A swap bay device for a portable computer with a swap bay has a mode selection switch for selectively setting its operation mode. If the swap bay device is installed in a portable computer supporting one IDE (integrated drive electronics) interface channel, it is set to a slave mode by the mode selection...http://www.google.de/patents/US6654842?utm_source=gb-gplus-sharePatent US6654842 - Swap bay device supporting both master mode and slave mode and portable computer having the same
