@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.
@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 /www.ubuntu. com/download/ alternative- downloads# alternate- ubuntu- server- installer cdimage. ubuntu. com/releases/ 18.04/release/
[2]https:/
[3]http://
From what I understand, those features are coming to the new Subiquity installer eventually.