Memory system and control method

Abstract

Embodiments of the present invention provide a memory system and a control method that can increase the number of write target blocks that can be simultaneously utilized. According to one embodiment,a memory system receives, from a host, a write request including a first identifier associated with one write destination block and storage location information indicating a location in a write bufferon a memory of the host in which first data to be written is stored. When the first data is to be written to a nonvolatile memory, the memory system obtains the first data from the write buffer by transmitting a transfer request including the storage location information to the host, transfers the first data to the nonvolatile memory, and writes the first data to the one write destination block.

Description

[0001] [Related Application Case] [0002] This application enjoys priority based on Japanese Patent Application No. 2017-236269 (application date: December 8, 2017). This application contains all the contents of the basic application by referring to the basic application. Technical field [0003] Embodiments of the present invention relate to a memory system including a nonvolatile memory and a control method thereof. Background technique [0004] In recent years, memory systems equipped with non-volatile memories have become widespread. As one of such memory systems, a solid state drive (SSD) based on NAND flash memory technology is well known. [0005] Even in servers in data centers, SSDs are used as storage devices. [0006] Storage devices used in host computer systems such as servers require high I / O (Input / Output) performance. [0007] Therefore, recently, a new interface between the host and the storage device has been proposed. [0008] In addition, in recent memory devices, ...

AI Technical Summary

Problems solved by technology

[0009]However, when the number of write target blocks that can be used at the same time increases, it is also necessary to increase the number of temporary storages that should be written to each write target block. The number of write buffers required to write data

In general, the capacity of random access memory in a memory device is limited, so it may be difficult for a memory device to prepare a sufficient number of write buffers

Therefore, in practice, the result is that the number of write target blocks that can be used simultaneously is limited

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