Abstract: For recording and reproducing data and command logs in peripheral devices of EDP systems (2), for example high-performance electrophotographic printers, a storage device (10) is arranged in the peripheral device (1) and is connected to a central unit (100) of a control device (10) of the peripheral device (1) via a bus system (101). The storage device (3, 104) can be designed here as a microcomputer (3) with internal hard disk store (30), which is connected to the central unit (100) of the peripheral device (1) via a bidirectional parallel interface (103), or as an internal mass store (104) of the peripheral device (1).