| 摘要 |
A controller has a random write mode and a sequential write mode to which it transitions when receiving a start command. The controller in the sequential write mode identifies a data stream partially formed by a data item through a control command or a logical address. It also prepares free unit areas for respective data streams, and writes data items in successive storage areas in a corresponding unit area in an order identical to addresses of the data items. When the controller receives an end command, it performs end processing on a unit area for a corresponding data stream. The controller in the sequential write mode transitions to the random write mode when completing the end processing to all data streams or detects a random write request.
|
