@Tomasz: The d-i based install image is "the traditional installer found on the alternative downloads page" as you can read from the Download Ubuntu Server 18.04 page[1][2][3]:
Alternative Ubuntu Server installer If you require advanced networking and storage features such as; LVM, RAID, multipath, vlans, bonds, or re-using existing partitions, you will want to continue to use the alternate installer. [1]https://www.ubuntu.com/download/server [2]https://www.ubuntu.com/download/alternative-downloads#alternate-ubuntu-server-installer [3]http://cdimage.ubuntu.com/releases/18.04/release/ >From what I understand, those features are coming to the new Subiquity >installer eventually. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1750645 Title: 18.04 Server installation missing partition options To manage notifications about this bug go to: https://bugs.launchpad.net/subiquity/+bug/1750645/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs