Method for improving 3D-flash performance in solid-state disk

Abstract

The invention discloses a method for improving 3D-flash performance in a solid-state disk, which comprises the following steps of: equally dividing a 3D (three-dimensional) flash page into four flashsub-pages, for example, dividing a 16KB flash page into four 4KB sub-pages (similarly dividing flash pages with other data sizes into four sections), and endowing each sub-page with a sub-page number,establishing a mapping table in a memory, a mapping relation of a screwdriver page level is established, combining the effectively modified data parts in the cache pages into a writing request through reasonable operation of combining the effectively modified data parts in the cache pages, and writing the writing request into a flash memory page at a time. Therefore, the write operation frequencyof the flash memory is effectively reduced, the service life of the flash memory is effectively prolonged, the write response time of the solid-state disk is shortened, and the space utilization rateof the flash memory is improved.

Description

technical field [0001] The invention relates to the technical field of solid state disks, in particular to a method for improving the performance of 3D-flash in the solid state disk. Background technique [0002] A solid-state disk is a storage device that uses semiconductor chips to store data. It is mainly composed of peripheral circuits, semiconductor memory chips, controllers, internal caches of solid-state disks, read-only memory (ROM), host interface logic, and corresponding firmware. The ROM is used to store the firmware in the solid-state disk, the internal cache of the solid-state disk is used to smooth the speed difference between the semiconductor memory and the processor, and the controller is responsible for transmitting and processing data between the host computer and the semiconductor memory chip. At present, the semiconductor memory chip in the solid state disk is mainly flash memory. [0003] With the progress of flash memory manufacturing technology, the ...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of people's needs, it is limited by the limited width and length dimensions to accommodate memory cells

The capacity of 2D flash memory has reached the limit of its development, and it is difficult to continue to increase SSD capacity with 2D flash memory

The common situation now is to still maintain the traditional update strategy in the past, but this will inevitably cause unnecessary waste, and at the same time, the service life of the solid-state disk is also very limited

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