Flash Memory Error Recovery Manager Switching Online Offline Techniques
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Solution Overview
Problem
Flash memory systems face inefficiencies in error recovery due to reliance on online error recovery techniques that consume resources without ensuring data recovery, especially when read errors occur frequently across multiple blocks.
Innovation Solution
Implementing a system where an error recovery manager uses an error count and block error map to determine when to switch from online error recovery techniques to offline redundancy-based techniques, such as RAID, to conserve resources and improve recovery chances by leveraging redundancy data stored across multiple flash memory circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If online error recovery techniques are used to attempt data recovery, then data recovery attempts are made, but resource consumption increases without ensuring successful recovery
Solution Approach 1:
The error recovery system dynamically switches between online error recovery techniques and offline redundancy-based techniques based on real-time error count and block error map criteria. When read errors occur frequently across multiple blocks, the system transitions from online to offline techniques, making the recovery approach adaptive rather than static.
Solution Approach 2:
The system changes operational parameters by monitoring error counts and block error maps, then switching recovery methodologies based on these parameter thresholds. When error criteria are met, the system changes from using online techniques to using offline redundancy techniques, optimizing resource usage based on actual error conditions.
2Reliability
If online error recovery techniques are continuously applied, then recovery attempts are made, but system efficiency decreases due to unnecessary resource consumption
Solution Approach 1:
Instead of continuously applying online error recovery techniques, the system applies them partially - only when error counts and block error map criteria indicate they are likely to be effective. When criteria are exceeded, the system switches to offline techniques, avoiding excessive resource consumption from ineffective online recovery attempts.
Solution Approach 2:
The system uses feedback from error count monitoring and block error map analysis to determine when to switch between recovery techniques. This feedback mechanism allows the system to adjust its recovery strategy based on actual error patterns, improving efficiency by avoiding unnecessary online recovery attempts when errors indicate a failing circuit.
3Use of energy by moving object
If the system switches to offline redundancy-based techniques, then resource consumption is reduced, but the complexity of error recovery management increases
Solution Approach 1:
The system performs preliminary actions by maintaining error counts and block error maps that track error patterns across flash memory blocks. This preliminary monitoring enables the system to proactively switch to offline redundancy techniques before complete failure occurs, reducing resource consumption while managing complexity through structured error tracking.
Solution Approach 2:
The error count and block error map serve as intermediaries between the flash memory circuit and the error recovery techniques. These intermediaries provide structured information that simplifies the decision-making process for switching between online and offline recovery methods, managing system complexity through organized error information.
Data Source
AI summary
A device that provides error recovery handling includes a processor that is configured to receive an error recovery request including error type information and a page address, where the error type information is mapped to a first error recovery technique. The processor may be configured to determine whether an error count associated with the flash memory circuit satisfies a first criterion and an error map associated with the flash memory circuit satisfies a second criterion, where the error count indicates a number of read errors that have occurred and the error map indicates blocks in which the read errors have occurred. The processor may be configured to utilize a second technique to attempt to recover data when the first and second criterions are satisfied, otherwise utilize the first technique to attempt to recover data, where the second technique is associated with recovering data stored in an offline flash memory circuit.