For anyone still stuck on this issue, this video helped me immensely: https://www.youtube.com/watch?v=PePFc-eQCsY Of course, the video is for mainly the initialization stages, but I had to also make sure that my disks were setup properly as well for the ISOS Share on unraid (see attached screenshots) That way you will be able to select the ISO from the folder: All of this got me past the, cant see bootable media error people were mentioning above. Hope this helps someone