const char *Device_close(struct Device *self);
const char *Device_readSector(const struct Device *self, int track, int sector, char *buf);
const char *Device_writeSector(const struct Device *self, int track, int sector, const char *buf);
const char *Device_close(struct Device *self);
const char *Device_readSector(const struct Device *self, int track, int sector, char *buf);
const char *Device_writeSector(const struct Device *self, int track, int sector, const char *buf);