Masisitimu emazuva ano ekuchengetera haangokuri pamateru uye ane huwandu hwepamusoro hwekufambisa data, asi zvakare inoda simba shoma uye kutora diki tsoka.Aya masisitimu anodawo zvirinani kubatana kuti ape zvakanyanya kuchinjika.Vagadziri vanoda madiki ekubatanidza kuti vape iyo data data inodiwa nhasi kana mune ramangwana.Uye tsika kubva pakuzvarwa kusvika pakukura uye zvishoma nezvishoma kukura kuri kure nebasa rezuva.Kunyanya muIndasitiri yeIT, chero tekinoroji inogara ichivandudza uye ichizvishandura pachayo, sezvakaita Serial Attached SCSI (SAS) yakatarwa.Semunhu anotsiva kuenderana neSCSI, iyo SAS yakatarwa yanga iripo kwenguva yakati.
Mumakore ayo SAS yakapfuura, mataurirwo ayo akavandudzwa, kunyangwe iyo yepasi pasi protocol yakachengetwa, zvakanyanya hapana shanduko yakawandisa, asi iyo yekunze interface yekubatanidza yakachinja kwakawanda, inova gadziriso yakaitwa na. SAS kuti ienderane nemamiriro emusika, neaya "matanho ekuwedzera kusvika churu mamaira" inoenderera mberi nekuvandudza, SAS zvirevo zvave kuwedzera kukura.Iyo interface yekubatanidza yeakasiyana maratidziro anonzi SAS, uye shanduko kubva paparallel kuenda kune serial, kubva parallel SCSI tekinoroji kuenda kune serial yakabatana SCSI (SAS) tekinoroji yachinja zvakanyanya tambo yekufambisa chirongwa.Yakapfuura yakafanana SCSI inogona kushanda-yakapera kana mutsauko pamusoro pematanho gumi nematanhatu kusvika ku320Mb/s.Parizvino, iyo SAS3.0 interface iyo inonyanya kuwanda mundima yekuchengetedza bhizinesi ichiri kushandiswa pamusika, asi bandwidth inokurumidza kaviri seSAS3 iyo isina kukwidziridzwa kwenguva yakareba, inova 24Gbps, inenge 75. % ye bandwidth yeyakajairika PCIe3.0 × 4 solid-state drive.Iyo yazvino MiniSAS yekubatanidza inotsanangurwa mune iyo SAS-4 yakatarwa idiki uye inobvumira yakakwirira density.Iyo yazvino Mini-SAS yekubatanidza ihafu saizi yeiyo yekutanga SCSI yekubatanidza uye 70% saizi yeSAS yekubatanidza.Kusiyana neyekutanga SCSI parallel tambo, ese SAS uye Mini SAS ane mana chiteshi.Zvisinei, kunze kwekumhanya kwepamusoro, kukwirira kwepamusoro, uye kuwedzera kushanduka, kunewo kuwedzera kwekuoma.Nekuda kwehukuru hudiki hwekubatanidza, iyo yekutanga tambo inogadzira, tambo assembler, uye system dhizaini inofanirwa kunyatso tarisisa kune chiratidzo chekuvimbika paramita mukati megungano retambo.
Havasi vese vanounganidza tambo vanokwanisa kupa emhando yepamusoro-yepamusoro-yekumhanya masaini kuti asangane nechiratidzo chekuvimbika zvinodiwa zvekuchengetedza masisitimu.Cable assemblers inoda mhando yepamusoro uye inodhura-inoshanda mhinduro kune ichangoburwa yekuchengetedza masisitimu.Kuti ugadzire magungano akagadzikana, akasimba-anomhanya-mhanya, zvinhu zvakati wandei zvinofanirwa kutariswa.Pamusoro pekuchengetedza mhando yekugadzira uye kugadzirisa, vagadziri vanofanirwa kunyatso tarisisa kune chiratidzo chekuvimbika ma paramita anoita kuti nhasi-yepamusoro-yekumhanya ndangariro mudziyo tambo dzigoneke.
Chiratidzo chekuvimbika (Chii chiratidzo chakakwana?)
Zvimwe zvezvimiro zvechiratidzo chekutendeseka zvinosanganisira kurasikirwa kwekuisa, pedyo-kumagumo uye kure-kumagumo crosstalk, kudzoka kurasikirwa, skew kukanganisa kwekusiyana kwepakati mukati, uye amplitude yemusiyano mode kune yakajairika mode.Kunyangwe zvinhu izvi zvakabatana uye zvichipesvedzerana, tinogona kufunga chinhu chimwe panguva kuti tidzidze maitiro ayo makuru.
