Page Mapping

Page mapping is an advanced flash management technology and can be considered the ideal solution for industrial applications to increase random access speed and improve SSD lifespan, reduce block erase frequency, and achieve optimized performance.

With the architectural framework for the Internet of Things (IoT) getting gradually mature, portal websites, compact PCs, medical care and vehicular devices have become the focus of future development in the industrial automation market. The mass adoption and diverse applications of SSD in the industrial automation market mean that critical SSD technology must continuously evolve to solve system application problems. In particular, FTL (Flash Transfer Layer) mapping in SSD firmware is the most crucial as it determines SSD performance and lifespan. From block mapping in the early days to hybrid mapping, the technology of mapping has continuously improved performance and lifespan but it is still unable to overcome a few extreme usages in industrial applications. To achieve a complete overhaul and comply with industrial applications, new innovative page mapping will gradually dominate SSD applications.

Page mapping is an advanced flash management technology whose essence lies in the ability to gather data, distribute the data into flash pages automatically, and then schedule the data to be evenly written. Thus, page mapping is adopted to increase random access speed and improve SSD lifespan, reducing block erase frequency, and achieving optimized performance and lifespan.

Given that the data written to flash memory from industrial applications is often small and random, page mapping appears to be the ideal solution to increase overall performance and endurance, even though it requires a large mapping memory to maintain its mapping table. Equipped with the evolved page mapping firmware technology, Apacer SATAIII SSD, Industrial SD R1 and microSD R1 products are mainly designed for intensive, small and random data writes in end applications, including POS system, compact PCs, community websites, portal websites and medical diagnostic equipments.

FTL Structure Memory Requirement Random Write Performance Sequential Write Performance
Page Mapping Large High Low
Block Mapping Small Low High
Hybrid Mapping Medium Medium Medium