Seagate 2160N manual Glossary

24 Medalist Pro 2160N, Rev. B

Glossary

SCSI: Pronounced scuzzy; acronym for small computer system interface, a standard high speed parallel interface defined by the XT3T9.2 committee of the American National Standards Institute (ANSI).

Ultra SCSI: Doubles the bandwidth of Fast SCSI. It provides 8- bit (SCSI narrow) data rates of 20 Mbytes per second and 16-bit SCSI wide data rates of 40 Mbytes per second.

SCSI address: The representation of the SCSI address, refer- ring to one of the signal lines DB (7-0).

Motor start: Enables the drive to wait for a Start/Stop Unit com- mand from the host before starting or stopping the spindle motor.

Parity: A computer error-checking procedure in which the num- ber of 1s must always be the same (even or odd) for each group of bits transmitted without error.

Termination: A method of matching the transmission imped- ance of an electrical bus to eliminate signal reflections from the end of the cable.

Synchronous data: Data sent without a clock pulse (usually in serial mode).

Asynchronous data: Data sent without a clock pulse (usually in parallel mode). Time intervals between transmitted bits may be of unequal length.

Gigabyte: 1,000,000,000 bytes.