Patent ID: 7464233
Filing Date: 2008-12-09
Classification: G06F

Abstract:
1. A data input/output method in an information processing system, wherein the information processing system includes: a first disk controller having a first disk device configured with a first group of logically significant logical volumes for storing data and a first control unit for controlling data update to the first disk device, said first group of logically significant logical volumes are synchronized in an update state to avoid being rendered insignificant; a host computer requesting an input/output of data to and from the first disk device; and a second disk controller having a second disk device configured with a second group of logically significant logical volumes for storing data and a second control unit for controlling a data update to the second disk device, said second group of logically significant logical volumes are synchronized in a remote-copying state to avoid being rendered insignificant; the data input/output method comprising the steps of: sending from the host computer to the first control unit for a process or task of an update request including a plurality of input/output requests each issued in said process or task and attached with information representing a group of update data stored in said first group of logically significant logical volumes, said process or task being a unit of processing by which an application program or system management is executed; sending the update request from the first control unit to the second control unit; and for each of the input/output requests attached with information representing the group of update data, causing the second control unit to temporarily accumulate the update data associated with the update request and, only until a group deregistration request is received, causing the second control unit to store in the second group of logically significant logical volumes all of the update data attached with the information representing the same group of update data.