Is there a way to tell it to use only certain GPUs? I have a bad card in the machine and I cannot get there now to remove it. EWBF has an option to select which cards to mine. Is there a similar flag to set in this miner to select which cards to mine?
Yes, you can add -devices 0,1,2,4,5 in parameters for example, and in 6-gpu rig it will mine on all cards except one with id=3.