Title:
A storage system and a storage controller
Document Type and Number:
Japanese Patent JP5933755
Kind Code:
B2
Abstract:
A storage system has a RAID group configured by storage media, a system controller with a processor, a buffer memory coupled to storage devices and the processor by a communication network, and a cache memory coupled to the processor and the buffer memory by the network. A processor that stores first data, which is related to a write request from a host computer, in a cache memory, specifies a first storage device for storing data before update, which is data obtained before updating the first data, and transfers the first data to the specified first storage device. A first device controller transmits the first data and second data based on the data before update, from the first storage device to the system controller. The processor stores the second data in the buffer memory, specifies a second storage device, and transfers the stored second data to the specified second storage device.
Inventors:
Tomohiro Yoshihara
Application Number:
JP2014551867A
Publication Date:
June 15, 2016
Filing Date:
April 27, 2012
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G06F3/06
Domestic Patent References:
| JP9282238A | ||||
| JP6119126A | ||||
| JP9231015A | ||||
| JP2008102819A | ||||
| JP2006252414A | ||||
| JP7261946A |
Attorney, Agent or Firm:
Patent Business Corporation Daiichi International Patent Office