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1. (WO2015045149) INFORMATION SYSTEM, HOST SYSTEM, AND METHOD FOR CONTROLLING ACCESS

Pub. No.:    WO/2015/045149    International Application No.:    PCT/JP2013/076526
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Oct 01 01:59:59 CEST 2013
IPC: G06F 13/10
G06F 3/06
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: NISHINO, Ryota
西野 遼太
OOYAMA, Kazuhiro
大山 一浩
KADOIRI, Satoshi
角入 聡
Title: INFORMATION SYSTEM, HOST SYSTEM, AND METHOD FOR CONTROLLING ACCESS
Abstract:
 The present invention has a first storage system (SS) for providing a first storage area (SA), a second SS for providing a second SA that constitutes a pair with the first SA, and first and second host systems (HS) connected to the first and second SS. The present invention also has a first path for connecting the first HS and the first SA, a second path for connecting the first HS and the second SA, a third path for connecting the second HS and the first SA, and a fourth path for connecting the second HS and the second SA. When the first path has a higher priority than the second path following restoring to a state in which a write request (WR) can be transmitted to the first SS, the first SS transmits an RC stop notification to the second SS if the first SA, which is the write destination of the received WR, is the target of a remote data mirroring process (RC). The second SS changes control so as to perform a control for inducing a failure for a WR in which the second SA is specified as the write destination. When there is a failure in the WR in which the second SA is specified as the write destination, the second HS uses the third path, which has a lower priority than the fourth path, to transmit the WR.