Kurasikirwa kwekupinza (Yakakwira frequency parameters Basics 01- attenuation paramita)
Kurasikirwa kwekuisa ndiko kurasikirwa kwechiratidzo amplitude kubva kumagumo ekutumira kwetambo kusvika kumagumo ekugamuchira, ayo anoenderana zvakananga kune frequency.Iko kurasikirwa kwekuisa zvakare kunoenderana nenhamba yewaya, sezvakaratidzwa mumufananidzo wekudzivirira pazasi.Kune zvipfupi zvemukati zvemukati zve30 kana 28-AWG tambo, yakanaka mhando tambo inofanirwa kuve isingasviki 2dB/m attenuation pa1.5GHz.Kune ekunze 6Gb/s SAS uchishandisa tambo gumi, tambo ine avhareji mutsara geji yemakumi maviri nemana inokurudzirwa, iyo ine chete 13dB attenuation pa3GHz.Kana iwe uchida mamwe masaini magineti pamazinga e data akakwira, tsanangura tambo ine kushomeka kwekudzikisira pama frequency akakwira kune tambo refu.
Crosstalk (High Frequency Parameters Basics 03- Crosstalk parameters)
Huwandu hwesimba rinofambiswa kubva kune imwe chiratidzo kana musiyano peya kuenda kune imwe.Kune tambo dzeSAS, kana iyo yepedyo-yekupedzisira crosstalk (NEXT) isiri diki zvakakwana, inokonzeresa matambudziko mazhinji ekubatanidza.Chiyero cheNEXT chinoitwa pamugumo mumwe chete wetambo, uye ihwo huwandu hwesimba rinotamiswa kubva kune inobuda transmission signal pair kuenda kune yekupinza inogamuchira peya.Far-end crosstalk (FEXT) inoyerwa nekubaya chiratidzo cheiyo mbiri yekutumira kune imwe mugumo wetambo uye nekucherechedza kuti ingani simba rinoramba riri pachiratidzo chekufambisa kune imwe mugumo wetambo.
Iyo NEXT mumusangano wetambo uye chinongedzo chinowanzo kukonzerwa nekusarudzika kwakashata kwechiratidzo chekusiyanisa pairi, izvo zvinogona kukonzerwa nezvitoro uye mapulagi, isina kukwana pasi, kana kusabata zvakanaka kwenzvimbo yekumisa tambo.Iyo system yekugadzira inofanirwa kuve nechokwadi chekuti tambo inounganidza yagadzirisa nyaya nhatu idzi.
Kurasika macurves ezvakajairwa 100Ω tambo dze24, 26, uye 28
Yakanaka mhando yekubatanidza tambo zvinoenderana ne "SFF-8410-Specification yeHSS Copper Testing uye Performance Zvinodiwa" yakayerwa NEXT inofanira kunge iri pasi pe3%.Nezve iyo s-parameter ine chekuita, NEXT inofanira kunge yakakura kupfuura 28dB.
Dzokera Kurasika (High Frequency Parameters Basics 06- Kudzorera Kurasika)
Kurasikirwa kwekudzoka kunoyera huwandu hwesimba rinoratidzwa kubva kuhurongwa kana tambo kana chiratidzo chaiswa jekiseni.Iri rinoratidzira simba rinogona kukonzera kudonha kwechiratidzo amplitude painogashira tambo uye inogona kukonzera matambudziko ekutendeseka kwechiratidzo pakupera kwekutumira, izvo zvinogona kukonzera matambudziko ekukanganiswa kwemagetsi kune sisitimu nevagadziri vehurongwa.
Uku kurasikirwa kwekudzoka kunokonzerwa ne impedance mismatches mugungano retambo.Chete nekubata dambudziko iri nekuchenjerera kukuru, iyo impedance yechiratidzo haishanduke kana ichipfuura nepakati socket, plug uye waya terminal, kuitira kuti iyo impedance shanduko ideredzwe.Iyo yazvino SAS-4 chiyero inogadziridzwa kune iyo impedance kukosha kwe ± 3Ω kana ichienzaniswa ne ± 10Ω yeSAS-2, uye zvinodikanwa zvemhando yakanaka tambo zvinofanirwa kuchengetwa mukati mezita rekushivirira kwe85 kana 100±3Ω.
Skew kukanganisa
MuSAS tambo, kune maviri skew kukanganisa: pakati pemisiyano pairi uye mukati memutsauko pairi (musiyano wechiratidzo chechiratidzo chekutendeseka).Muchirevo, kana masaini akawanda akaiswa kune imwe mugumo wetambo, anofanirwa kusvika kune imwe magumo panguva imwe chete.Kana zviratidzo izvi zvisingasviki panguva imwe chete, chiitiko ichi chinonzi skew kukanganisa kwetambo, kana kunonoka-skew kukanganisa.Pamapeya akasiyana, skew kukanganisa mukati memusiyano peya ndiko kunonoka pakati pewaya mbiri dzepayi musiyano, uye kukanganisa kwe skew pakati pemapaya akasiyana ndiko kunonoka pakati pemaseti maviri emhando dzakasiyana.Iyo yakakura skew kukanganisa kweiyo mutsauko vaviri ichawedzera mutsauko chiyero chechiratidzo chinofambiswa, kuderedza chiratidzo cheamplitude, kuwedzera nguva jitter uye kukonzera matambudziko ekukanganiswa kwemagetsi.Musiyano wetambo yemhando yakanaka kune yemukati skew kukanganisa kunofanirwa kunge iri pasi pe10ps
Nguva yekutumira: Nov-30-2023
