RAID Khopolo
Morero oa mantlha oa RAID ke ho fana ka bokhoni ba polokelo ea maemo a holimo le ts'ireletso ea data e sa hlokahaleng bakeng sa li-server tse kholo. Ka tsamaiso, RAID e nkoa e le karohano e utloahalang, empa e entsoe ka li-disk tse ngata tse thata (bonyane tse peli). E ntlafatsa haholo ts'ebetso ea data ea sistimi ea polokelo ka ho boloka le ho khutlisa data ho li-disk tse ngata ka nako e le 'ngoe. Litlhophiso tse ngata tsa RAID li na le mehato e felletseng ea netefatso / ho hlaphoheloa, ho kenyelletsa le ho boloka seipone ka kotloloho. Sena se ntlafatsa haholo mamello ea liphoso tsa litsamaiso tsa RAID le ho ntlafatsa botsitso ba sistimi le ho se sebetse, ka hona lentsoe "Redundant."
RAID e kile ea e-ba sehlahisoa se ikhethileng sebakeng sa SCSI, se lekanyelitsoeng ke theknoloji le litšenyehelo tsa eona, tse neng li sitisa tsoelo-pele ea eona 'marakeng o tlaase. Kajeno, ka kholo e ntseng e eketseha ea thekenoloji ea RAID le boiteko bo tsoelang pele bo etsoang ke bahlahisi, baenjiniere ba polokelo ba ka natefeloa ke litsamaiso tsa IDE-RAID tse batlang li le litšenyehelo li ngata. Leha IDE-RAID e kanna ea se ts'oane le SCSI-RAID mabapi le botsitso le ts'epahalo, melemo ea ts'ebetso ea eona ho feta li-hard drive tse le 'ngoe e hohela basebelisi ba bangata. Ebile, bakeng sa ts'ebetso e tlase ea letsatsi le letsatsi, IDE-RAID e feta bokhoni.
Joalo ka li-modem, RAID e ka aroloa e le software-based ka botlalo, semi-software/semi-hardware, kapa e thehiloeng ho Hardware ka botlalo. RAID ea software e felletseng e bua ka RAID moo lits'ebetso tsohle li sebetsoang ke sistimi ea ts'ebetso (OS) le CPU, ntle le taolo / ts'ebetso ea motho oa boraro (eo hangata e bitsoang RAID co-processor) kapa chip ea I/O. Tabeng ena, mesebetsi eohle e amanang le RAID e etsoa ke CPU, e hlahisang katleho e tlaase ka ho fetisisa har'a mefuta ea RAID. Semi-software/semi-hardware RAID haholo-holo ha e na I/O ea eona ea ho sebetsana le chip, kahoo CPU le mananeo a mokhanni a ikarabella bakeng sa mesebetsi ena. Ho feta moo, li-chips tsa taolo ea RAID / ts'ebetso ea ts'ebeliso e sebelisoang ho semi-software/semi-hardware RAID ka kakaretso li na le bokhoni bo fokolang mme ha li khone ho ts'ehetsa maemo a phahameng a RAID. RAID ea Hardware e felletseng e kenyelletsa taolo ea eona ea RAID / ts'ebetso le li-chips tsa I/O, mme e kenyelletsa le buffer e fapaneng (Array Buffer). E fana ka ts'ebetso e ntle ka ho fetisisa ea kakaretso le ts'ebeliso ea CPU har'a mefuta ena e meraro, empa hape e tla le litšenyehelo tse phahameng ka ho fetisisa tsa thepa. Likarete tsa pele tsa IDE RAID le liboto tsa bo-mme tse sebelisang HighPoint HPT 368, 370, le li-chips tsa PROMISE li ne li nkoa e le semi-software/semi-hardware RAID, kaha li ne li se na li-processor tsa I/O tse inehetseng. Ho feta moo, lisebelisoa tsa RAID tsa ho laola / ho sebetsana le lik'hamphani tsena tse peli li ne li e-na le bokhoni bo fokolang 'me li ne li sitoa ho sebetsana le mesebetsi e rarahaneng ea ho sebetsa, ka hona e sa tšehetse boemo ba RAID 5. Mohlala o hlokomelehang oa hardware RAID e feletseng ke karete ea AAA-UDMA RAID e hlahisoang ke Adaptec. E na le processor e inehetseng ea boemo bo holimo ea RAID le processor e ikhethang ea Intel 960 ea I/O, e tšehetsang RAID ka botlalo boemo ba 5. E emela sehlahisoa se tsoetseng pele ka ho fetisisa sa IDE-RAID se fumanehang hajoale. Letlapa la 1 le bapisa software e tloaelehileng ea RAID le hardware RAID lits'ebetsong tsa indasteri.
Nako ea poso: Jul-11-2023
