hardware system

Drive capable of rewriting CD-RW discs.

Drive capable of recording CD-R discs.

Drive that reads compact discs containing read-only data.

Drive that reads or writes optical discs.

Combined delay for positioning and accessing disk data.

Waiting time for a disk sector to rotate into position.

Time required to position a disk head.

Movement of a hard-drive head to a target track.

Filesystem allocation unit containing multiple sectors.

Corresponding tracks across multiple platter surfaces.