Workload Amplification Metering in Data Storage Devices

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Solution Overview

Problem

Data storage devices, such as hard disc drives and hybrid drives, face premature failure due to excessive workload beyond their specifications, leading to potential customer dissatisfaction and warranty losses, as they are often used in excess of their terabytes per year workload rating, causing head degradation and drive failures.

Innovation Solution

A data storage device with a controller that monitors and manages workload utilization by tracking host and internal operations, adjusting internal activities, and providing feedback to customers, thereby controlling drive usage based on workload ratings to prevent premature failure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the data storage device operates beyond its workload rating to meet high host data access demands, then productivity is improved, but reliability deteriorates due to head degradation and premature failure

Engineering Contradiction:

Improvedata access throughputVSAvoiddrive lifespan

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements dynamic workload management by adjusting the data storage device's operational state based on real-time monitoring of workload conditions. The controller dynamically transitions between different operating modes (normal operation, workload reduction, or shutdown) to adapt to varying host demands while protecting against excessive workload that would cause head degradation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system continuously monitors workload metrics and provides feedback to the controller, which then adjusts internal operations accordingly. This feedback loop enables the device to self-regulate its workload consumption, reducing operations when thresholds are approached and maintaining reliability while still serving host requests

Inventive Principle:

Principle #23Feedback

2Productivity

If internal device management operations are increased to improve performance, then productivity is improved, but the workload rating is exceeded causing harmful effects

Engineering Contradiction:

Improveinternal operation throughputVSAvoidworkload amplification

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent applies partial action by selectively reducing or suspending certain internal management operations when the cumulative workload approaches the device's rating. Rather than completely disabling all internal operations, the system selectively throttles non-critical background tasks while maintaining essential host data access operations

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system proactively monitors workload accumulation and takes preventive action before the workload rating is exceeded. By detecting approaching thresholds and preemptively reducing internal operations, the system prevents harmful workload amplification before it occurs, rather than reacting after damage has been done

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS11934673B2Workload amplification metering and management

Publication Date: 2024.03.19 SEAGATE TECH LLC

AI summary

A data storage device includes at least one data storage medium. The data storage device also includes a workload rating associated with data access operations carried out on the at least one data storage medium. The data storage device further includes a controller configured to enable performance of the data access operations, and change a rate of consumption of the workload rating by internal device management operations carried out in the data storage device in response to a change in a workload consumed by host commands serviced by the data storage device.