Kāore ngā pūnaha rokiroki o ēnei rā e tipu noa i ngā terabits, ā, he nui ake ngā tere whakawhiti raraunga, engari he iti ake te kaha e hiahiatia ana, ā, he iti ake te tapuwae e nohoia ana. Me pai ake hoki te hononga o ēnei pūnaha kia nui ake ai te ngāwari. Me iti ake ngā hononga e hiahiatia ana e ngā kaihoahoa hei whakarato i ngā tere raraunga e hiahiatia ana i tēnei rā, i ngā rā kei te heke mai rānei. Ā, he mea noa mai i te whānautanga ki te whanaketanga, ā, he pakeke haere, ehara i te mahi noa iho. Ina koa i roto i te umanga hangarau mōhiohio, kei te whakapai tonu, kei te whanake haere tonu tētahi hangarau, pērā i te whakaritenga Serial Attached SCSI (SAS). Hei whakakapi mō te SCSI whakarara, kua roa te whakaritenga SAS e noho ana.
I ngā tau kua pahure ake nei, kua whakapaitia ngā whakaritenga o te SAS, ahakoa i mau tonu te kawa matua, kāore i te nui rawa ngā huringa, engari he maha ngā huringa o ngā whakaritenga o te hononga atanga o waho, he whakatikatika tēnei nā te SAS kia urutau ki te taiao mākete, me ēnei "takahanga piki haere ki te mano maero" whakapai tonu, kua pakari haere ngā whakaritenga o te SAS. Ko ngā hononga atanga o ngā whakaritenga rerekē e kiia ana ko te SAS, ā, ko te whakawhiti mai i te whakarara ki te raupapa, mai i te hangarau SCSI whakarara ki te hangarau SCSI hono raupapa (SAS) kua tino whakarerekē i te kaupapa ara taura. Ka taea e te SCSI whakarara o mua te whakahaere i te kotahi-mutunga, i te rerekētanga rānei i runga i te 16 hongere tae atu ki te 320Mb/s. I tēnei wā, ko te atanga SAS3.0 e kitea whānuitia ana i roto i te mara rokiroki umanga kei te whakamahia tonutia i runga i te mākete, engari ko te whānui o te hononga he rua te tere atu i te SAS3 kāore anō kia roa te whakapai ake, arā, ko te 24Gbps, tata ki te 75% o te whānui o te puku totoka PCIe3.0×4 noa. He iti ake te hononga MiniSAS hou kua whakaahuatia i roto i te whakatakotoranga SAS-4, ā, ka taea te whakanui ake i te mātotoru. Ko te hononga Mini-SAS hou he haurua te rahi o te hononga SCSI taketake, ā, 70% te rahi o te hononga SAS. He rerekē ki te taura whakarara SCSI taketake, e whā ngā hongere o te SAS me te Mini SAS. Heoi, i tua atu i te tere teitei ake, te mātotoru teitei ake, me te ngāwari ake, ka piki ake te uaua. Nā te iti o te rahi o te hononga, me aro nui te kaihanga taura taketake, te kaiwhakahui taura, me te kaihoahoa pūnaha ki ngā tawhā pono tohu puta noa i te huihuinga taura.
Kāore e taea e ngā kaiwhakaemi taura katoa te whakarato i ngā tohu tere-teitei kounga teitei hei whakatutuki i ngā hiahia o te pono o ngā tohu o ngā pūnaha rokiroki. Me whai otinga kounga teitei, utu-pai hoki ngā kaiwhakaemi taura mō ngā pūnaha rokiroki hou. Hei whakaputa i ngā huihuinga taura tere-teitei pumau, pakari, me whai whakaaro ki ētahi āhuatanga. Haunga te pupuri i te kounga o te miihini me te tukatuka, me aro nui ngā kaihoahoa ki ngā tawhā pono o ngā tohu e taea ai ngā taura taputapu mahara tere-teitei o ēnei rā.
Whakatakotoranga pono o te tohu (Ko tēhea tohu kua oti?)
Ko ētahi o ngā tawhā matua o te pono o te tohu ko te ngaronga whakaurunga, te whakawhitiwhiti kōrero tata-pito me te tawhiti-pito, te ngaronga whakahoki, te whakapōturitanga o te takirua rerekētanga ā-roto, me te kaha o te aratau rerekētanga ki te aratau noa. Ahakoa e hono tahi ana ēnei āhuatanga, e awe ana hoki tetahi ki tetahi, ka taea e tātou te whakaaro ki tētahi āhuatanga i ia wā hei ako i tōna pānga matua.
