SSD Irradiation Testing for Silent Data Corruption Detection
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Solution Overview
Problem
Existing methods for testing single event effects in solid state drives (SSDs) face challenges such as damage from decapping processes, limited evaluation of multiple devices, and inability to distinguish between correctable and uncorrectable errors, particularly in SSDs with cache designs, under actual working conditions.
Innovation Solution
A method and device for single event effect testing of large capacity SSDs using high-energy particles that perform irradiation testing without decapping, evaluate multiple devices simultaneously, and distinguish between correctable and uncorrectable errors, utilizing a control center and irradiation chamber with specific components for precise testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If decapping is performed to expose chip surface for testing, then single particle irradiation testing can be conducted, but chip packaging is damaged and permanent damage may occur to some chips
Solution Approach 1:
The patent uses laser pulses to simulate high-energy particle irradiation effects without physically exposing the chip surface. The laser creates equivalent damage patterns that copy the effects of actual particle irradiation, allowing testing while maintaining chip packaging integrity
Solution Approach 2:
The patent introduces laser pulses as an intermediary to transfer the testing function from direct particle irradiation to optical simulation. The laser acts as a mediator that can penetrate or interact with the packaging structure without requiring decapping, enabling indirect but effective testing
2Reliability
If pulsed laser is used for single chip irradiation evaluation, then testing can be performed without decapping, but only single chip evaluation is possible and sensitivity of multiple devices cannot be compared
Solution Approach 1:
The patent merges multiple chip testing capabilities into a single irradiation system. By arranging multiple chips in the irradiation field and using synchronized laser pulses, the system can evaluate multiple devices simultaneously, combining the benefits of non-destructive testing with multi-device comparison capability
Solution Approach 2:
The patent creates a universal testing platform that can handle both single chip and multi-chip evaluation scenarios. The system is designed to be adaptable to different testing configurations, making it universally applicable for evaluating sensitivity of various device types under the same irradiation conditions
3Device complexity
If error counting includes only original errors, then testing is simpler, but uncorrectable errors in cached SSDs are not properly evaluated
Solution Approach 1:
The patent segments the error evaluation process into distinct categories: original errors, cached errors, and uncorrectable errors. By separating these error types and implementing specific detection methods for each, the system achieves comprehensive error characterization without overwhelming complexity
Solution Approach 2:
The patent implements feedback mechanisms through verification information and error logging systems that track and differentiate various error types. The system provides continuous feedback on error status, enabling distinction between correctable and uncorrectable errors while maintaining manageable testing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces damage risk, accurately reflects SSD performance under normal conditions, and enhances the evaluation of system-level effects, including uncorrectable errors, improving the reliability and accuracy of SSD testing.
Implementation Method 1
Single event effects (SEE) may cause logical functional abnormalities in storage systems
Implementation Method 2
The internal atomic displacement of materials caused by elastic collisions of high-energy particles is called displacement damage effect (DDE)
Data Source
AI summary
A method and a device for single event effect testing of large capacity solid state drives based on high-energy particles are provided. The testing method includes: performing a solid state drive (SSD) user data preset experiment; performing irradiation testing using the device; detecting errors of single event latch-up and functional interruption under irradiation conditions; performing silent data corruption testing in a post-irradiation phase; recording silent data corruption and stuck bit error data; and performing error characteristics calculation.