Rethinking WOM Codes to Enhance the Lifetime in New SSD Generations
Talkat 12th USENIX Workshop on Hot Topics in Storage and File Systems (HotStorage '20) · 2020-07-13..07-14
summary
Presents a new, simple family of WOM codes designed for multi-level cells and evaluated on QLC drives, implemented with practical storage overheads and simulated on real device parameters; the codes raise total logical writable data between erases from the traditional ~50% ceiling to 50-375% of the physical capacity depending on overhead, and argues an additional boost to up to 500% when leveraging an internal ECC already in SSDs. The design is scalable and shows measurable lifetime gains.
AI-written summary · about