Patent ID: 6546475
Filing Date: 2003-04-08
Classification: G11B

Abstract:
A disc controller for controlling the operation of a disc drive which reads and writes data from and to a disc, comprising:means for storing data read from the disc and supplied from the disc drive or external data supplied via a bus for write to the disc, in units of a predetermined data amount being a unit in which the data is to be read from or written to the disc; and means for controlling the data read and write from and to the disc; the controlling means intermittently reading the data for supply to the storing means from the disc in units of the predetermined data amount, and intermittently writing to the disc the data supplied from the storing means in units of the predetermined data amount; and while the disc drive is not reading or writing data from or to the disc, the controlling means supplying the data read from the disc and stored in the storing means to the bus in units of the predetermined data amount, and supplying the data for write to the disc from the bus to the storing means in units of the predetermined data amount; such that the transfer of the data read from the disc and stored in the storing means to the bus and the transfer of the data for write to the disc from the bus to the storing means takes place during a period in which the disk drive is between the time when access to a prior unit of predetermined data amount is completed and the time when access to a next unit of predetermined data amount is initiated.