Patent ID: 7024531

Claim:
A data backup method for storing data for which a write request has been received to a first system in a directory path designated by the write request and transferring the data to a second system, the method comprising: presetting a directory path for a backup object to be transferred to the second system; storing the data in the directory path for the first system based on the write request; comparing the directory path for the received write request and the directory path for the backup object transferred to the second system with each other, and when the directory paths match each other, transferring the stored data to the second system; when the directory path designated by the write request does not match the directory path for the backup object, determining whether or not the designated directory path matches a preset condition; when the designated directory path matches the preset condition, issuing a request to transfer data in the designated directory path to the second system; and transferring the data to the second system based on the request.