Would it help if I were to delete the folder with the Nether Dimension from my saved world? I dont really know how far I'd have to go to encounter "new" chunks since I explored the Nether quite a bit. Don't know if this will cause the Nether to properly generate that Iridium
EDIT: On another note: Is there a guide on how to set up Storage discs in a way that makes Netherrack go into its designated disc? I've set aside a few discs with stuff that accumulates in very large numbers (Leaves, Cobblestone, Netherrack, etc...) but I noticed that some of these items always end up on my "non-designated" storages. I end up with a drive that accepts only one type of item but gets none, while the other accepts all kinds of items but
has no more storagespace left due to that one item that should've gone into the drive that was set up*ramblerambleramble*...