Method and magnetic disk device
By calculating and selecting the sectors with the lowest recording quality in the disk device, setting them to be prohibited from use, and replacing them with sectors at the end of the track, the problem of uneven recording quality under the SMR method is solved, and the overall recording quality and data storage reliability are improved.
CN120690235APending Publication Date: 2025-09-23KK TOSHIBA +1
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Patent Information
- Application Number
- CN202410714423.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-22
- Filing Date
- 2024-06-04
- Publication Date
- 2025-09-23
AI Technical Summary
Technical Problem
When existing magnetic disk devices use the Shingled Magnetic Recording (SMR) method, while the recording density is improved, the recording quality is easily affected by adjacent track erasure (ATE), resulting in uneven recording quality.
Method used
By calculating and selecting the sectors with the lowest recording quality in the disk device, prohibiting their use, allocating logical block addresses (LBAs) to the remaining sectors, and replacing low-quality sectors with sectors at the end of the track, the overall recording quality is improved.
Benefits of technology
The overall recording quality of the magnetic disk device is improved, the problem of uneven recording quality is reduced, and the reliability and stability of data storage are enhanced.
✦ Generated by Eureka AI based on patent content.
Abstract
The embodiment relates to a method and a magnetic disk device. The method comprises the steps of obtaining, calculating, selecting and distributing. The obtaining means obtaining the result of a quality check associated with the recording quality of a first plurality of sectors included in a first storage area of the disk. The calculation is to calculate a first number, which is the number of sectors corresponding to the capacity obtained by subtracting the set capacity from the actual capacity of the first storage region, on the basis of the set capacity of the first storage region and the set value of the recording density of the first storage region. The selection means that a second number of sectors among the plurality of sectors are selected on the basis of the result. The assignment is to assign an address usable by the host to a group of sectors corresponding to the set capacity and not included in the second number of sectors among the plurality of first sectors.
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