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1. (WO2017149592) STORAGE DEVICE

Pub. No.:    WO/2017/149592    International Application No.:    PCT/JP2016/056018
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Mar 01 00:59:59 CET 2016
IPC: G06F 3/06
G06F 12/00
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: TAKAOKA, Nobumitsu
高岡 伸光
YAMAMOTO, Akira
山本 彰
KAWAGUCHI, Tomohiro
川口 智大
WATANABE, Yasuo
渡邊 恭男
YOSHII, Yoshihiro
吉井 義裕
MATSUGAMI, Kazuki
松上 一樹
Title: STORAGE DEVICE
Abstract:
A storage device according to one aspect of the present invention comprises one or more memory devices which are for storing write data for which a write request has been made from a host computer, and a storage controller which provides one or more volumes to the host computer. For each section within the volume, the time at which the most recent write request has been accepted from the host computer is managed. Upon detecting the section for which the write request has not been accepted for a period greater than or equal to a prescribed period from the time at which the latest write request has been accepted, the storage controller carries out a deduplication process.