A method for reorganizing performance quantity data in a segment of a non-volatile memory. The method encompasses the tasks or operations of generating a cohesive data block at an address space of a working memory, of performance quantity data from a first segment of the non-volatile memory and/or from the working memory, and of copying the data block to a predefined address space of the first or a second segment of the non-volatile memory in a block write operation, the performance quantity data of the data block in essence being written to the predefined address space simultaneously in the block write process.