E whakaahua ana te arowhānui i nga whakaritenga pūkaha, te hiko, me te taumahinga o te pahi.

He SCSI-1, SCSI-2, me SCSI-3.

He rerekē tēnei pahi i ērā atu i tōna nekehangatanga ki ngā pūrere. Nō reira, ka taea te matatini ngā tono i tukuna ki te pūrere, me te pūrere kātahi (tērā pea) te wawahi i a rātou ki ngā subtasks ngāwari ake, ā, he pai ake ki te mahi ki ngā pūnaha mahi pātai maha.

Nō reira he hohoro kē atu tēnei atanga, he whānui ake, he matatini ake hoki i te atanga E-IDE, ko tōna mate matua he whakahono i tētahi ōrautanga nui o te pūtukatuka, arā he hauā meheka he maha ngā roma raraunga e tuwhera ana i te wā kotahi.

Ka taea e te atanga SCSI te whakahaere i ngā momo pūrere ā-roto, waho hoki, pēnei i ngā puku mārō, pūkarapa, pūwera, pūwera, pūrere pūrua, aha atu anō.

Kua whakapūtā te paerewa SCSI-2 e taea ai e te pahi te tūhono i ngā rorohiko ki ngā pūrere pēnei i :

- puku mārō
- ngā pūreretā

Pūreretā ahu-3

Ko te tā Ahu3 he mahi whakanao tāpiri i hangaia mō te tere o te whakatōpū. Ko tana whāinga kia tere, kia ngāwari ai te hanga i tētahi wāhanga kikokiko. Ka taea te whakamahi i ngā rawa rerekē, i te nuinga o te kirihou ABS, te kirihou PLA, me te konganuku, engari me te waxi, me te raima rānei.

- puku kōpae ōmata (WORM)
- puku kōpae ōmata (CD-ROM)
- ngā matawai
- ngā pūrere whakawhitiwhiti

Kāore te paerewa e rāhuitia ai te whakamahinga o te pahi ki te honongatahitanga o tētahi rorohiko ki ngā tāpiritanga, engari ka taea te whakamahi i waenga i ngā rorohiko, te tiri pūrere rānei i waenga i ngā rorohiko.

He tohutohu ake te paerewa SCSI-3.

Ka tautuhia e ngā paerewa SCSI ngā tawhā hiko o ngā atanga I/O. Ko ngā rā paerewa SCSI-1 mai i te 1986, kua whakaritea e ia ngā tono paerewa e taea ai te whakahaere i ngā pūrere SCSI i runga i te pahi karaka i te 4.77 MHz me te whānui o ngā moka 8, nāna i whakaae kia tukua te tere o te raupapa o te 5 MP / s.
Heoi anō, he kōwhiringa te nuinga o ēnei tono, he aha i roto i te 94 i whakaaetia ai te paerewa SCSI-2. He tautuhi i ngā tono 18 e kiia ana ko te CCS (Huinga Tono Pūnoa).

Kua tautuhia ngā momo putanga paerewa SCSI-2 :

- Ko te Whānui SCSI-2 e hāngai ana ki tētahi pahi whānui moka-16 (kaua ko te 8) ā, ka whakaaetia te tuku i tētahi taupatupatu o te 10MB/s;
- He aratau tukutahinga tere te Fast SCSI-2 hei haere mai i te 5 ki te 10 MP / s mō te SCSI arowhānui, mai i te 10 ki te 20 MP / s mō te Wide SCSI-2 (i karangatia mō te take Fast Wide SCSI-2);
- Mā ngā aratau Tere-20 me te Tere-40 e taea ai e koe ēnei tere taurua, whārau hoki.

Kei roto i te arowhānui SCSI-3 ngā mana hōu, ā, ka whakaaetia te mekameka i ngā pūrere 32 me te rerenga mōrahi o te 320 MP/s (ki te aratau Ultra-320).

Ko tā te ripanga e whai ake nei he whakarāpopoto i ngā āhuatanga o ngā paerewa SCSI rerekē :