The --usb command gives you finer control over this. The --device command only takes one set of values now (-d 0-1 instead of -d 0 -d 1) and only works for usb devices since version 3.2.1, and it is a coarse command.
I went ahead and tried it now.
"--usb 5:1,5:2" in one instance
"--usb 3:1,3:2" in the other instance
Both hashing away just fine. Now I can more objectively compare pools.
Thanks,
Sam
Is that all that is necessary to run multiple instances or is there other "secret sauce"? What do the number mean?