Patent ID: 7962531
Filing Date: 2011-06-14
Classification: G06F,Y10S

Abstract:
1. A method for operating a computer data storage system, comprising: maintaining an original active file system having a first hierarchy of files; storing new data of modified files of the original active file system at a selected time to first blocks newly allocated in a data storage device of the computer data storage system; storing pointers to the new data of modified files of the original active file system at the selected time to second blocks newly allocated in the data storage device, the new data and a previously stored old data forming a consistency point of the original active file system at the selected time, the consistency point being a valid image of the active file system stored to the data storage device at the selected time; and severing a previous pointer from the original active file system to the consistency point to form a new active file system having a second hierarchy of files.