July 8, 2019, Update: Recently we have received a lot of questions about Plotter ID, now we provide a Diskcoin PID Generator here: https://diskcoin.org/PidGenerator/ . You can click this link to generate a PID.
After our mainnet online, it may not be compatible with the PID of other wallets. So recommended that you use this tool to generate PID to mine DISC.
If you do not use the PID generated by this tool to plot, you will not be able to multi-mine (mine other PoC coins while mine DISC).
You do realise that people won't mine this if not compatible since their HDDs are already filled with plots for other coins.