As the topic says,

where can i find the second CF slot for RB 1000u?

You need to open the rackmount case and unscrew the board from it and on the bottom you will see the second CF slot.

You need to open the rackmount case and unscrew the board from it and on the bottom you will see the second CF slot.

ow so the one on the bottom will be permanent?

would it be nice to have an sata/ide converter, so we can have a hdd inside the empty rackmount casing. or make a daughter board for extra ether ports

just an idea ....