the number of replicas with storage type ram_copies, disc_copies and disc_only_copies respectively. The actual values are dynamically derived from the first fragment. The first fragment serves as a pro-type and when the actual values needs to be computed (e.g. when adding new fragments) they are simply determined by counting the number of each replicas for each storage type. This means, when the functions mnesia:add_table_copy/3, mnesia:del_table_copy/2 andmnesia:change_table_copy_type/2 are applied on the first fragment, it will affect the settings on n_ram_copies, n_disc_copies, and n_disc_only_copies.
