Dual-Layer Data Protection for Sector Error Correction
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Solution Overview
Problem
Existing computing systems lack effective data protection mechanisms to ensure improved data reliability and recovery, particularly in modern consumer and industrial electronics, where data pervasiveness and commercial pressures necessitate enhanced data protection and recovery solutions.
Innovation Solution
A data protection mechanism is implemented using a data block with data pages and sectors, each containing sector redundancy, applying a first protection across data pages and a second protection across sectors, with iterative RAID-assisted decoding to correct sector errors when initial protections fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single protection layer is applied to data, then the system complexity is low, but data reliability is insufficient
Solution Approach 1:
The data storage structure is segmented into multiple hierarchical levels: data blocks containing multiple data pages, each page containing multiple sectors. Each level applies a different protection mechanism (ECC at sector level, RAID at page level), allowing targeted protection where needed while reducing overall system complexity through modular organization.
Solution Approach 2:
The patent introduces a two-dimensional protection architecture: vertical protection through sector-level ECC codes and horizontal protection through RAID parity distribution across multiple pages. This multi-dimensional approach enhances data reliability without proportionally increasing complexity, as each dimension addresses different failure modes.
2Reliability
If dual-layered protection is applied across data pages and sectors, then data reliability is improved, but computational overhead increases
Solution Approach 1:
The system applies protection selectively rather than uniformly. Sector-level ECC is applied only to individual sectors when needed, while RAID protection operates at the page level. This partial application of protection mechanisms reduces computational overhead compared to applying full protection to every data unit, while still achieving high reliability through the hierarchical structure.
Solution Approach 2:
Parity information is pre-calculated and stored during data writing operations. When data recovery is needed, the preliminary parity information is immediately available without requiring complex real-time computation, thus reducing computational overhead during read and recovery operations.
3Reliability
If iterative RAID-assisted decoding is implemented, then sector error correction is enhanced, but processing time increases
Solution Approach 1:
The iterative RAID-assisted decoding process uses feedback from parity check results to guide subsequent correction steps. The system checks parity conditions, identifies erroneous sectors, applies corrections, and verifies results in iterative cycles. This feedback mechanism enhances correction accuracy while avoiding unnecessary processing by stopping when corrections are confirmed.
Solution Approach 2:
The error correction process is nested in hierarchical levels: inner loop handles sector-level ECC correction, outer loop handles RAID-level parity verification and assistance. This nested structure allows the system to address errors at the appropriate level without unnecessary processing, reducing overall processing time while maintaining enhanced correction capability.
Data Source
AI summary
A computing system includes: a data block including data pages and each of the data pages includes data sectors and each of the data sectors include sector data and a sector redundancy; a storage engine, coupled to the data block, configured to: apply a first protection across the data pages, apply a second protection across the data sectors, and correct at least one of the data sectors when a sector correction with the sector redundancy failed with the first protection and the second protection.