Thanks for the reminder on the ssh login. On the RPI2 as well as the Banana pi there seems to be an issue with the boot loader. It will just sit there and do nothing. It appears it sees the card but will not load it. I think the reverse is also true. If ya do up a card for the Banana or the RPI2 they will not boot a reg PI. Not sure why not but it has to do with the boot loader looking in a different spot for whatever it needs to continue on loading.
Oh well, I read about upgrading the Raspian OS (that one Minera runs). You could try to do this:
From your old Raspberry PI with Minera, SSH into and:
sudo apt-get update
sudo apt-get upgrade
After finishing, you should have an SD Card ready for RPI2 too.
Refer here:
http://thepihut.com/blogs/raspberry-pi-tutorials/16982376-updating-raspian-on-your-microsd-for-the-raspberry-pi-2@ammi84 I'm sorry I haven't that kind of devices, perhaps you could try look at github page of the miner fork (search for an issue) or some more specific related forum thread (it's not a Minera problem it's only a cgminer setup)