Hard Disk Data Clearing via Target Logic Block Analysis
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Solution Overview
Problem
The existing methods for data clearing in redundant arrays of independent disks (RAID) using a full disk format instruction are inefficient, as they do not effectively remove disk array information, which can affect the usage of the cleared hard disk by other controllers.
Innovation Solution
A method that involves searching for and reading the last target logic block on a hard disk, determining if it contains disk array information, and clearing it using a null character stream file to overwrite the data, thereby breaking the disk array information and improving the effectiveness of data clearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a full disk format instruction is used to clear data, then the hard disk can be normally used without being affected by RAID, but the data clearing effectiveness is low
Solution Approach 1:
The patent segments the data clearing process by identifying and selectively clearing only the last target logic block that contains disk array information, rather than formatting the entire disk. This segmentation approach maintains high clearing effectiveness while improving efficiency by processing only the necessary portion.
Solution Approach 2:
The patent applies local quality by targeting specific regions (the last target logic block containing RAID information) rather than treating the entire disk uniformly. This localized approach ensures complete removal of disk array information while avoiding unnecessary processing of other data areas.
2Adaptability or versatility
If the last target logic block is cleared to remove disk array information, then the hard disk can be used by other controllers, but the process requires precise identification and reading of specific blocks
Solution Approach 1:
The patent performs preliminary actions by reading and analyzing the last target logic block before clearing it. This preliminary identification step ensures that disk array information is accurately detected and confirmed before the clearing operation, making the process reliable despite the complexity of detection.
Solution Approach 2:
The patent employs feedback mechanisms by reading the logic block data, determining whether it contains disk array information, and then proceeding with clearing only if needed. This feedback loop ensures accurate identification and appropriate action, resolving the contradiction between adaptability and detection difficulty.
Data Source
AI summary
A method of data clearing of a hard disk comprises search a last target logic block of a target hard disk according to a predetermined sequence. Stored data in the target logic block is read for determining whether the stored data includes disk array information. The stored data of the target logic block is cleared while the stored data includes the disk array information. By accurately clearing minimum data, a data clearing process of the target hard disk is completed. By comparing with the full disk format manner, an effective of data clearing is improved. An apparatus and a computer readable storage medium applying the method are also disclosed.