Host Controlled Background Operation Enablement in Memory Devices
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Solution Overview
Problem
Flash memory devices performing background operations without host knowledge can be interrupted, leading to lost or corrupted data and reduced performance due to host commands or power shutdowns, necessitating restarts of these operations.
Innovation Solution
Implementing host-controlled enablement of automatic background operations in memory devices through registers that allow the host to enable, disable, and schedule these operations, ensuring the memory device performs them during idle times or as instructed by the host, thereby preventing interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the memory device performs background operations automatically without host knowledge, then the memory device can perform wear leveling and housekeeping operations, but the host can interrupt these operations by sending commands or turning off power, resulting in lost or corrupted data and requiring restarts
Solution Approach 1:
The patent implements a feedback mechanism where the memory device checks for host commands or power shutdown conditions during background operations. When such conditions are detected, the device pauses or terminates the background operation and notifies the host, allowing the host to be aware of and coordinate with these operations rather than being surprised by interruptions or data corruption
Solution Approach 2:
The patent applies preliminary action by having the memory device check for potential interruption conditions (host commands, power shutdown signals) before and during background operations. This allows the device to proactively pause or terminate operations before data loss occurs, rather than reacting after corruption has happened
2Extent of automation
If the memory device performs background operations automatically, then wear leveling and housekeeping can occur, but performance is reduced due to interruptions and required restarts of these operations
Solution Approach 1:
The patent makes the background operation execution dynamic by allowing the memory device to adjust its operation based on host activity. The device can pause, resume, or terminate background operations based on real-time conditions, optimizing the balance between performing necessary maintenance tasks and responding to host commands without unnecessary interruptions or restarts
3Ease of operation
If the host sends commands to the memory device, then access operations can be performed, but background operations are interrupted leading to data loss
Solution Approach 1:
The patent introduces an intermediary coordination mechanism between the host and memory device background operations. The memory device acts as an intermediary that monitors both host commands and background operation status, coordinating between these two functions to determine when it is safe to interrupt background operations without causing data loss, rather than allowing direct conflict between host commands and background tasks
Data Source
AI summary
Systems are disclosed. A system may include a memory device and a host in communication with the memory device. The host may be configured to determine a background operation status of the memory device and enable or disable background operations of the memory device based on the background operation status of the memory device. Associated memory devices and methods are also disclosed.