Shingled Magnetic Recording Sub-Track Configuration
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Solution Overview
Problem
Current magnetic recording and reproducing devices face challenges in achieving high density recording while maintaining random overwriting capabilities, as existing methods often compromise on recording density or allow for only single-direction recording.
Innovation Solution
The proposed solution involves a magnetic recording and reproducing device with a specific track configuration, including sub-tracks of varying widths, where information is recorded and reproduced using shingled magnetic recording techniques, allowing for overlapping regions to increase recording density and enable random overwriting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If shingled magnetic recording is used to increase recording density, then recording density is improved, but random overwriting capability deteriorates
Solution Approach 1:
The magnetic recording medium is divided into multiple sub-tracks (first sub-track, second sub-track, third sub-track, fourth sub-track) within each track. This segmentation allows independent addressing and writing to specific sub-track regions, enabling random overwriting operations while maintaining high recording density through the shingled configuration where adjacent tracks overlap.
Solution Approach 2:
Different sub-tracks are assigned different width specifications (first sub-track width, second sub-track width, third sub-track width, fourth sub-track width) to optimize local recording characteristics. The varying widths allow certain regions to be optimized for high-density storage while other regions maintain accessibility for overwriting operations.
2Manufacturing precision
If sub-tracks of varying widths are used to optimize recording density, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent employs asymmetric sub-track width design where the first, second, third, and fourth sub-tracks have different widths. This asymmetric configuration optimizes the use of magnetic recording space by varying the recording width across different sub-tracks, achieving higher overall recording density while the systematic arrangement maintains manageable device complexity.
Solution Approach 2:
The patent introduces a width dimension variation across multiple sub-tracks within tracks, transforming the conventional uniform track structure into a multi-dimensional configuration. By varying sub-track widths in the lateral dimension while maintaining longitudinal continuity, the system achieves enhanced recording density without proportionally increasing control complexity.
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 configuration achieves higher recording density and allows for random overwriting, enhancing the device's performance by optimizing the arrangement of sub-tracks and their widths to improve data storage efficiency.
Implementation Method 1
Information is recorded in a magnetic recording medium such as a HDD (Hard Disk Drive), etc., using a magnetic recording head
Implementation Method 2
The reproducing unit reproduces first information recorded in the first track while opposing the first sub-track, the second sub-track, and a first boundary between the first sub-track and the second sub-track
Data Source
AI summary
According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a recording unit and a reproducing unit. The magnetic recording medium includes a first track and a second track, the first track extending in a first direction, the second track extending in the first direction and being arranged with the first track in a second direction intersecting the first direction. The first track includes first and second sub-tracks extending in the first direction. The second track includes third and fourth sub-tracks extending in the first direction. The second sub-track is disposed between the first and fourth sub-tracks. The third sub-track is disposed between the second and fourth sub-tracks. The recording unit records information in the first and second tracks. The reproducing unit reproduces first information recorded in the first track. The reproducing unit reproduces second information recorded in the second track.