Search International and National Patent Collections

1. (WO2013160958) INFORMATION STORAGE SYSTEM AND METHOD OF CONTROLLING INFORMATION STORAGE SYSTEM

Pub. No.:    WO/2013/160958    International Application No.:    PCT/JP2012/002882
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Fri Apr 27 01:59:59 CEST 2012
IPC: G06F 3/06
Applicants: HITACHI, LTD.
OHIRA, Yoshinori
AKUTSU, Hiroaki
Inventors: OHIRA, Yoshinori
AKUTSU, Hiroaki
Title: INFORMATION STORAGE SYSTEM AND METHOD OF CONTROLLING INFORMATION STORAGE SYSTEM
Abstract:
An example of an information storage system includes physical storage drives for providing real storage areas to a pool which is tiered into tiers different in performance, and a controller. The controller monitors accesses in a first tier in the pool. The controller determines a loaded state of the first tier based on the accesses to the first tier. The controller holds management information relating loads to the first tier to relocation speeds and/or modes of moving data in data relocation between a second tier in the pool and the first tier. The controller determines at least one of a relocation speed and a mode of moving data in data relocation between the second tier and the first tier based on the determined loaded state of the first tier and the management information.