Patent ID: 7069379

Claim:
An information recording system, comprising: a primary storage unit; a secondary storage unit; and a control unit coupled to the primary storage unit and the secondary storage unit, wherein the control unit is configured to perform operations for recording information, the operations comprising: receiving a write request and information including record information and write control information; detecting a next write position in the primary storage unit, wherein the next write position successively follows the end of previously stored record information and write control information stored in the primary storage unit responsive to a most recent previous write request; writing the received record information and write control information, starting at the next write position, sequentially in consecutive recording areas on a first track on the primary storage unit; writing the received record information and write control information sequentially in consecutive recording areas on a second track adjacent the first track, if all of the received record information and write control information has not been written in the first track and there are no more recording areas on the first track that are available to be written to; reading the received record information and write control information from the primary storage unit; and writing the received record information and write control information in the secondary storage unit in accordance with the received write control information, wherein the operation of writing the received record information and write control information in the secondary storage unit is performed only when no read or write requests are being processed by the primary storage unit.