Memory Codeword Layout Across Pages for Better Capacity Use
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Solution Overview
Problem
Existing memory systems face challenges in efficiently utilizing physical pages due to the requirement that codewords, including user data and error data, often exceed the capacity of a single physical page, leading to inefficiencies in data storage and management.
Innovation Solution
The method involves writing a primary codeword across multiple physical pages, with portions of the codeword stored on different pages and blocks, allowing for a secondary codeword to be formed that spans pages, thereby optimizing data distribution and error correction across memory devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If codewords are confined to single physical pages, then error correction and data management are simplified, but memory utilization efficiency deteriorates due to wasted capacity when codeword size does not evenly divide page size
Solution Approach 1:
The patent divides a codeword into multiple segments that can be distributed across multiple physical pages. Instead of confining each codeword to a single page, the system segments codewords and places portions on different pages, thereby utilizing otherwise wasted page capacity while maintaining organized error correction through associated metadata stored on each page.
2Productivity
If codeword size is fixed to match physical page size, then storage efficiency is improved, but flexibility in code rates and error correction capabilities deteriorates
Solution Approach 1:
The patent implements dynamic codeword sizing where codewords can vary in size and span multiple physical pages depending on the required code rate and error correction needs. The system dynamically adjusts codeword boundaries and distributions across pages, allowing flexible adaptation to different storage scenarios while maintaining efficient utilization through metadata tracking of codeword locations and associations.
Data Source
AI summary
The present disclosure includes apparatuses and methods for codewords that span pages of memory. A number of methods include writing a first portion of a primary codeword to a first page in a first block of memory and writing a second portion of the primary codeword to a second page in a second block of memory. The primary codeword can be included in a secondary codeword. The method can include writing a first portion of the secondary codeword in the memory and writing a second portion of the secondary codeword to a different page and block of the memory than the first portion of the secondary codeword.