Memory system with mixed density and control method thereof

Abstract

The invention relates to a control method of a memory system with mixed density, which is suitable for processing data between a host and the memory system, wherein, the host is provided with a memory space with a plurality of logical sections to access data; the memory system is provided with a high-density memory and a low-density memory; and the high-density memory is provided with the memory space with a plurality of physical sections to access data. The control method comprises the following steps: firstly, providing a low-density memory distribution list at the preset position in the memory system to record the configuration information of the memory space of the low-density memory; and finally writing data into the high-density memory or the low-density memory according to the properties of the data and the content of the low-density memory distribution list.

Description

technical field [0001] The present invention relates to a storage device, in particular to a hybrid density memory system (Hybriddensity memory system) and a control method thereof. Background technique [0002] Non-volatile memory (Non-volatile memory, or non-volatile memory) is used to store data. Taking flash memory as an example, it is often used in storage devices, such as memory cards, USB flash drives, and solid-state disk drives. wait. [0003] see figure 1 , which is a schematic diagram of a system structure of a specific embodiment of an existing storage system. like figure 1 As shown, the storage system 13 can be coupled to a host 11 so that data can be accessed between the host 11 and the storage system 13 . Wherein, in the host computer 11, the logical address is used to represent the data storage location, while in the storage system 13, the data storage location is represented by the physical address. The storage system 13 includes a storage module 131 an...

AI Technical Summary

Problems solved by technology

[0007] As mentioned above, although the concept of segmenting reduces the number of memory units to be converted, it also avoids providing a large-capacity storage space to store the logical / physical address mapping table. However, there is no support for the current high-density memory and A Method for Proposing Configuration Data in Hybrid Storage System Structure of Low Density Memory

Because the high-density memory and the low-density memory have different erasing endurance times, if the data is only arbitrarily allocated in the two density memories, it is easy to cause the erasure times of the two memories to be uneven. The memory of one density reaches the limit of erasing durability first, but the memory of another density can continue to be used, and the service life of the storage device ends prematurely

Images