I have around 10 mining rigs ready to mine ZCash, but Im not sure if every single mining rig have to run zcashd program?
Or if its necessary at all? I already have created t and z addresses on separated machine.
And second question - how can I backup everything about zcash especially the t and z addresses with keys etc. to be sure when I lose that machine, I will be able to recover my addresses and do not lose my coins.