Patent ID: 8060711
Filing Date: 2011-11-15
Classification: G06F

Abstract:
1. A storage system coupled to one or more computers, comprising: a storage device for providing a storage area for data; and a controller for controlling data to be written to and read from the storage area, wherein the controller is configured to: store first data in a first location within the storage area upon reception of a storage request for the first data with a first file identifier for a first file being specified; hold information for associating the first file identifier, the first location, a retention period of the data, and predetermined first application version information with one another, the predetermined first application version information indicating a predetermined first application version with which the first data is compatible; store second data in a second location within the storage area upon reception of a storage request for the second data with the first file identifier and second application version information being specified, the second data being derived from the first data to be compatible with a second application version indicated by the second application version information; hold information for associating the first file identifier, the second location, and the second application version information with one another; inhibit the first data from being changed before elapse of the retention period of the data; and inhibit the second data stored in the second location associated with the first file identifier from being changed before the elapse of the retention period of the data.