| abstract |
A data storage system comprises a data storage device (2) that comprises a first file system (4) of a first type, wherein at least one file (8) stored in the first file system (4) comprises a second file system (70, 72, 74, 76, 78) of a second, different type; and a file system control means (92) for controlling file system operations performed on the file systems, wherein the file system control means (92) is configured to write data to the second file system (70, 72, 74, 76, 78) in a power-fail-safe manner. |