Abstract: A method, apparatus, and article of manufacture for asynchronously writing and reading multiple data streams is disclosed. The method comprises the steps of writing a plurality of data sub-streams into shared memory buffers asynchronously and in parallel using a write process for each data stream, reading the plurality of data sub-streams from the shared memory buffers asynchronously and in parallel using a read process for each data sub-stream, and writing the data sub-stream into the storage device. Data passing between the write processes and the read processes are stored in a plurality of shared memory buffers, with access to the shared memory buffers controlled by semaphores.