Sisitemu yo kubika uyumunsi ntabwo ikura kuri terabits gusa kandi ifite igipimo cyinshi cyo kohereza amakuru, ariko kandi isaba ingufu nke kandi ifata ikirenge gito.Izi sisitemu nazo zikeneye guhuza neza kugirango zitange byinshi byoroshye.Abashushanya bakeneye imiyoboro mito mito kugirango batange igipimo cyamakuru gikenewe uyumunsi cyangwa ejo hazaza.Kandi ihame kuva ukivuka ukageza kumajyambere kandi buhoro buhoro ukuze ni kure yumurimo wumunsi.By'umwihariko mu nganda za IT, ikoranabuhanga iryo ariryo ryose rihora ritera imbere kandi rikitezimbere, kimwe na Serial Attached SCSI (SAS).Nkumusimbura ugereranije na SCSI, ibisobanuro bya SAS bimaze igihe runaka.
Mumyaka SAS yanyuzemo, ibisobanuro byayo byatejwe imbere, nubwo protocole yibanze yagumishijwe, mubyukuri ntamahinduka menshi cyane, ariko ibisobanuro byumuhuza wimbere wimbere byahinduye byinshi, aribyo byahinduwe na SAS kugirango ihuze n'ibidukikije ku isoko, hamwe nizi “ntambwe ziyongera kugera ku bilometero igihumbi” zikomeza gutera imbere, ibisobanuro bya SAS bimaze gukura.Imigaragarire ihuza ibice bitandukanye byitwa SAS, kandi inzibacyuho kuva kuburinganire na serial, kuva tekinoroji ya SCSI ikorana na tekinoroji ihuza SCSI (SAS) yahinduye cyane gahunda yo guhuza umugozi.Ubusanzwe parallel SCSI irashobora gukora imwe-imwe cyangwa itandukanye hejuru yimiyoboro 16 kuri 320Mb / s.Kugeza ubu, interineti ya SAS3.0 ikunze kugaragara mu murima wo kubika imishinga iracyakoreshwa ku isoko, ariko umurongo wihuta wikubye kabiri SAS3 itigeze ivugururwa igihe kinini, ni 24Gbps, hafi 75 % yumurongo wa PCIe3.0 × 4 ikomeye-ya disiki.Ihuza rya MiniSAS iheruka gusobanurwa mubisobanuro bya SAS-4 ni rito kandi ryemerera ubucucike buri hejuru.Mini-SAS iheruka guhuza ni kimwe cya kabiri cyubunini bwambere bwa SCSI ihuza na 70% yubunini bwa SAS.Bitandukanye numugozi wambere wa SCSI ugereranije, SAS na Mini SAS zombi zifite imiyoboro ine.Ariko, usibye umuvuduko mwinshi, ubucucike buri hejuru, hamwe nuburyo bworoshye, hariho no kwiyongera mubibazo.Kubera ubunini buto bwihuza, uwakoze uruganda rwumwimerere, umugozi uteranya insinga, hamwe nuwashushanyije sisitemu agomba kwitondera cyane ibipimo byuburinganire bwibimenyetso mu nteko rusange.
Ntabwo abaterankunga bose bashoboye gutanga ibimenyetso byujuje ubuziranenge byihuta kugirango bihuze ibimenyetso byububiko bwa sisitemu yo kubika.Abaterankunga b'insinga bakeneye ibisubizo byujuje ubuziranenge kandi bidahenze kuri sisitemu yo kubika vuba.Kugirango tubyare umusaruro uhamye, uramba wihuta wihuta, ibintu byinshi bigomba kwitabwaho.Usibye gukomeza ubuziranenge bwimashini nogutunganya, abashushanya bakeneye kwitondera cyane ibipimo byuburinganire bwibimenyetso bituma insinga yibikoresho byihuta byihuta byashoboka.
Ikimenyetso cyerekana ubunyangamugayo (Ni ikihe kimenyetso cyuzuye?)
Bimwe mubyingenzi byingenzi byerekana uburinganire bwibimenyetso birimo kwinjiza igihombo, hafi-iherezo na kure-kurengana, kugaruka gutakaza, kugoreka gutandukanya itandukaniro imbere, hamwe na amplitude yuburyo butandukanye muburyo busanzwe.Nubwo ibi bintu bifitanye isano kandi bigira uruhare runini, turashobora gusuzuma ikintu kimwe icyarimwe kugirango twige ingaruka zacyo nyamukuru.
