov nqe lus ntawm installation raws muaj tsis muaj kev txwv. Nws tag nrho cov nyob rau hauv lub xov tooj ntawm kev sib txuas kev txhawb los ntawm lub motherboard. Ua tau, yog vim li cas yog siv disk arrays RAID? Nws yog ib nqi kom nco ntsoov tias nyob rau hauv cov kev taw qhia ntawm technology txoj kev loj hlob (txog kev namely nyuaj drives), lawv tau ntev lawm khov ntawm ib tug taw tes (ntxaiv ceev ntawm 7200 rpm. / Min, cache loj, thiab thiaj li nyob. D.). Tsuas yog ib tug nyob rau hauv no hais txog tsuas yog SSD qauv, tab sis lawv tsuas ua rau kom nyob rau hauv volume ua mas. Nyob rau tib lub sij hawm nyob rau hauv zus tau tej cov processors los yog RAM planks vam meej ntau tangible. Yog li, los ntawm kev siv ntawm RAID-arrays yog nqa nce kev loj hlob kev ua tau zoo thaum tus txheejtxheem lub hard disk drives.

Disk Arrays RAID: hom, hom phiaj

Raws li rau lub arrays lawv tus kheej, lawv muaj peev xwm yuav conditionally muab faib los ntawm numbering siv (0, 1, 2, thiab thiaj li nyob. D.). Txhua tooj sau raws nkaus Ii rau qhov kev siv ntawm ib qho ntawm cov tau thov kev tso cai.

Lub ntsiab nyob rau hauv no kev faib yog disk arrays nrog cov zauv 0 thiab 1 (hereinafter, nws yuav tsum to taub yog vim li cas), vim hais tias nws yog muab rau lawv lub ntsiab qhov teeb meem.

Thaum tsim arrays muaj ntau drives kev cob cog rua chiv siv cov BIOS teeb, qhov chaw uas lub seem SATA RAID configuration, teem ib tus nqi. Nws yog ib qho tseem ceeb yuav tau nco ntsoov hais tias cov kev cob cog rua drives yuav tsum raws nraim tib yam tsis nyob rau hauv cov nqe lus ntawm lub ntim, interface, connectivity, cache, thiab hais txog. D.

RAID 0 (Striping)

Xoom disk arrays yog inherently tsim kom nkag tau mus rau muab cov ntaub ntawv (sau ntawv los yog nyeem ntawv). Lawv feem ntau yog yuav ua tau nyob rau hauv tandem los ntawm ob mus rau plaub drives.

Tiam sis ntawm no lub ntsiab qhov teeb meem yog hais tias thaum koj rho tawm cov ntaub ntawv rau ib tug disk, nws disappears, thiab lwm tus neeg. Cov ntaub ntawv yog kaw nyob rau hauv blocks qho rau txhua disk, thiab cov kev ua tau zoo nce yog ncaj qha proportional rau tus xov tooj ntawm drives (ie, plaub discs ob zaug li sai raws li ob tug). Tab sis ntawm no yog lub poob ntawm cov ntaub ntawv muaj feem xyuam tsuas rau lub fact tias cov chav nyob tej zaum yuav nyob sib txawv drives, txawm tias cov neeg siv yog cov "Explorer," saib cov ntaub ntawv nyob rau hauv lub qub zaub.

RAID 1

Disk arrays nrog ib tug hluas los yuav mus rau hauv qeb ntawm mirroring (mirroring), thiab ua hauj lwm rau txuag los ntawm duplicating cov ntaub ntawv.

Roughly hais lus, nyob rau hauv xws li ib tug teeb meem no rau cov neeg siv loses ib co kev ua tau zoo, tab sis nws yuav ua tau kom zoo nkauj uas nrog lub disappearance ntawm cov ntaub ntawv los ntawm ib tug seem, lawv yuav tsum tau muab cia rau hauv lwm.

RAID 2 thiab saum toj no

Arrays nrog cov zauv 2 thiab saum toj no yog dual lub hom phiaj. Nyob rau hauv ib tes, lawv yog tsim los sau cov ntaub ntawv nyob rau lwm yam - siv rau kev ua yuam kev kho.

Nyob rau hauv lwm yam lus, qhov no hom ntawm cia arrays muab lub peevxwm ntawm RAID 0 thiab RAID 1, tab sis cov computer cov neeg siv tsis txaus siab rau zoo chaw, txawm hais tias lub hauv paus rau lawv ua hauj lwm yog kev siv ntawm lub Hamming code.

Yuav ua li cas yog ib qho zoo rau siv nyob rau hauv kev xyaum?

Ntawm cov hoob kawm, yog tias koj lub computer yuav tsum siv resource-intensive kev pab cuam, xws li niaj hnub ua si, nws yog zoo dua siv arrays ntawm RAID 0. Yog hais tias koj ua hauj lwm nrog ntaub ntawv tseem ceeb yuav tsum tau muab cia rau hauv txhua txoj kev, yuav tau siv rau arrays RAID 1. Nyob rau hauv view ntawm lub fact tias ib tug Rev ntawm cov zauv ob los yog ntau tshaj nrov los yog tsis tau, lawv siv yog txiav txim los ntawm tsuas yog tus neeg siv. Los ntawm txoj kev, cov kev siv ntawm thov array yog cov tswv yim thiab nyob rau hauv cov kev tshwm sim hais tias tus neeg siv feem ntau loads multimedia ntaub ntawv mus rau lub computer, hais tias, movies los yog suab paj nruag uas muaj bitrate rau ib tug MP3 los yog FLAC txheem.

Nyob rau hauv lub so yuav cia siab rau lawv tus kheej nyiam thiab xav tau kev pab. Nws yog los ntawm no thiab yuav yog nyob ntawm seb siv ntawm ib tug array. Thiab ntawm cov hoob kawm, thaum teem phau ntawv yog zoo dua rau muab kev xaiv li cas SSD disks yog muab piv rau cov pa hard disk drives twb chiv muaj ntau dua cov ntaubntawv povthawj siv thiab nyeem ntawv ceev. Tab sis lawv yuav tsum tau kiag li zoo tib yam nyob rau hauv lawv tus yam ntxwv thiab tsis, los yog ib tug ua ke ntawm connectable tsuas yuav tsis ua hauj lwm. Thiab nws yog ib qhov no yog ib lub tseem ceeb tshaj plaws tej yam kev mob. Yog li ntawd nws yog tsim nyog them sai sai mus rau qhov nam.