Storage Controller Asynchronous Telemetry Data Notification
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Solution Overview
Problem
Storage devices face challenges in retaining telemetry data due to limited internal memory, leading to potential data loss as newer data overwrites older data, which hinders debugging and issue analysis, especially for issues that manifest after long periods.
Innovation Solution
Implementing asynchronous event notifications between the storage device and host device to alert when telemetry data is predicted to be overwritten, allowing the host device to proactively retrieve and store the data externally, thereby maintaining a continuous and larger log of telemetry data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If telemetry data is stored in the internal memory of the storage device, then the data can be retained for later retrieval and analysis, but the limited memory capacity causes older data to be overwritten by newer data, resulting in data loss
Solution Approach 1:
The patent extracts the telemetry data retention function from the storage device's internal memory to an external host device. The storage device generates and stores telemetry data in its internal memory, but the host device periodically retrieves and stores this data externally, effectively removing the memory capacity limitation from the storage device while preventing data loss.
Solution Approach 2:
The host device acts as an intermediary between the storage device's internal memory and the ultimate data archive. It periodically polls the storage device for telemetry data, retrieves it, and stores it externally, mediating the data transfer and enabling long-term retention without requiring the storage device to have large internal memory.
2Reliability
If the storage device continuously monitors and manages telemetry data in its internal memory, then it can detect when data is about to be overwritten, but this requires additional processing overhead and complexity
Solution Approach 1:
The storage device's controller autonomously monitors its own internal telemetry memory, calculates when data will be overwritten based on write rates and memory capacity, and generates notifications to the host device without requiring external intervention or complex coordination protocols.
3Loss of information
If the host device periodically polls the storage device for telemetry data, then it can retrieve and store data externally, but this polling approach may miss data if the interval is too long or cause excessive overhead if the interval is too short
Solution Approach 1:
The storage device's controller actively monitors its internal telemetry memory status and provides feedback to the host device by sending notifications when data is about to be overwritten. This feedback mechanism allows the host device to retrieve data on-demand rather than relying on fixed-interval polling, ensuring data completeness while minimizing retrieval overhead.
Data Source
AI summary
A method is disclosed that includes, generating, by a controller of a storage device, telemetry data associated with the storage device and stored in a memory device of the storage device. The method further includes determining, by the controller, a telemetry data loss warning condition indicating that a portion of the telemetry data is predicted to be overwritten in the memory device by more recent telemetry data. In response to determining the telemetry data loss warning condition, the controller transmits, to a host device, an asynchronous event notification indicating the telemetry data loss warning condition.