RAID Concept
Injongo ephambili ye-RAID kukubonelela ngezakhono zokugcina eziphezulu kunye nokhuseleko lwedatha olungafunekiyo kwiiseva ezinkulu. Kwinkqubo, i-RAID ibonwa njengesahlulelo esinengqiqo, kodwa yenziwe ngeediski ezinzima ezininzi (ubuncinci ezimbini). Iphucula kakhulu i-throughput yedatha yenkqubo yokugcina ngokugcina kunye nokubuyisela idatha kwiidiski ezininzi. Ulungelelwaniso oluninzi lwe-RAID lunamanyathelo abanzi okuqinisekisa / ukubuyiswa kwakhona, kubandakanya ukugcinwa kwesipili esithe ngqo. Oku kuphucula kakhulu ukunyamezela impazamo kwiinkqubo ze-RAID kwaye kuphuculwe uzinzo lwenkqubo kunye nokungafuneki, kungoko igama elithi "Redundant."
I-RAID yayisetyenziselwa ukuba yimveliso ekhethekileyo kwi-domain ye-SCSI, inqunyelwe iteknoloji kunye neendleko, ezithintele ukuphuhliswa kwayo kwimarike ephantsi. Namhlanje, ngokukhula okwandayo kwetekhnoloji ye-RAID kunye nemizamo eqhubekayo ngabavelisi, iinjineli zokugcina zinokonwabela iinkqubo ze-IDE-RAID ezingabizi kakhulu. Nangona i-IDE-RAID isenokungahambelani ne-SCSI-RAID ngokozinzo nokuthembeka, iingenelo zayo zokusebenza ngaphezulu kwee-hard drives zodwa ziyahenda kubasebenzisi abaninzi. Enyanisweni, kwimisebenzi yemihla ngemihla ephantsi, i-IDE-RAID ingaphezu kwamandla.
Ngokufanayo neemodem, i-RAID inokuhlelwa njenge-software-based, i-semi-software/semi-hardware, okanye i-hardware-based ngokupheleleyo. I-RAID ye-software epheleleyo ibhekisela kwi-RAID apho zonke izinto ezisebenzayo ziphathwa yinkqubo yokusebenza (i-OS) kunye ne-CPU, ngaphandle kokulawula / ukucutshungulwa komntu wesithathu (eyaziwa ngokuba yi-RAID co-processor) okanye i-chip ye-I / O. Kule meko, yonke imisebenzi enxulumene ne-RAID yenziwa yi-CPU, ekhokelela ekusebenzeni okuphantsi kakhulu phakathi kweentlobo ze-RAID. I-Semi-software / i-semi-hardware i-RAID ngokuyinhloko ayinayo i-chip ye-I / O yokucubungula, ngoko ke i-CPU kunye neenkqubo zomqhubi zijongene nale misebenzi. Ukongeza, ulawulo lwe-RAID / ukusetyenzwa kweetshiphu ezisetyenziswa kwi-semi-software/semi-hardware RAID ngokubanzi zinamandla alinganiselweyo kwaye azinakuxhasa amanqanaba aphezulu e-RAID. I-RAID ye-hardware epheleleyo iquka ulawulo/ukusetyenzwa kwayo kwe-RAID kunye ne-I/O yokusetyenzwa kweetshiphusi, kwaye iquka i-array buffer (Array Buffer). Inika eyona ntsebenzo ibalaseleyo kunye nokusetyenziswa kwe-CPU phakathi kwezi ntlobo zintathu, kodwa iza neendleko eziphezulu zezixhobo. Amakhadi okuqala e-IDE RAID kunye neebhodi zomama ezisebenzisa i-HighPoint HPT 368, 370, kunye ne-PROMISE chips zazithathwa njenge-semi-software/semi-hardware RAID, njengoko zingenazo iiprosesa ze-I/O ezizinikeleyo. Ngaphezu koko, i-RAID yokulawula / ukucutshungulwa kwee-chips eziphuma kwezi nkampani zimbini zinezakhono ezilinganiselweyo kwaye azikwazanga ukusingatha imisebenzi enzima yokucubungula, ngoko ke ayixhasi inqanaba le-RAID 5. Umzekelo ophawulekayo we-RAID ye-hardware epheleleyo yikhadi le-RAID ye-AAA-UDMA eveliswa yi-Adaptec. Ibonisa i-RAID ye-co-processor ezinikeleyo ephezulu kunye ne-Intel 960 ekhethekileyo ye-I / O iprosesa, ixhasa ngokupheleleyo i-RAID level 5. Imele imveliso ye-IDE-RAID ephezulu kakhulu ekhoyo ngoku. Itheyibhile 1 ithelekisa i-RAID yesoftware eqhelekileyo kunye ne-hardware RAID kwizicelo zeshishini.
Ixesha lokuposa: Jul-11-2023
