Method for measuring performance of a storage device including rotatable media, for storing data to and/or retrieving data from said media via one or more data buffers. The measurement method includes the steps of: specifying one or more access patterns for transferring data to/from the media; and for each access pattern, specifying one or more different required data transfer rates, measuring the actual data transfer time of the storage device for transferring the data according to that access pattern, and determining performance of the storage device in relation to each required data transfer rate based on the actual data transfer time for the data.
A method for dubbing audio on rewritable medium such as a high-density rewritable optical disc (BD-RE) is provided, which is capable of simultaneously recording a main A/V stream and a dubbed audio stream on the recording medium, while automatically and continuously producing and recording real play lists and a virtual play list adapted to control reproduction of the main A/V stream and dubbed audio stream. The user can conveniently manage recording of a dubbed audio stream corresponding to a main A/V stream on the rewritable recording medium.
A method and apparatus is provided which reduces the equipment and time requirements for hard disk drive performance testing during manufacturing. This invention executes self-contained performance testing code that resides within the drive's manufacturing firmware, rather than relying on external testers. The invention involves exercising the drive's enqueue, dequeue, and command execution firmware, as well as the physical process of reading and writing data by simulating the host interface in code. The invention enqueues commands that typify the desired workload, allows a command ordering algorithm to sort the commands for execution, and allows the drive side code to execute the commands just as if an external host interface were attached. The invention is advantageous because the performance testing can be done by only applying power to the drive. The present invention also lends itself to performance tuning that can be done in manufacturing, to reduce drive-to-drive performance variations.
