Storage device, flash memory controller and control method thereof

Abstract

The invention relates to a storage device, a flash memory and a period control method. The invention relates to a control method applied to a flash memory controller, the flash memory controller is used for accessing a flash memory module, and the control method comprises the following steps: receiving a setting instruction from a main device so as to set at least one part of the flash memory module as a regional namespace; receiving a write instruction from the main device to write data corresponding to a first area into a plurality of blocks in the flash memory module, and the access mode adopted for writing the data of the first area into the plurality of blocks is determined according to each area and the size of each block.

Description

technical field [0001] The present invention relates to flash memory. Background technique [0002] In the non-volatile memory storage device (Non-Volatile Memory express, NVMe) specification, a zoned namespace (zoned namespace) is specified, however, since the above zoned namespace and each of the zones are purely from the perspective of the host device Therefore, the size of each area defined by the host device does not have a fixed relationship with the size of each block in the flash memory module in the storage device. Therefore, when the host device is ready to correspond to the When the data of one area is written into the flash memory module, the flash memory controller will need to create a large number of mapping tables between logical addresses and physical addresses, for example, the mapping of logical addresses and physical addresses is recorded in units of data pages (pages). Therefore, the flash memory controller is burdened with data processing, and it also ...

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Problems solved by technology

[0002] In the non-volatile memory storage device (Non-Volatile Memory express, NVMe) specification, a zoned namespace (zoned namespace) is regulated. However, since the above-mentioned zoned namespace and each zone are purely from the perspective of the master device From the point of view, therefore, the size of each area defined by the main device does not have a fixed relationship with the size of each block (block) in the flash memory module in the storage device. Therefore, when the main device is ready to correspond to When data in one area is written into the flash memory module, the flash memory controller will need to create a large number of mapping tables between logical addresses and physical addresses, for example, to record the mapping between logical addresses and physical addresses in units of data pages. relationship, thus causing a burden on the flash memory controller for data processing, and also occupying the static random access memory (Static Random Access Memory, SRAM) and / or dynamic random access memory (Dynamic Random Access Memory, DRAM) storage space

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