Patent ID: 7240043
Filing Date: 2007-07-03
Classification: H04L

Abstract:
1. A method of controlling a storage control apparatus connected and capable of communication to a plurality of host computers via communication means, receiving data I/O requests transmitted from the plurality of host computers, and performing a data I/O process corresponding to the requests to a storage device connected to the storage control apparatus, the method comprising steps of: transmitting a notification message notifying a start of a process from the storage control apparatus to the plurality of host computers when the storage control apparatus executes a process required for a control of data I/O requests transmitted from the plurality of host computers; and executing the process by the storage control apparatus after receiving from all of the plurality of host computers reply messages in response to the notification messages, wherein the data I/O request is transmitted to the storage control apparatus in a communication system such that the storage control apparatus has no knowledge of the processing state at which the data I/O request is transmitted from each of the plurality of host computers, wherein the storage control apparatus includes a file system and the data I/O request is a request instructing a data I/O on file basis, and wherein the storage control apparatus identifies completion of the set of I/O requests necessary for an application program on each of the plurality of host computers, in response to the reply message from each of the plurality of host computers.