Magnetic disk device
The magnetic disk drive addresses wear on the write head by identifying and refreshing deteriorated sectors using a hybrid recording type with shingled recording, improving product life and efficiency.
JP2025124351APending Publication Date: 2025-08-26KK TOSHIBA +1
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Patent Information
- Application Number
- JP2024020342
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-14
- Publication Date
- 2025-08-26
AI Technical Summary
Technical Problem
Existing magnetic disk drives face wear issues on the write head due to increased data writing, which affects the product life and efficiency.
Method used
A magnetic disk drive with a hybrid recording type that includes a determination unit to identify quality-deteriorated sectors, a refresh processing unit to rewrite data, and a write processing unit that uses shingled recording to minimize wear on the write head by refreshing sectors in bands with fewer deteriorated sectors.
Benefits of technology
The solution effectively reduces wear on the write head, prolonging its lifespan and maintaining data recording efficiency by selectively refreshing sectors, thus enhancing the overall performance and durability of the disk drive.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a magnetic disk device capable of suppressing wear of a write head.SOLUTION: A magnetic disk device includes a disk, a write head, a write processing unit that selects a roof shingle recording type and causes the write head to write data to each band BA, a determination unit, and a refresh processing unit. The determination unit determines whether or not there is a quality-degraded recording sector DRSC among all recording sectors RSC in each band BA. When it is determined that a target band TBA includes the quality-degraded recording sector DRSC among the plurality of bands BA, the refresh processing unit refreshes a plurality of target recording sectors TSC. The plurality of target recording sectors TSC include the quality-degraded recording sector DRSC. In the target band TBA, the number of the plurality of target recording sectors TSC is less than a total number of recording sectors RSC.SELECTED DRAWING: Figure 9
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