Gutakaza kwinjiza (Ibipimo byinshyi Byibanze Shingiro 01- ibipimo byerekana)
Igihombo cyo gushiramo ni ugutakaza ibimenyetso amplitude kuva ihererekanyabubasha rya kabili kugera kumpera yakira, ibyo bikaba bihwanye na frequence.Igihombo cyo gushiramo nacyo giterwa numubare winsinga, nkuko bigaragara ku gishushanyo cya attenuation hepfo.Kubice bigufi by'imbere bigize umugozi wa 30 cyangwa 28-AWG, umugozi mwiza ugomba kugira munsi ya 2dB / m kuri 1.5GHz.Kuri 6Gb / s SAS yo hanze ukoresheje insinga 10m, hasabwa umugozi ufite umurongo ugereranije wa 24, ufite 13dB gusa kuri 3GHz.Niba ukeneye ibimenyetso byinshi byerekana ibimenyetso biri hejuru, garagaza umugozi ufite attenensiya nkeya kuri radiyo ndende kuri insinga ndende.
Crosstalk (Ibipimo Byinshi Byibanze Byibanze 03- Ibipimo byambukiranya)
Ingano yingufu zitangwa kuva ikimenyetso kimwe cyangwa itandukaniro kubindi.Kumugozi wa SAS, niba hafi-iherezo ryambukiranya (NEXT) ritari rito bihagije, bizatera ibibazo byinshi byihuza.Ibipimo BIKURIKIRA bikozwe ku mpera imwe gusa ya kabili, kandi ni ingano yingufu zihererekanwa ziva mubisohoka byerekana ibimenyetso byinjira byinjira byombi.Kwambukiranya kure (FEXT) bipimwa no gutera ikimenyetso kubohereza ku mpera imwe ya kabili no kureba ingufu zisigaye ku kimenyetso cyohereza ku rundi ruhande rwa kabel
GIKURIKIRA mu nteko ya kabili hamwe nu muhuza mubisanzwe biterwa no kwigunga nabi kubimenyetso bitandukanye, bishobora guterwa no gusohoka no gucomeka, kubutaka butuzuye, cyangwa gufata nabi agace karangiriraho.Igishushanyo mbonera cya sisitemu gikeneye kwemeza ko inteko ya kabili yakemuye ibyo bibazo bitatu.
Gutakaza umurongo kubisanzwe 100Ω insinga za 24, 26, na 28
Iteraniro ryiza ryujuje ubuziranenge ukurikije "SFF-8410-Ibipimo byo gupima umuringa wa HSS n'ibisabwa" byapimwe GIKURIKIRA bigomba kuba munsi ya 3%.Kubijyanye na s-parameter, NEXT igomba kuba irenze 28dB.
Gutakaza Igihombo (Ibipimo Byinshi Byibanze 06- Gutakaza Igihombo)
Gutakaza igihombo gipima ingano yingufu zigaragara muri sisitemu cyangwa umugozi mugihe ikimenyetso cyatewe.Izi mbaraga zigaragaza zishobora gutera kugabanuka kwa signal amplitude kumpera yakira ya kabili kandi birashobora gutera ibibazo byubusugire bwikimenyetso kumpera yoherejwe, bishobora gutera ibibazo bya electromagnetic yivanga kuri sisitemu nabashushanya sisitemu.
Iki gihombo cyo kugaruka giterwa no kudahuza impedance mugiterane cya kabili.Gusa mugukemura iki kibazo ubyitondeye cyane, impedance yikimenyetso ntishobora guhinduka iyo inyuze muri sock, plug na wire, kugirango impinduka ya impedance igabanuke.Ibipimo bya SAS-4 bigezweho bivugururwa kugeza ku gaciro ka ± 3Ω ugereranije na ± 10Ω ya SAS-2, kandi ibisabwa by’insinga nziza bigomba kubikwa mu kwihanganira izina rya 85 cyangwa 100 ± 3Ω.
Kugoreka
Mu nsinga za SAS, hari ibintu bibiri bigoretse: hagati yo gutandukanya ibice no muburyo butandukanye (ikimenyetso cyerekana itandukaniro ryerekana ibimenyetso byerekana uburinganire).Mubyigisho, niba ibimenyetso byinshi byinjijwe kumpera yumugozi, bigomba kugera kurundi ruhande icyarimwe.Niba ibyo bimenyetso bitageze mugihe kimwe, iki kintu cyitwa kugoreka skew kugoreka umugozi, cyangwa gutinda-skew kugoreka.Kubitandukanyirizo byombi, kugoreka skew imbere itandukaniro ryuburinganire nubukererwe hagati yinsinga zombi zinyuranye, hamwe no kugoreka skew hagati yo gutandukanya ibice byombi ni ugutinda hagati yuburyo bubiri butandukanye.Kugoreka kwinshi gutandukanya itandukaniro byombi bizarushaho gutandukanya itandukaniro ryikimenyetso cyatanzwe, kugabanya ibimenyetso bya amplitude, kongera igihe jitter no gutera ibibazo bya interineti ya electronique.Itandukaniro ryumugozi mwiza wo kugoreka imbere kugomba kuba munsi ya 10ps
Igihe cyo kohereza: Ugushyingo-30-2023