I-RAID Concept
Inhloso eyinhloko ye-RAID ukuhlinzeka ngamakhono okugcina aphezulu kanye nokuphepha kwedatha okungadingekile kumaseva amakhulu. Ohlelweni, i-RAID ibonakala njengokuhlukanisa okunengqondo, kodwa yakhiwe ngamadiski aqinile amaningi (okungenani amabili). Ithuthukisa kakhulu ukuphuma kwedatha yesistimu yokulondoloza ngokugcina ngesikhathi esisodwa kanye nokukhipha idatha kuwo wonke amadiski amaningi. Izilungiselelo eziningi ze-RAID zinezinyathelo eziphelele zokuqinisekisa/ukuthola kabusha okuhlanganyelwe, okuhlanganisa nokwenza isipele esibukweni esiqondile. Lokhu kukhulisa kakhulu ukubekezelelwa kwamaphutha kwezinhlelo ze-RAID futhi kuthuthukisa ukuzinza kwesistimu nokungadingeki, yingakho igama elithi “Redundant.”
I-RAID ibikade ingumkhiqizo okhethekile esizindeni se-SCSI, esinqunyelwe ubuchwepheshe bayo nezindleko, ezithiye ukuthuthukiswa kwayo emakethe esezingeni eliphansi. Namuhla, ngokukhula okwandayo kobuchwepheshe be-RAID nemizamo eqhubekayo yabakhiqizi, onjiniyela besitoreji bangajabulela izinhlelo ze-IDE-RAID ezingabizi kakhulu. Nakuba i-IDE-RAID ingase ingafani ne-SCSI-RAID mayelana nokuzinza nokuthembeka, izinzuzo zayo zokusebenza ngaphezu kwamadrayivu aqinile angawodwa ziyaheha kubasebenzisi abaningi. Eqinisweni, emisebenzini yansuku zonke enezinga eliphansi, i-IDE-RAID ingaphezu kwamandla.
Ngokufanayo namamodemu, i-RAID ingahlukaniswa ngokuthi i-software-based ngokugcwele, i-semi-software/semi-hardware, noma i-hardware-based ngokugcwele. I-RAID yesofthiwe egcwele ibhekisela ku-RAID lapho konke ukusebenza kusingathwa isistimu yokusebenza (OS) ne-CPU, ngaphandle kokulawula/ukucubungula okuvela eceleni (okuvame ukubizwa ngokuthi i-RAID co-processor) noma i-I/O chip. Kulesi simo, yonke imisebenzi ehlobene ne-RAID yenziwa yi-CPU, okuholela ekusebenzeni okuphansi kakhulu phakathi kwezinhlobo ze-RAID. I-semi-software/semi-hardware RAID ngokuyinhloko ayinayo i-chip ye-I/O yokucubungula, ngakho-ke i-CPU nezinhlelo zomshayeli zinesibopho sale misebenzi. Ukwengeza, ama-RAID okulawula/ukucubungula ama-chip asetshenziswa ku-semi-software/semi-hardware RAID ngokuvamile anamakhono alinganiselwe futhi awakwazi ukusekela amazinga aphezulu e-RAID. I-RAID yezingxenyekazi zekhompuyutha ngokugcwele ihlanganisa eyakho i-RAID yokulawula/ukucubungula kanye ne-I/O yokucubungula ama-chip, futhi ifaka nebhafa yohlelo (Array Buffer). Inikeza ukusebenza okuhle kakhulu okuphelele nokusetshenziswa kwe-CPU phakathi kwalezi zinhlobo ezintathu, kodwa futhi iza nezindleko eziphezulu kakhulu zemishini. Amakhadi e-IDE RAID angaphambi kwesikhathi namabhodi omama asebenzisa i-HighPoint HPT 368, 370, nama-chips we-PROMISE ayebhekwa njenge-semi-software/semi-hardware RAID, njengoba ayengenawo ama-I/O processors azinikele. Ngaphezu kwalokho, i-RAID yokulawula/ukucubungula ama-chips avela kulezi zinkampani ezimbili ayenamandla alinganiselwe futhi ayikwazanga ukusingatha imisebenzi yokucubungula eyinkimbinkimbi, yingakho ingasekeli izinga le-RAID 5. Isibonelo esiphawulekayo se-RAID yehadiwe ngokugcwele yikhadi le-RAID le-AAA-UDMA elikhiqizwe i-Adaptec. Ihlanganisa i-RAID co-processor ezinikele yezinga eliphezulu kanye ne-Intel 960 ekhethekile ye-I/O processor, esekela ngokugcwele i-RAID level 5. Imele umkhiqizo othuthuke kakhulu we-IDE-RAID otholakalayo njengamanje. Ithebula 1 liqhathanisa isoftware ejwayelekile ye-RAID kanye nehadiwe RAID ezinhlelweni zokusebenza zemboni.
Isikhathi sokuthumela: Jul-11-2023
