If fdisk is being invoked, it will start by
displaying the current partitions defined and then allow you
to modify this information, add new partitions, and change
which partition to boot from by default. If you make a mistake,
you will be allowed to repeat this procedure as necessary to
correct this. Note that you should make OpenBSD be the active
partition at least until the install has been completed.
Next the disk label which defines the layout of the OpenBSD
file systems must be set up. The installation script will
invoke an interactive editor allowing you to do this. Note
that partition 'c' inside this disk label should ALWAYS
reflect the entire disk, including any non-OpenBSD portions.
If you are labeling a new disk, you will probably start
out with an 'a' partition that spans the disk. In this
case you should delete 'a' before adding new partitions.
The root file system should be in partition 'a', and swap
is usually in partition 'b'. If you have DOS or Linux
partitions defined on the disk, these will usually show up as
partition 'h', 'i' and so on.
OpenBSD/macppc can share a disk with Mac OS or Mac OS X by using
an HFS partitioned disk. For proper layout, the disk should be
partitioned with Mac OS or Mac OS X first with unused space or a
spare partition where OpenBSD can be installed. No low disk
boundaries exist on macppc. macppc is unable to install the
bootloader into the HFS(+) partition to boot OpenBSD so it is
necessary to copy 'ofwboot' from the installation media into
the first HFS(+) partition using Mac OS or Mac OS X.