SCSI Controller

A SCSI controller (sometimes refered to as SCSI host) is provided in two ways; as circuitry built-in to the main logic board (CPU board) often referred to as an "onboard" interface; or added to a system by way of a card plugged into the system I/O bus.

If you are adding a SCSI controller card to a system you must add a card that corresponds to your type of system I/O bus.

Typically, your sales representative provides you with the right interface card to fit the system I/O bus and the type of interface that the peripheral device requires. Many systems have built-in SCSI support, and you would not need to install any additional cards.

If you do need to install a SCSI controller card, and it is either an SBus card or a PCI card, the card will be logically addressed automatically based on the order and connector that it is plugged in to. See Chapter 5, Setting Up an Option Card" for more information.