RAID Concept
Chinangwa chekutanga cheRAID ndechekupa masimba ekuchengetedza epamusoro-soro uye kusachengetedzwa kwedata remasevha makuru. Muhurongwa, RAID inoonekwa sechikamu chine musoro, asi inoumbwa neakawanda hard disks (angangoita maviri). Iyo inonyanya kunatsiridza iyo data throughput yegadziriro yekuchengetedza nekuchengetedza panguva imwe chete uye kudzoreredza data pamadhisiki akawanda. Mazhinji ma RAID masisitimu ane akakwana matanho ekuwirirana / kudzoreredza, kusanganisira yakananga girazi backup. Izvi zvinowedzera zvakanyanya kukanganisa kushivirira kweRAID masisitimu uye inonatsiridza kugadzikana kwehurongwa uye redundancy, nekudaro izwi rekuti "Redundant."
RAID yaimbove chigadzirwa chakasarudzika muSCSI domain, inoganhurwa nehunyanzvi hwayo uye mutengo, izvo zvaitadzisa kusimukira kwayo mumusika wakaderera. Nhasi, nekukura kuri kuwedzera kweRAID tekinoroji uye kuenderera mberi kuedza nevagadziri, mainjiniya ekuchengetedza anogona kunakidzwa neinodhura-inoshanda IDE-RAID masisitimu. Kunyangwe IDE-RAID ingasaenderane neSCSI-RAID maererano nekugadzikana uye kuvimbika, mabhenefiti ayo ekuita pane imwechete hard drive inokwezva kune vakawanda vashandisi. Muchokwadi, kwezuva nezuva kuderera-kusimba mashandiro, IDE-RAID inopfuura kugona.
Zvakafanana nemamodemu, RAID inogona kuiswa muchikamu seyakakwana software-based, semi-software/semi-hardware, kana yakazara hardware-yakavakirwa. Fully software RAID inoreva RAID uko zvese zvinoshanda zvinobatwa neiyo inoshanda sisitimu (OS) uye CPU, pasina yechitatu-bato kutonga/kugadzirisa (inowanzo kunzi RAID co-processor) kana I/O chip. Muchiitiko ichi, mabasa ese ane chekuita neRAID anoitwa neCPU, zvichikonzera kuderera kwakanyanya pakati pemhando dzeRAID. Semi-software/semi-hardware RAID inonyanya kushaya I/O yayo yekugadzirisa chip, saka CPU nemapurogiramu emutyairi ane basa remabasa aya. Pamusoro pezvo, iyo RAID inodzora / kugadzirisa machipisi anoshandiswa muhafu-software/semi-hardware RAID kazhinji ane mashoma mashoma uye haakwanise kutsigira akakwira RAID mazinga. Yakazara Hardware RAID inotenderedza yayo RAID kutonga / kugadzirisa uye I / O kugadzirisa machipisi, uye inotosanganisira array buffer (Array Buffer). Inopa kuita kwakanakisa kwese uye kushandiswa kweCPU pakati pemhando nhatu idzi, asi zvakare inouya nemutengo wepamusoro wemidziyo. Ekutanga IDE RAID makadhi uye mamaibhodhi anoshandisa HighPoint HPT 368, 370, uye PROMISE machipisi aionekwa semi-software/semi-hardware RAID, sezvo ivo vaishaya akazvitsaurira I/O processors. Uyezve, RAID control/processing chips kubva kumakambani maviri aya aiva nekwanisi shoma uye aisakwanisa kubata mabasa akaoma ekugadzirisa, saka asingatsigiri RAID level 5. Muenzaniso unozivikanwa we hardware RAID yakakwana ndiyo AAA-UDMA RAID kadhi yakagadzirwa neAdaptec. Inosanganisira yakatsaurirwa yepamusoro-soro RAID co-processor uye Intel 960 specialized I/O processor, inotsigira zvizere RAID level 5. Inomiririra yakanyanyisa yepamusoro IDE-RAID chigadzirwa chiripo iye zvino. Tafura 1 inofananidza yakajairika software RAID uye hardware RAID mumaindasitiri maapplication.
Nguva yekutumira: Jul-11-2023
