Echiche RAID
Ebumnuche bụ isi nke RAID bụ ịnye ikike nchekwa dị elu yana nchekwa data na-enweghị isi maka sava buru ibu. Na sistemụ, a na-ahụ RAID dị ka akụkụ ezi uche dị na ya, mana ọ nwere ọtụtụ diski ike (opekata mpe abụọ). Ọ na-eme ka ntinye data nke sistemu nchekwa dịkwuo mma site n'ịkwakọba na iweghachite data n'ofe ọtụtụ diski n'otu oge. Ọtụtụ nhazi RAID nwere usoro zuru oke maka nkwenye/nweghachi, gụnyere ndabere mirroring ozugbo. Nke a na-akwalite nnabata mmejọ nke sistemu RAID ma na-eme ka nkwụsi ike nke sistemu na arụkwaghị ọrụ ya, yabụ okwu a bụ “Redundant.”
RAID bụbu ngwaahịa pụrụ iche na ngalaba SCSI, nke teknụzụ na ọnụ ahịa ya kpachiri, nke gbochiri mmepe ya n'ahịa dị ala. Taa, site na ntozu oke nke teknụzụ RAID na mbọ ndị nrụpụta na-aga n'ihu, ndị injinia nchekwa nwere ike ịnụ ụtọ sistemụ IDE-RAID dị ọnụ ahịa karịa. Ọ bụ ezie na IDE-RAID nwere ike ọ gaghị adaba na SCSI-RAID n'ihe gbasara nkwụsi ike na ntụkwasị obi, uru arụmọrụ ya karịa otu draịva siri ike na-adọrọ mmasị ọtụtụ ndị ọrụ. N'ezie, maka ọrụ obere ike kwa ụbọchị, IDE-RAID karịrị ike.
Yiri modem, RAID nwere ike ịkewa dịka dabere na ngwanrọ zuru oke, ọkara ngwanrọ/ọkara ngwaike, ma ọ bụ dabere na ngwaike zuru oke. RAID sọftụwia zuru oke na-ezo aka na RAID ebe sistemụ arụmọrụ (OS) na CPU na-arụ ọrụ niile, na-enweghị njikwa/nhazi nke ndị ọzọ (nke a na-akpọkarị RAID ngalaba-processor) ma ọ bụ mgbawa I/O. N'okwu a, ndị CPU na-arụ ọrụ niile metụtara RAID, na-ebute arụmọrụ kacha ala n'etiti ụdị RAID. Semi-software/semi-hardware RAID bụ nke enweghị mgbawa nhazi I/O nke ya, yabụ CPU na mmemme ọkwọ ụgbọ ala na-ahụ maka ọrụ ndị a. Na mgbakwunye, ibe RAID njikwa/nhazi nke ejiri na ọkara ngwanrọ / ọkara-hardware RAID nwere oke oke na enweghị ike ịkwado ọkwa RAID dị elu. RAID ngwaike zuru oke na-agụnye njikwa / nhazi RAID nke ya yana ibe nhazi I/O, yana gụnyekwara ihe nchekwa ihe (Array Buffer). Ọ na-enye ọrụ kacha mma n'ozuzu ya na ojiji CPU n'etiti ụdị atọ a, mana ọ na-abịa na ọnụ ahịa akụrụngwa kachasị elu. Kaadị IDE RAID oge mbụ na nne nne na-eji HighPoint HPT 368, 370, na ibe PROMISE ka a na-ahụta ọkara-software/semi-hardware RAID, ebe ha enweghị ndị nhazi I/O raara onwe ha nye. Ọzọkwa, RAID njikwa / nhazi ibe sitere na ụlọ ọrụ abụọ a nwere ikike dị oke ma ghara ijikwa ọrụ nhazi dị mgbagwoju anya, n'ihi ya, ọ naghị akwado ọkwa RAID 5. Ihe atụ pụtara ìhè nke RAID ngwaike zuru oke bụ kaadị AAA-UDMA RAID nke Adaptec mepụtara. Ọ na-egosipụta onye na-arụ ọrụ RAID dị elu raara onwe ya nye na Intel 960 specialized I/O processor, na-akwado RAID larịị 5. Ọ na-anọchi anya ngwaahịa IDE-RAID kachasị elu dị ugbu a. Tebụl 1 na-atụnyere RAID ngwanrọ na ngwaike RAID na ngwa ụlọ ọrụ.
Oge nzipu: Jul-11-2023
