Storage Device Power Control Command Handling
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Solution Overview
Problem
Current storage device technologies face challenges in optimizing cost, profitability, performance, and efficiency, particularly in managing power consumption and transitioning between different power modes efficiently.
Innovation Solution
The implementation of a system that allows for queued, persistent, and conditional power control commands to be issued from a host to storage devices, enabling dynamic power management by processing power control commands independently of other commands and persisting changes across resets and power cycles, while also modifying power modes based on collected information and user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power control commands are processed sequentially with other commands, then command processing order is maintained, but power control responsiveness and efficiency deteriorate
Solution Approach 1:
The command processing system is segmented into separate handling paths: power control commands are extracted and processed independently through a dedicated power control handler, while other commands continue through the normal processing queue. This segmentation allows power control operations to execute immediately without waiting for sequential processing, improving responsiveness while maintaining overall system throughput.
2Loss of time
If power control commands are processed immediately upon receipt, then power control responsiveness is improved, but command processing order and consistency may deteriorate
Solution Approach 1:
A dedicated power control handler acts as an intermediary component that receives power control commands directly from the host interface and processes them independently. This intermediary ensures that power control operations are handled with priority and immediacy while maintaining proper command tracking and state consistency through the use of command tags and outcome reporting mechanisms.
3Use of energy by moving object
If power modes are changed frequently to meet varying requirements, then power efficiency is improved, but system stability and reliability deteriorate
Solution Approach 1:
The system implements dynamic power mode adjustment capability where the storage device can transition between different operational states (active, idle, standby, sleep) based on real-time host requirements and device state. The power control handler evaluates current operational context and makes intelligent decisions about mode transitions, allowing the system to adapt to varying workloads while maintaining stability through controlled transition timing and state validation.
Data Source
AI summary
In various embodiments and/or usage scenarios, device power control, such as relating to one or more power control commands, requests to transition operation to a specific power mode, and/or device power management commands, is advantageous and improves one or more of: performance, reliability, unit cost, and development cost of one or more devices, such as storage devices (e.g. a Solid-State Disk (SSD)) or systems including same.