Ngaronga whakaurunga (Ngā tawhā auau teitei Ngā Kaupapa Taketake 01- ngā tawhā whakaitiiti)
Ko te ngaronga whakaurunga ko te ngaronga o te kaha o te tohu mai i te pito tuku o te taura ki te pito whiwhi, he rite tonu ki te auau. Ka whakawhirinaki hoki te ngaronga whakaurunga ki te maha o ngā waea, e whakaaturia ana i te hoahoa whakaiti i raro nei. Mō ngā wāhanga ā-roto poto o te taura 30, 28-AWG rānei, me iti iho i te 2dB/m te whakaiti i te 1.5GHz o te taura kounga pai. Mō ngā SAS 6Gb/s o waho e whakamahi ana i ngā taura 10m, e taunakihia ana he taura me te ine raina toharite o te 24, he 13dB anake te whakaiti i te 3GHz. Mena kei te hiahia koe ki te tawhē tohu nui ake i ngā tere raraunga teitei ake, tohua he taura he iti ake te whakaiti i ngā auau teitei mō ngā taura roa ake.
Whakawhitiwhiti Kōrero (Ngā Kaupapa Taketake o ngā Tawhā Auautanga Teitei 03 - Ngā tawhā whakawhitiwhiti kōrero)
Ko te nui o te pūngao e tukuna ana mai i tētahi tohu, i tētahi takirua rerekētanga rānei ki tētahi atu. Mō ngā taura SAS, ki te kore e iti te whakawhitiwhiti tata-mutunga (NEXT), ka puta te nuinga o ngā raruraru hononga. Ka mahia te ine a NEXT i te pito kotahi o te taura, ā, koinei te nui o te pūngao e tukuna ana mai i te takirua tohu tuku putanga ki te takirua whiwhi tāuru. Ka inehia te whakawhitiwhiti tawhiti-mutunga (FEXT) mā te werohanga i tētahi tohu mō te takirua tuku i tetahi pito o te taura, me te tirotiro i te nui o te pūngao e toe ana ki te tohu tuku i tetahi pito o te taura.
Ko te NEXT i roto i te huihuinga taura me te hononga ka puta mai i te koretake o te wehewehe o ngā takirua rerekētanga tohu, ka puta pea i ngā putanga me ngā mono, te koretake o te whenua, te koretake rānei o te whakahaere i te rohe whakamutu taura. Me whakarite e te kaihoahoa pūnaha kua arohia e te kaiwhakahui taura ēnei take e toru.
Ngā kōpiko ngaronga mō ngā taura 100Ω noa o te 24, 26, me te 28
Ko te huihuinga taura kounga pai e ai ki te "SFF-8410-Specification for HSS Copper Testing and Performance Requirements" me iti iho i te 3% te ine i te NEXT. Mō te tawhā-s, me nui ake te NEXT i te 28dB.
Ngaronga Whakahoki (Ngā Kaupapa Taketake o ngā Tawhā Auautanga Teitei 06- Ngaronga Whakahoki)
Ka ine te ngaronga whakahoki i te nui o te pūngao e whakaatahia ana mai i tētahi pūnaha, i tētahi taura rānei ina werohia he tohu. Ka taea e tēnei pūngao whakaata te whakaheke i te kaha o te tohu i te pito whiwhi o te taura, ā, ka raru pea te pono o te tohu i te pito tuku, ka raru pea te pokanoa hikohiko mō ngā kaihoahoa pūnaha me te pūnaha.
Nā ngā rerekētanga o te aukati i roto i te huihuinga taura i puta ai tēnei ngaronga whakahoki. Mā te ata tirotiro i tēnei raruraru anake ka kore e rerekē te aukati o te tohu ina haere mā te putanga hiko, te mono me te pito waea, kia iti ai te huringa aukati. Kua whakahoutia te paerewa SAS-4 o nāianei ki te uara aukati o ±3Ω ki te whakataurite ki te ±10Ω o SAS-2, ā, me pupuri ngā whakaritenga o ngā taura kounga pai i roto i te manawanui ingoa o te 85, 100±3Ω rānei.
Te whakapōturitanga o te piko
I roto i ngā taura SAS, e rua ngā whakapōturitanga piko: i waenganui i ngā takirua rerekētanga me roto i ngā takirua rerekētanga (te tohu rerekētanga o te ariā pono o te tohu). I roto i te ariā, ki te whakaurua he maha ngā tohu ki tētahi pito o te taura, me tae atu rātou ki tētahi pito i te wā kotahi. Ki te kore ēnei tohu e tae mai i te wā kotahi, ka kiia tēnei āhuatanga ko te whakapōturitanga piko o te taura, ko te whakapōturitanga whakaroa-piko rānei. Mō ngā takirua rerekētanga, ko te whakapōturitanga piko i roto i te takirua rerekētanga ko te whakaroa i waenganui i ngā waea e rua o te takirua rerekētanga, ā, ko te whakapōturitanga piko i waenganui i ngā takirua rerekētanga ko te whakaroa i waenganui i ngā huinga takirua rerekētanga e rua. Mā te whakapōturitanga piko nui o te takirua rerekētanga ka kino ake te taurite rerekētanga o te tohu tuku, ka whakaiti i te kaha o te tohu, ka whakanui ake i te wiri wā, ā, ka puta he raruraru pokanoa hikohiko. Me iti iho i te 10ps te rerekētanga o tētahi taura kounga pai ki te whakapōturitanga piko o roto.
Wā tuku: Whiringa-ā-rangi 30-2023
