NetBSD is an OS that I installed only a couple of times over the years, so I’m not very familiar with its installer, sysinst. Language selectionThe same is true for the main menu …Sysinst main menu… and the information screen about the installation procedure. RAID partition created on the first driveI did the same thing for the second drive and as expected, dk1 appeared. Second RAID partition createdThe next step is to select “Create Software RAID”, which opens a window with configuration options. Accepting the partitioning returns you to the extended partition menu from where you could just choose to edit it again.