RAID0 Memory Self-Test Synchronization via Bidirectional Communication
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Solution Overview
Problem
There is a lack of methods for conducting self-tests on individual SSDs when a RAID0 configuration using two SSDs is employed, which hinders comprehensive testing and synchronization of test results between these devices.
Innovation Solution
A memory system with two SSDs connected via a communication line, featuring a testing unit, communication unit, and test result output unit, performs self-tests in synchronization, transmitting and receiving synchronization frames to determine comprehensive test results, allowing for bidirectional communication and output of test results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-test is performed on individual SSDs in RAID0 configuration, then test coverage is improved, but test result synchronization and comprehensive determination become complex
Solution Approach 1:
The patent combines individual SSD self-test results into a unified comprehensive test result determination. The test result output unit aggregates test outcomes from multiple SSDs and produces a single comprehensive test result, simplifying the complexity of handling individual test results while maintaining thorough test coverage across all devices in the RAID0 configuration.
Solution Approach 2:
The communication unit enables bidirectional communication between SSDs to exchange test status and results. This feedback mechanism allows each SSD to share its test progress and outcomes with others, enabling automatic synchronization and comprehensive test result determination without requiring complex external coordination.
2Measurement precision
If comprehensive test result determination is implemented, then test accuracy is improved, but communication overhead between SSDs increases
Solution Approach 1:
The system performs preliminary self-tests on individual SSDs before conducting comprehensive test result determination. This preliminary action allows each SSD to independently assess its own status, reducing the amount of data that needs to be communicated during the comprehensive determination phase and minimizing communication overhead while maintaining test accuracy.
Solution Approach 2:
The testing process is segmented into individual SSD self-test phases and a final comprehensive test result determination phase. This segmentation allows each SSD to perform localized testing independently, reducing unnecessary communication during the testing phase, while the comprehensive determination phase efficiently aggregates results with minimal communication overhead.
Data Source
AI summary
According to one embodiment, two memory systems each including a memory and a controller are connected via a communication line. The controller includes a testing unit that performs a self-test process on the memory, a communication unit that communicates with the counterpart controller, and a status output unit. The communication unit performs a startup synchronization process which is performed before the self-test process and a termination synchronization process which is performed after the self-test process. The testing unit obtains a comprehensive test result from the test results of the two memory systems, and the status output unit of one memory system outputs the comprehensive test result.