Ra'ayin RAID
Manufar farko na RAID ita ce samar da babban ƙarfin ajiya na ƙarshe da ƙarin tsaro na bayanai don manyan sabobin. A cikin tsarin, ana ganin RAID a matsayin bangare mai ma'ana, amma yana kunshe da faifai masu yawa (akalla biyu). Yana da matukar inganta kayan aikin bayanai na tsarin ajiya ta hanyar adanawa da dawo da bayanai a cikin faifai masu yawa. Yawancin jeri na RAID suna da cikakkun matakai don tabbatarwa/murmurewa juna, gami da madadin madubi kai tsaye. Wannan yana haɓaka juriyar rashin kuskuren tsarin RAID kuma yana haɓaka daidaiton tsarin da sakewa, saboda haka kalmar "Redundant."
RAID ya kasance samfuri na keɓancewa a cikin yankin SCSI, iyakance ta fasaharsa da farashi, wanda ya hana ci gabansa a cikin ƙananan kasuwa. A yau, tare da haɓaka balaga na fasahar RAID da ci gaba da ƙoƙarin masana'antun, injiniyoyin ajiya za su iya jin daɗin tsarin IDE-RAID mai inganci. Kodayake IDE-RAID bazai dace da SCSI-RAID ba dangane da kwanciyar hankali da amintacce, fa'idodin aikinsa akan rumbun kwamfyuta ɗaya yana da jan hankali ga masu amfani da yawa. A zahiri, don ayyukan ƙarancin ƙarfi na yau da kullun, IDE-RAID ya fi ƙarfin aiki.
Kama da modem, RAID za a iya rarraba shi azaman cikakken tushen software, Semi-software/Semi-hardware, ko cikakken tushen hardware. Cikakken software RAID yana nufin RAID inda duk ayyuka ke sarrafa su ta tsarin aiki (OS) da CPU, ba tare da wani iko/aiki na ɓangare na uku ba (wanda aka fi sani da RAID co-processor) ko guntu I/O. A wannan yanayin, duk ayyukan da ke da alaƙa da RAID ana yin su ta CPU, wanda ke haifar da mafi ƙarancin inganci tsakanin nau'ikan RAID. Semi-software/Semi-hardware RAID da farko ba shi da guntuwar sarrafa I/O, don haka CPU da shirye-shiryen direba ke da alhakin waɗannan ayyuka. Bugu da ƙari, kwakwalwan sarrafa RAID da aka yi amfani da su a cikin software na rabin-software/wani-hardware RAID gabaɗaya suna da iyakacin iyakoki kuma ba za su iya tallafawa manyan matakan RAID ba. Cikakken kayan aikin RAID ya ƙunshi sarrafa / sarrafawa na RAID nasa da kwakwalwan kwamfuta na sarrafa I/O, har ma ya haɗa da buffer tsararru (Array Buffer). Yana ba da mafi kyawun aikin gabaɗaya da amfani da CPU tsakanin waɗannan nau'ikan guda uku, amma kuma ya zo tare da mafi girman farashin kayan aiki. Katunan IDE RAID na farko da uwayen uwa da ke amfani da HighPoint HPT 368, 370, da kwakwalwan ALKAWARI an dauki su RAID na-tsayi-software/Semi-hardware RAID, saboda ba su da na'urori masu sarrafa I/O. Bugu da ƙari, kwakwalwan sarrafawa / sarrafawa na RAID daga waɗannan kamfanoni guda biyu suna da iyakacin iyakoki kuma ba za su iya gudanar da ayyuka masu rikitarwa ba, saboda haka ba su goyi bayan matakin RAID 5. Wani misali mai mahimmanci na RAID mai cikakken kayan aiki shine katin AAA-UDMA RAID wanda Adaptec ya samar. Yana fasalta ƙwararrun ƙwararrun RAID co-processor da Intel 960 na musamman I/O processor, cikakken goyon bayan matakin RAID 5. Yana wakiltar samfuran IDE-RAID mafi ci gaba a halin yanzu. Tebu 1 yana kwatanta RAID na software na yau da kullun da RAID na hardware a aikace-aikacen masana'antu.
Lokacin aikawa: Jul-11-2023
