ECC nco, tseem hu ua Error-Correcting Code memory, muaj lub peev xwm los kuaj xyuas thiab kho qhov yuam kev hauv cov ntaub ntawv. Nws yog feem ntau siv nyob rau hauv high-end desktop computers, servers, thiab workstations los txhim kho system stability thiab kev nyab xeeb.
Nco yog ib qho khoom siv hluav taws xob, thiab qhov yuam kev tuaj yeem tshwm sim thaum nws ua haujlwm. Rau cov neeg siv uas xav tau kev ruaj ntseg siab, kev nco yuam kev tuaj yeem ua rau muaj teeb meem tseem ceeb. Lub cim xeeb yuam kev tuaj yeem muab faib ua ob hom: qhov yuam kev nyuaj thiab qhov tsis raug muag. Kev ua yuam kev nyuaj yog tshwm sim los ntawm kev puas tsuaj los yog kho vajtse, thiab cov ntaub ntawv tsis raug. Cov yuam kev no kho tsis tau. Ntawm qhov tod tes, qhov yuam kev muag muag tshwm sim vim muaj yam xws li hluav taws xob cuam tshuam ze ntawm lub cim xeeb thiab tuaj yeem kho.
Txhawm rau txheeb xyuas thiab kho qhov yuam kev me me, lub tswv yim ntawm kev nco "parity check" tau qhia. Qhov tsawg tshaj plaws nyob rau hauv lub cim xeeb yog me ntsis, sawv cev los ntawm tog twg los 1 los yog 0. Yim sib law liag khoom ua ib byte. Kev nco tsis muaj kev sib tw tsuas muaj 8 khoom ib byte xwb, thiab yog tias ib qho me me khaws cov nqi tsis raug, nws tuaj yeem ua rau cov ntaub ntawv tsis raug thiab daim ntawv thov ua tsis tiav. Parity check ntxiv ib qho ntxiv me ntsis rau txhua byte raws li qhov yuam kev-checking me ntsis. Tom qab khaws cov ntaub ntawv hauv ib byte, yim cov khoom muaj tus qauv ruaj khov. Piv txwv li, yog tias cov khoom khaws cov ntaub ntawv li 1, 1, 1, 0, 0, 1, 0, 1, cov lej ntawm cov khoom no yog khib (1+1+1+0+0+1+0+1=5 ). Txawm tias parity, qhov parity me ntsis txhais tau tias yog 1; txwv tsis pub, nws yog 0. Thaum CPU nyeem cov ntaub ntawv khaws cia, nws ntxiv rau thawj 8 khoom thiab sib piv cov txiaj ntsig nrog qhov sib npaug me ntsis. Cov txheej txheem no tuaj yeem txheeb xyuas qhov yuam kev ntawm lub cim xeeb, tab sis parity check tsis tuaj yeem kho lawv. Tsis tas li ntawd, parity check tsis tuaj yeem ntes ob-ntsis yuam kev, txawm hais tias qhov tshwm sim ntawm ob-ntsis yuam kev yog tsawg.
ECC (Kev kuaj xyuas thiab kho) lub cim xeeb, ntawm qhov tod tes, khaws cov lej encrypted nrog rau cov khoom siv. Thaum cov ntaub ntawv sau rau hauv lub cim xeeb, qhov sib thooj ECC code tau txais kev cawmdim. Thaum nyeem ntawv rov qab cov ntaub ntawv khaws tseg, ECC code tau txais kev cawmdim yog muab piv nrog ECC code uas tau tsim tawm tshiab. Yog tias lawv tsis sib xws, cov lej raug txiav txim siab los txheeb xyuas qhov tsis raug hauv cov ntaub ntawv. Cov me ntsis yuam kev yog muab pov tseg, thiab lub cim xeeb tswj tso tawm cov ntaub ntawv raug. Cov ntaub ntawv kho yog tsis tshua sau rov qab rau hauv lub cim xeeb. Yog tias tib cov ntaub ntawv yuam kev raug nyeem dua, cov txheej txheem kho rov qab ua dua. Rov sau cov ntaub ntawv tuaj yeem qhia txog nyiaj siv ua haujlwm, ua rau pom kev poob qis. Txawm li cas los xij, ECC lub cim xeeb yog qhov tseem ceeb rau cov servers thiab cov ntawv thov zoo sib xws, vim nws muaj peev xwm kho qhov yuam kev. ECC nco yog kim dua li niaj zaus nco vim nws cov yam ntxwv ntxiv.
Kev siv ECC lub cim xeeb tuaj yeem muaj kev cuam tshuam loj rau kev ua haujlwm ntawm lub cev. Txawm hais tias nws yuav txo qis kev ua tau zoo tag nrho, kev kho qhov yuam kev yog qhov tseem ceeb rau cov ntawv thov tseem ceeb thiab cov servers. Yog li ntawd, ECC nco yog ib qho kev xaiv nyob rau hauv ib puag ncig uas cov ntaub ntawv ncaj ncees thiab kev ruaj ntseg yog qhov tseem ceeb.
Post lub sij hawm: Lub Xya hli ntuj-19-2023
