Disk Drive Reserve Area Expansion via Password-Protected Commands
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Solution Overview
Problem
Current disk drives lack the ability for computer system manufacturers to modify the reserve area, which is critical for storing essential data without risking overwriting or vulnerability to viruses, due to its protection from user access.
Innovation Solution
A method and apparatus that allows computer system manufacturers to expand the reserve area of a disk drive using specific commands enabled by a password, ensuring that critical data remains inaccessible to users and preventing accidental erasure, while allowing additional storage for essential information like virus scans and BIOS portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If critical information is written to a user-accessible area of the disk, then storage cost is reduced, but the critical data becomes vulnerable to overwriting and virus attacks
Solution Approach 1:
The patent segments the disk storage into distinct areas: user-accessible areas and a protected reserve area. By dividing the storage space, critical information can be placed in the reserve area which is inaccessible to users, while maintaining adequate storage capacity in user areas. This segmentation resolves the contradiction by providing both storage capacity and data security through spatial separation.
2Reliability
If the reserve area size is increased to store more critical data, then data security is improved, but user-accessible storage capacity is reduced
Solution Approach 1:
The patent employs parameter changes by dynamically adjusting the boundary between user-accessible areas and the reserve area. Through commands that modify the maximum address or largest track number, the system can flexibly allocate storage space between user and protected areas. This allows optimization of both data security and storage capacity based on specific needs, resolving the contradiction through adjustable parameters.
3Adaptability or versatility
If the reserve area is made accessible to users for modification, then storage versatility is improved, but the risk of accidental erasure of critical data increases
Solution Approach 1:
The patent applies local quality by giving different access permissions to different areas of the disk. The reserve area has restricted access properties (protected from user modification) while user areas have full access permissions. This localized differentiation of access rights allows storage versatility in user areas while maintaining data integrity in the reserve area, resolving the contradiction through spatially varying properties.
Data Source
AI summary
The present invention is directed to a method for allocating resources in a disk drive having a user accessible area, a reserve area, and a boundary between the user accessible area and the reserve area. A capacity of the disk drive accessible to the user is read, the boundary between the user accessible area and the reserve area so as to increase the reserve area, and information is inputted to the increased reserve area.