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1. (WO2017037878) STORAGE SYSTEM AND VERIFICATION METHOD

Pub. No.:    WO/2017/037878    International Application No.:    PCT/JP2015/074882
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Sep 02 01:59:59 CEST 2015
IPC: G06F 3/06
G06F 12/00
G06F 12/16
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: YAJIMA, Nobuyuki
矢島 信行
Title: STORAGE SYSTEM AND VERIFICATION METHOD
Abstract:
In the present invention, a main storage device stores write data in a main logic area within a main volume, stores a first journal including the write data in a main journal volume, and reads first data in the main logic area and generates main information including a first code of the first data and a main logic area identifier. The first journal is transferred to an auxiliary journal volume in an auxiliary storage device. The auxiliary storage device restores write data based on the first journal in an auxiliary logic area corresponding to the main logic area, reads second data within the auxiliary logic area, and generates auxiliary information including a second code of the second data and an auxiliary logic area identifier. The main storage device, when receiving a specific request, stores a second journal including the main information in the main journal volume. The second journal is transferred to the auxiliary journal volume. The auxiliary storage device reads the second journal from the auxiliary journal volume in accordance with a sequence number, acquires the main information from the second journal, and compares the main information with the auxiliary information.