Memory System Write-Temperature Tracking for Reliable Data Recovery
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Solution Overview
Problem
Recovering data from memory systems is challenging when there is a significant temperature difference between the write and read temperatures, leading to increased error rates during data retrieval.
Innovation Solution
A memory system provides write temperature information to a host system, allowing it to adjust the read temperature to be within a threshold range of the write temperature, thereby improving data recovery reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is read from memory system at a temperature significantly different from write temperature, then data recovery can be performed, but error rate increases
Solution Approach 1:
The memory system stores the write temperature information in advance along with the data. When data needs to be recovered, the host system retrieves this pre-stored temperature information and uses it to adjust the read temperature, preventing errors before they occur during the read operation.
Solution Approach 2:
The memory system provides feedback about the write temperature conditions to the host system. The host system then adjusts the read temperature based on this feedback information, creating a closed-loop system that adapts to temperature variations and minimizes read errors.
2Reliability
If write temperature information is stored and provided to host system, then read temperature can be adjusted to improve reliability, but device complexity increases
Solution Approach 1:
The write temperature information is merged with the data storage structure, allowing both data and temperature metadata to be stored together in the memory system. This integration approach avoids adding separate complex temperature tracking mechanisms while still enabling temperature-aware read operations.
Solution Approach 2:
The memory system automatically provides write temperature information to the host system without requiring external intervention or complex temperature monitoring hardware. The system leverages existing temperature sensors and storage mechanisms to achieve temperature-aware operations.
Data Source
AI summary
Methods, systems, and devices for write temperature recovery from a memory system are described. A memory system may receive a command to provide write temperature information associated with data written to the one or more memory devices. The memory system may read, from the one or more memory devices based on the command, a write temperature indicative of a temperature of the memory system at a time of writing a subset of the data. The memory system may read, based on transmitting the write temperature to a host system, one or more subsets of the data.