Multi-Pickup Optical Storage Redundant Data Writing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical read/write apparatuses face challenges in quickly and reliably writing data to optical storage media, especially when errors occur or defects are present, as they often require rewinding or re-writing data, which is time-consuming and can disrupt data continuity.
Innovation Solution
The apparatus employs multiple optical pickups arranged to cross tracks on an optical storage medium, allowing for simultaneous writing and verification of data, with a control section that instructs alternative pickups to write data on different tracks if errors or defects are detected, ensuring accurate data storage and quick recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple optical pickups are arranged to cross tracks for parallel read/write operations, then productivity is improved, but device complexity increases
Solution Approach 1:
The optical storage medium is divided into multiple track regions, with each region served by a dedicated optical pickup. This segmentation allows parallel operations across different tracks while keeping each pickup's control relatively simple, resolving the contradiction between improved productivity and increased device complexity.
Solution Approach 2:
Each optical pickup is designed with multi-functionality, capable of performing both write operations and verify operations sequentially. This universal design reduces the need for separate dedicated components, thereby managing device complexity while maintaining high productivity through parallel operations.
2Reliability
If verify operation is performed after write operation, then reliability is improved, but loss of time increases
Solution Approach 1:
The verify operation is performed immediately and continuously during the write operation rather than sequentially after completion. This preliminary action ensures that any writing errors are detected and corrected in real-time, improving reliability while minimizing time loss by eliminating the sequential verification step.
Solution Approach 2:
The optical pickup alternates between write and verify operations in a continuous manner, ensuring that verification is an ongoing process rather than a discrete post-write step. This continuity maintains productive action throughout, improving reliability without significant time penalty.
3Reliability
If data is rewritten on the same track after verification failure, then reliability is improved, but loss of time increases
Solution Approach 1:
When verification failure occurs on a specific track, the system redirects the rewrite operation to a different track dimension rather than re-attempting the same track. This dimensional shift allows parallel processing capabilities to be utilized, improving reliability through redundancy while minimizing time loss by leveraging available parallel optical pickups.
4Productivity
If multiple optical pickups are used for parallel operations, then productivity is improved, but ease of operation deteriorates
Solution Approach 1:
The control unit receives feedback signals from each optical pickup regarding the status of write and verify operations. This feedback mechanism automatically manages the coordination between multiple pickups, simplifying operation complexity while maintaining high productivity through parallel processing.
Solution Approach 2:
Each optical pickup is equipped with autonomous control capabilities, including self-diagnosis and self-adjustment functions. This self-service capability reduces the overall control complexity by distributing intelligence to individual components, allowing the system to manage parallel operations independently.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables rapid and reliable data writing and reading operations by quickly relocating data on optical storage media, minimizing downtime and maintaining data continuity, thus enhancing the efficiency and reliability of bulk data storage systems.
Implementation Method 1
a plurality of optical pickups which are arranged to cross tracks of an optical storage medium and each of which is configured to be able to write data on the optical storage medium
Implementation Method 2
verify the data that has just been written there in parallel
Data Source
AI summary
In one embodiment, the optical read/write apparatus includes a plurality of optical pickups arranged to cross tracks of an optical storage medium and a control section. On finding the data that has been written by any of those optical pickups inaccurate or on detecting any defect at a location where data is going to be written by any of the optical pickups, the control section instructs another one of the optical pickups to write that data on a different track from a track on which the data should have been written.