3.1. Glossary
External configuration - all SCSI peripheral devices are external to the host enclosure.
Host - A personal computer system that contains a host adapter and zero or more SCSI peripheral devices.
Host adapter - either an embedded or add-in SCSI device that acts as an initiator.
Internal configuration - all SCSI peripheral devices are internal to the host enclosure.
Legacy SCSI device - an SCSI device implemented prior to this specification that does not conform to PnP SCSI.
Mixed configuration - a combination of internal and external SCSI peripheral devices.
SCSI peripheral device - an SCSI device other than a host adapter that does not include an enclosure, power supply, or external connector.
Peripheral subsystem - an enclosure that contains one or more SCSI peripheral devices.
Internal terminator - the terminator that exists within the host that terminates the internal end of the SCSI bus.
External terminator - the terminator that exists on the last peripheral subsystem that terminates the external end of the SCSI bus.
Exit-point terminator - a terminator that may be enabled or disabled which exists at the 50-position high-density connector on hosts that support a mixed configuration.