Inkcazo ye-Hard Drive's Search Time
Ixesha elifunayo lixesha elithatha inxalenye ethile ye- mechanics ye-hardware ye- mechanics ukufumana inkqutyana ethile yolwazi kwisixhobo sokugcina. Eli xabiso libonakaliswe kwiimillisecond (ms), apho ixabiso elincinci libonisa ixesha lokukhawuleza.
Liliphi ixesha elifunayo alikho inani elipheleleyo lexesha elithathayo ukukopisha ifayile kwenye i-drive drive, ukulanda idatha kwi-intanethi, ukutshisa into kwi-disc, njl. Nangona ixesha lokufuna lidlala indima kwixesha elipheleleyo eliyithathayo ukugqiba imisebenzi efana nale, iphantse iyancipha xa kuthelekiswa nezinye izinto.
Funa ixesha libizwa ngokuba lixesha lokufikelela , kodwa ngokwenene ixesha lokufikelela lide ixesha elide kunexesha lokufuna ngenxa yokuba kukho ixesha elincinci lokufikelela phakathi kokufumana idatha kwaye ngokuqinisekileyo ukufikelela kuyo.
Yintoni Ecacisa Ukufuna Isikhathi?
Ixesha lokufuna i- drive enzima yimalini yexesha elithathayo kwintlanganiso yekhanda ye-hard drive (esetyenziselwa ukufunda / ukubhala idatha) ukuba ibe nengalo yayo ye-actuator (apho iintloko ziqhotyoshelweyo) zikwe kwindawo efanelekileyo kwindawo (apho Idatha imlondolozwe ngokwenene) ukuze ufunde / ubhale idatha kwicandelo elithile le disk.
Ekubeni ukuhambisa ingalo yesikhombisi ngumsebenzi wenyama othabatha ixesha ukugqiba, ixesha lokufuna linokuthi liphantse ngokukhawuleza ukuba indawo yentloko isele ihamba ngendlela efanelekileyo, okanye ixesha elide ukuba intloko ihambe kwindawo eyahlukileyo.
Ngako oko, ixesha lokufuna i-hard drive lilinganiselwe lixesha elide lifuna ixesha kuba ingekho yonke i-drive ekhuni iya kuhlala inendibano yayo yesigxina kwindawo efanayo. Ixesha elide lokufuna i-hard drive libalwe ngokukhawuleza ukuba kuthatha ixesha elide ukukhangela idatha ngaphezu kweyesithathu kweengoma ezikhuni.
Icebiso: Bona iphepha le-9 kule PDF kwiwebhusayithi yeYunivesithi yaseWisconsin yeenkcukacha ezithile zemathematika ekusebenziseni ixesha elifanelekileyo lokufuna ixesha.
Nangona umyinge ufuna ixesha yindlela eqhelekileyo yokulinganisa le xabiso, inokuthi yenziwe ngezinye iindlela ezimbini: ukulandelela-ukulandelela kunye nesifo esipheleleyo . I-Track-to-track yimalini yexesha elithathayo ukukhangela idatha phakathi kwamathrekhi adibeneyo, ngelixa i-stroke epheleleyo yimalini yexesha elithathayo ukufuna lonke ubude be disk, ukusuka kwinqanaba eliphambili ukuya kumzila ongaphandle.
Amanye amadivaysi okugcina amashishini anemitshini ekhuni eyenziwa ngamancinci kumandla ukwenzela ukuba kukho iingcingo ezingaphantsi, emva koko vumela i-actuator ukuba ibanga elifutshane ukuhamba ngaphaya kweendlela. Oku kubizwa ngokufutshane .
La magama asemagqabini anzima ayengaqhelekanga kwaye adideke ukulandela, kodwa yonke into ofuna ngokwenene ukuba ifuna ixesha le-hard drive yimalini yexesha elithatha i-drive ukuba lifumane idatha ekulindele, ngoko ke ixabiso elincinci limele ixesha lokufuna ngokukhawuleza kunelikhulu.
