A mainly OpenBSD focused collection of how to's.

Change to single partition post install

Posted on: 13 Jan 2024

You can change OpenBSD to run using a single partition after doing a default installation. You might rightly ask why on earth you would want to do this, after all the FAQ “encourages users to split their disk into a number of partitions”. Well it’s great if you have a large disk and in a secure implementation but what if you just want to run on a single partition to make better use of the disk or virtual disk space.

Requirements and disclaimer

Just because it can be done doesn't mean it should be done.


Basic Steps

    cd /home && tar cf – . | (cd /mnt/home && tar xpf – )
    cd /usr && tar cf – . | (cd /mnt/usr && tar xpf – )
    cd /var && tar cf – . | (cd /mnt/var && tar xpf – )
    mount /dev/wd1a /mnt and /dev/wd0a /mnt2
    cd /mnt && tar cf – . | (cd /mnt2 && tar xpf – )