Solid state memory (SSM), computer system including an ssm, and method of operating an ssm

Abstract

In one aspect, data is stored in a solid state memory which includes first and second memory layers. A first assessment is executed to determine whether received data is hot data or cold data. Received data which is assessed as hot data during the first assessment is stored in the first memory layer, and received data which is first assessed as cold data during the first assessment is stored in the second memory layer. Further, a second assessment is executed to determine whether the data stored in the first memory layer is hot data or cold data. Data which is then assessed as cold data during the second assessment is migrated from the first memory layer to the second memory layer.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention generally relates to memory systems, and more particularly, the present invention relates to a solid state memory (SSM), a computer system which includes an SSM, and a method of operating an SSM. Examples of the SSM include the main memory of a computer system and the solid state drive (SSD) of a computer system.[0003]A claim of priority is made to Korean Patent Application No. 2007-0081832, filed Aug. 8, 2007, the entirety of which is incorporated herein by reference.[0004]2. Description of the Related Art[0005]A solid state drive (SSD) is a data storage device that typically emulates a conventional hard disk drive (HDD), thus easily replacing the HDD in most applications. In contrast to the rotating disk medium of an HDD, an SSD utilizes solid state memory to store data. With no moving parts, an SSD largely eliminates seek time, latency and other electro-mechanical delays and failures associated ...

AI Technical Summary

Problems solved by technology

However, flash SSDs generally suffer from relatively slow random write speeds, and this operational drawback is further exasperated with relatively slow speeds of MLC flash.

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