Questions about SCSI

[alternate]

I'm befuzzled about SCSI drives. In particular, 80-pin drives need to be installed onto a backplane that will connect to the SCSI controller via 68-pin cable. Does each hard drive count as a device and need a separate SCSI ID, or does the entire backplane count as one device so that all the drives connected to it share the SCSI ID of the backplane?

Terminators: If you are only using the external bus (port?), then does the internal bus need to be terminated or do some scsi controllers terminate the internal bus automatically?

[Variable]

SCSI controller cards need an ID, they are normally 7. Every hard drive will have an ID number. Terminators are used at the end of a cable. If you don't have a cable plugged in you shouldn't need a terminator.

[Paul Komski]

Just a note in case you are using SAS.

SAS has no termination issues (http://en.wikipedia.org/wiki/Serial_Attached_SCSI) and does not require terminator packs like parallel SCSI