Recording Apparatus AU Boundary Control
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Solution Overview
Problem
Recording speed is reduced when data is recorded into a recording medium with multiple partial areas, as existing technologies may perform data recording across AU boundaries, leading to inefficient use of recording units and reduced speed performance.
Innovation Solution
A recording apparatus and method that control data recording by using one partial area as a destination until it is filled, then switching to another, ensuring that the data size in each recording operation does not exceed the remaining size of the partial area, thereby avoiding crossing of AU boundaries and maintaining optimal recording speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data recording is performed across AU boundaries without restriction, then recording flexibility is improved, but recording speed is reduced
Solution Approach 1:
The recording area is divided into multiple Allocation Units (AUs), and the patent applies segmentation by further dividing data into chunks that fit within each AU boundary. The control unit manages multiple write units and selectively records data chunks to specific AUs, ensuring that recording operations are confined within AU boundaries to maintain high-speed performance while preserving flexibility through selective chunk management.
2Productivity
If data size in single recording operation exceeds remaining partial area size, then recording efficiency is improved, but recording speed is reduced due to AU boundary crossing
Solution Approach 1:
The patent applies partial action by recording data chunks that are sized to fit within the remaining space of partial areas without exceeding AU boundaries. The control unit calculates remaining partial area sizes and adjusts data chunk sizes accordingly, performing partial recording operations that stop exactly at AU boundaries rather than attempting to exceed them, thus maintaining high-speed performance.
Solution Approach 2:
The patent changes the parameter of data chunk size dynamically based on the remaining partial area size of each AU. The control unit adjusts recording parameters by selecting appropriate data chunks from multiple write units, modifying the recording operation to match the available space within AU boundaries, thereby optimizing both speed and efficiency.
3Adaptability or versatility
If multiple write units are used with different writing speeds, then adaptability to different data requirements is improved, but device complexity increases
Solution Approach 1:
The control unit is designed with multi-functionality to manage multiple write units with different writing speeds. It universally handles various data types and recording scenarios by selectively assigning data chunks to appropriate write units based on their speed characteristics and the specific recording requirements, thereby achieving adaptability without proportionally increasing overall system complexity.
Data Source
AI summary
There is provided a recording apparatus. A control unit repeatedly executes a recording operation of recording data into a recording medium having a recording area that includes a plurality of partial areas. The control unit performs control so that one partial area included among the plurality of partial areas is used as a recording destination, and when the one partial area is filled with recorded data, another partial area is used as a recording destination. The control unit performs control so that a size of data recorded in a single recording operation does not exceed a remaining size of a partial area that is used as a recording destination in the single recording operation.