FILE SYSTEM ANALYSIS

Data acquisition results in one or more binary files containing linear bitwise copies of flash memory data. Before any volume analysis and succeed ing file system analysis can take place, the sectors of data as used by the high level file system need to be placed in the right order.

For devices with a flash file system (FFS) this means finding out how the FFS maps physical data to logical data and how the difference between valid and invalid data can be determined. The result of flash file system analysis is a method that splits the physical data into two parts: a file with all logical sectors in the right order belonging to the actual high level file system and a file with all other data not belonging to the (current) high level file system.

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