Disk Management Device LBA Conversion for Data Recovery
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Solution Overview
Problem
Conventional storage systems face data loss due to inconsistencies in logical block addresses (LBAs) between disk management devices and disk drives, leading to errors in data recovery processes when managing disks with different control units.
Innovation Solution
A disk management method and device that perform error checking, correction, and data loss registration, using a data loss table to recover data by converting between 520-byte and 512-byte block addresses, and simulating pseudo errors to compensate for data losses in a redundant configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data are managed in different control units (520-byte blocks in disk management device, 512-byte blocks in disk drive), then system cost is reduced by utilizing inexpensive disks, but LBA inconsistency occurs causing data loss during error correction
Solution Approach 1:
The patent introduces a control unit converter as an intermediary component between the disk management device and disk drive. This converter translates LBAs from the 520-byte control unit format to the 512-byte control unit format, enabling compatible data management across different control units without requiring expensive unified disk drives while preventing data loss during error correction operations.
2Ease of operation
If error correction is performed using inconsistent LBAs, then data recovery process is simplified, but data loss occurs due to address mismatch between control units
Solution Approach 1:
The patent performs LBA conversion before error correction operations. The control unit converter proactively translates the LBA address from the disk management device's 520-byte format to the disk drive's 512-byte format prior to error correction, ensuring that the error correction process operates with consistent addresses and prevents data loss while maintaining operational simplicity.
Data Source
AI summary
A disk management method for managing a disk management device for writing and reading data to and from a disk drive in which a recording medium is managed in a first control unit. The disk management method includes an error checking operation for checking an error on the recording medium in the first control unit, an error correction operation for correcting the error detected in the error, an error correcting operation for correcting the error detected in the error checking operation after converting data including the error to the second control unit, a data loss registration operation for registering a region in which data are lost due to an inconsistency between the first control unit and second control unit in a data loss region table, and a data loss recovery operation for recovering the loss of data with reference to the data loss region table.