good example, it's clear now, but i still need to know why?, in the sense why the number are different if you build two plot, maybe because every new plot use different re-allocated sectors?
No, nothing that complicated. The numbers will be different if you run the generate program with different nonce values. It takes the nonce value + your account number (or other unique
static value) and preforms a hash function to generate a result. Say 1234567890+1 = 4367894736 and 123456789+2 = 096789975389. You've now made two plots which have unique "lottery numbers". When the block comes and a winner is chosen to get the reward, your computer will check your plot files and see if either of those numbers match the "winning number" for that round. Got it so far?
Now, if you just COPY the plot file to another hard drive, it will have identical data, as you'd expect from copying it. That's no good cause now you've got the numbers 4367894736, 4367894736, 096789975389 and 096789975389. Duplicates! You've wasted two of your lottery tickets because they are the same numbers - you only have two chances to win even though you have four tickets because there are two of eatch ticket. What you need to do is run the plot program again on the second drive and use
different nonce values - say this time 3 and 4. So 1234567890+3 = 854938394958 and 1234567890+4 = 8967565843.
Now you still have four numbers but they are 4367894736, 096789975389, 854938394958 and 8967565843. That's four chances to win! Any overlap (duplicates) in the nonce values will result in duplicate tickets, and duplicate tickets do not count.
**This is not what technically, exactly what happens, this is a simplified example for explanations sake.**
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