Samsung Electronics Co., Ltd.

Hyeongyu Min

Jungmin Seo

Byeonghui Kim

Jooyoung Hwang

Kangho Roh

Kibeen Jung

Seungjun Yang

Jaewoong Kim

An operation method of a storage device includes receiving a first write request; adding the first write request to a first fragment; selecting at least 'n' (e.g., at least two) streams among a plurality of pre-allocated streams when a size of the first fragment, when a size of the first fragment is >=a reference value, based on a cosine similarity between the first fragment and each of the pre-allocated streams; applying input information to a machine learning model to detect a first sequential stream associated with the first fragment from among the at least “n” streams; allocating a stream identifier of the first sequential stream to the first fragment; and storing write data included in the first fragment based on the stream identifier of the first sequential stream. The input information includes statistical information of at least one of the “n” streams and the first fragment.

Storage controller, storage device, and operation method of storage device

A method includes sampling input/output requests from a host to generate sampled input/output requests; classifying the sampled input/output requests into clusters using an unsupervised learning algorithm; determining a hot data range based on a characteristic of the clusters; and incorporating the determined hot data range into a hot data table.

Storage device using unsupervised learning scheme and memory management method thereof

Growing community of inventors

Seoul, South Korea

Hyeongyu Min