Funa Iimviwo zexesha leMpahla eViweyo
Umyinge ufune ixesha lokuqhuba ngokukhawuleza ukuphuculwa kancinci ngaphezu kwexesha, kunye neyokuqala (IBM 305) enexesha lokufuna malunga ne-600 ms. Esi sibini emva kweminyaka emithathu sibona i-HDD yokufuna ixesha lokuba malunga ne-25 ms. Iimoto ezinzima zanamhlanje zinokufuna ixesha elide malunga ne-9 ms, izixhobo eziphathekayo ezi-12 ms, kunye neeseva eziphezulu ezifikelela kwi-4 ms yokufuna ixesha.
Ukuqhutshwa kanzima kombuso (SSDs) akunazo izinto ezihambayo ezinjengeemoto ezijikelezayo ezenzayo, ngoko ke amaxesha abo afunayo alinganiswa ngokungafaniyo, kunye ne-SSD ezininzi ezinexesha lokufuna phakathi kwe-0.08 kunye ne-0.16 ms.
Ezinye iirdware, njenge- disc optical drive kunye ne- floppy disk drive , inentloko enkulu kune-hard drive kwaye ngoko ufune ixesha elide. Ngokomzekelo, iiDVD kunye neeCD zifuna ixesha eliphakathi kwe-65 ms kunye ne-75 ms, elona ludlulileyo kakhulu kunelokhu lukhuni.
Ngaba Ufuna Ixesha Elibalulekileyo Lonke Libalulekileyo?
Kubalulekile ukuqaphela ukuba ngelixa ixesha lokufuna lidlala indima ebalulekileyo ekuqaliseni isantya esiphezulu sekhompyutheni okanye esinye isixhobo, kukho ezinye izixhobo ezisebenza kwinqanaba elilinganayo.
Ngoko ukuba ufuna ukufumana i-hard drive entsha ukukhawulezisa ikhompyutha yakho, okanye ukuthelekisa iifowuni ezininzi ukuba ubone ukuba ngubani okhawuleza, khumbula ukuqwalasela ezinye iinkalo ezifana nememori yesistimu , i- CPU , inkqubo yefayili kunye nesofthiwe eqhuba i sixhobo.
Ngokomzekelo, ixesha elipheleleyo elithathayo ukwenza into efana neyokukhuphela ividiyo kwi-intanethi ayinakho konke ukuyenza ngexesha lokufuna i-hard drive. Nangona kuyi nyaniso ukuba ixesha lokugcina ifayile kwi disk lithembele ngethuba lokufuna, linikezelwe ukuba i-drive engasebenzi ayisebenzanga ngokukhawuleza, kwimeko efana nale xa ukhupha iifayile, isantya esiphezulu sithonyelwa yindlela yamanqwanqwa enethiwekhi.
Ingcamango efanayo iyasebenza kwezinye izinto ozenzayo njengokuguqula iifayile , ukukrazula iiDVD kwi-hard drive, kunye nemisebenzi efanayo.
Ngaba Unokuphucula i-HDD & # 39; s Ukufuna ixesha?
Nangona ungeke wenze nantoni na ukukhawulezisa izakhiwo zomzimba we-hard drive ukwenzela ukwandisa ixesha layo lokufuna, kukho izinto ongayenza ukuphucula ukusebenza jikelele. Oku kungenxa yokuba i-drive yokufuna ixesha yodwa ayiyena kuphela into eyenza ukusebenza.
Omnye umzekelo kukunciphisa ukwahlukana ngokusebenzisa ithuluzi lokukhusela elikhululekile . Ukuba iifayili zefayili zisasazeka zonke malunga ne-hard drive kwiinqununu ezihlukeneyo, kuya kuthatha ixesha elingakumbi kwi-drive ekhuni ukuyiqokelela kunye nokuyilungisa kwisiqulatho esiqinileyo. Ukuxhatshaza i-drive ingadibanisa ezi fayili kwifayile ukuphucula ixesha lokufikelela.
Ngaphambi kokuba udibanise, unokucinga ukuba ususe iifayile ezingasetshenziswanga njengeekhredithi zesibhrawuzi, ukukhupha i-Recycle Bin, okanye ukuxhasa idatha engayisebenzisiyo inkqubo yokusebenza, okanye inkonzo yokugcina inkululeko . Ngaloo ndlela i-hard drive ayinakuze ihluthe yonke loo datha rhoqo ngexesha kufuneka ifunde okanye ibhale into kwi disk.