Storage Device Hardware-Life Estimation With Workload Balancing
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Solution Overview
Problem
Existing storage systems face inefficiencies in managing and optimizing the life and performance of storage devices, particularly in flash-based storage systems, due to unnecessary write operations and lack of centralized control over device management, leading to reduced reliability and increased wear.
Innovation Solution
Implementing a direct-mapped flash storage system where higher-level processes manage data block operations without address translation by storage controllers, utilizing zones and allocation units to optimize wear leveling and reduce redundant writes, and incorporating non-volatile RAM for quick data buffering and power failure protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If storage controllers perform address translation for each data block operation, then data access flexibility is improved, but device complexity and wear increase
Solution Approach 1:
The patent extracts the address translation function from the storage controller and implements it at the host level through software. This removes the burden of address translation from the storage controller, reducing its complexity while maintaining data access flexibility through software-based management of allocation units and zones.
Solution Approach 2:
The patent introduces allocation units as an intermediary layer between the host and physical data blocks. This intermediary abstraction layer allows the host to manage data placement and address translation logically, while the storage controller simply handles physical block operations, reducing controller complexity.
2Ease of operation
If storage controllers manage all data block operations including address translation, then data access control is improved, but unnecessary write operations increase
Solution Approach 1:
The patent implements preliminary action by having the host system pre-plan data placement across multiple allocation units and zones before actual write operations. This allows the system to optimize data distribution and avoid redundant writes by determining the final destination of data blocks before writing, rather than making write decisions during the operation.
Solution Approach 2:
The host system performs self-service by managing its own address translation and data placement logic through software. This eliminates the need for the storage controller to intervene in address translation operations, reducing unnecessary write amplification while maintaining ease of operation through software-based control.
3Device complexity
If flash storage devices operate without centralized management, then device simplicity is improved, but reliability decreases
Solution Approach 1:
The patent segments the storage system into distinct functional layers: the host handles high-level data management and address translation, while the storage controller handles low-level physical block operations. This segmentation allows centralized management of critical functions at the appropriate level, improving reliability without requiring complex management at every layer.
Solution Approach 2:
The patent implements beforehand cushioning through software-based redundancy and error handling mechanisms at the host level. By managing data placement across multiple allocation units and implementing software-level checks before write operations, the system cushions against potential failures while maintaining a relatively simple device structure.
4Speed
If conventional storage systems perform write operations without optimization, then write speed is improved, but device lifespan decreases
Solution Approach 1:
The patent changes the parameters of write operations by introducing allocation units and zones that allow data to be distributed across multiple physical blocks. This enables write optimization techniques such as wear leveling and data placement strategies that extend flash storage lifespan while maintaining acceptable write speeds through efficient data management.
Solution Approach 2:
The patent implements continuity of useful action by maintaining a mapping structure that tracks data locations across allocation units and zones. This continuous tracking allows the system to optimize subsequent write operations by directing them to appropriate zones with available capacity, extending device lifespan without significantly impacting write speed through intelligent data placement.
Data Source
AI summary
Determining remaining hardware life in a storage system, including: receiving data about a plurality of hardware components including data describing the usage of each hardware component and the state of each hardware component; analyzing the data to determine a remaining hardware life for each hardware component in a group of components; and distributing workloads in order to balance wear amongst the hardware components in the group.