Abstract
IBU: An In-Block Update Address Mapping Scheme for Solid-State Drives
Highlights
The use of NAND Flash memory technology in external storage has led to the emergence of solid-state drives (SSDs)
Since the main problem with page address translation is the large size of the mapping table, in the schemes such as DFTL and CDFTL suggest that the address translation operation be based on demand and that the mapping table is stored on the physical pages of flash memory
Among the Flash Translation Layer (FTL) components, the address translation module and the garbage collection module have a significant impact on the performance of flash memories, and much of the previous research has focused on improving these two modules
Summary
The use of NAND Flash memory technology in external storage has led to the emergence of solid-state drives (SSDs). Flash memories have several limitations such as limited lifespan, the inability to overwrite data on pre-written pages, and the asymmetry of read and write operations. To address these limitations, a firmware called the Flash Translation Layer (FTL) is used between the file system and the flash memory. One way to extend the lifespan of flash memory is to distribute write requests evenly across physical blocks These operations are called wear-levelling and impose a high overhead on the SSD [29].
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