System comprising data storage equipment and method of controlling discard operation

Abstract

A method of controlling discard operations is performed in a system that includes a host device and a data storage device. The method includes providing a shared discard bitmap accessed commonly by the host device and data storage device. The shared discard bitmap includes discard hits in one-to-one correspondence with target sectors of a nonvolatile memory device in the data storage device. The method also includes setting bit values of the discard bits stored in the shared discard bitmap, the bit values indicating whether data stored in each of the target sectors are discardable. An asynchronous discard operation may then be performed with respect to the target sectors based on the bit values of the discard bits stored in the shared discard bitmap.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2018-0165161 filed with the Korean Intellectual Property Office on December 19, 2018, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] Example embodiments relate generally to semiconductor integrated circuits, and more particularly, to systems including data storage devices and methods of controlling discard operations in the systems. Background technique [0004] Data can be stored in a memory device using different types of write operations. Examples include random write operations and sequential write operations. In non-volatile memory devices, the execution of random write operations may be promoted to the execution of sequential write operations under certain circumstances. Additionally, certain administrative functions can be performed to ensure proper operation. [0005] Management funct...

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