- noun an IC or set of circuits used to translate a request for data by the CPU into control signals for the disk drive, including motor control and access arm movement
- A chip, along with the associated circuitry, which enables a computer to control a disk drive. A disk controller handles tasks such as positioning the read/write heads, and the transfer of data. It can be incorporated into the drive, built into the motherboard, or may be in the form of an expansion card. Each interface, such as SCSI or IDE, requires a different type of controller.