Patent ID: 7702861

Claim:
A drive device for a record carrier, said drive device comprising: interface means for providing a first format for inputting or outputting data according to a first file system; and mapping means for mapping said first format to a second format according to a second file system used on said record carrier; wherein said mapping means is adapted to reserve space on the record carrier for an image of said first file system in a logical specification of said second format, and wherein said mapping means is further adapted to split said image of said first file system into different categories based on properties of data structures, and to store said different categories in different files of said second file system; wherein said mapping means is further adapted to mount said second file system on said record carrier and to translate said second file system in a memory unit into equivalent structures of said first file system, and to store static data structures of said first file system in a file on said record carrier and volatile data structures of said first file system in said memory unit; wherein said mapping means is further adapted to shift a location of frequently updated data on said record carrier; and wherein an entry, describing a layout of files on the record carrier in the first file system, is logically mirrored in the second file system, so that two file systems are written for a same data.