Presentation
CellRejuvo: Rescuing the Aging of 3D NAND Flash Cells with Dense-Sparse Cell Reprogramming
Description3D NAND flash memory is one of the most important storage technologies in modern computer systems because of its non-volatile nature and excellent data access performance. However, it suffers from aging and reliability issues due to its inherent property. In contrast to the previous research that tried to recover the data with additional encoding techniques, we propose a novel reprogramming technique, called CellRejuvo, to improve the reliability of NAND Flash cells. To the best of our knowledge, CellRejuvo is the first data recovery technique that reprograms the most error-prone state to extend the SSD lifetime. We implement CellRejuvo on a 3D NAND flash-based SSD and evaluate its capability on various realistic workloads. The extensive experimental results show that CellRejuvo successfully reduces the error rate of SSD by an average of 38.28% under various retention times.
Event Type
Work-in-Progress Poster
TimeTuesday, June 256:00pm - 7:00pm PDT
LocationLevel 2 Lobby
AI
Autonomous Systems
Cloud
Design
EDA
Embedded Systems
IP
Security