Installation is supported from several media types, including:

	CDROM
	FFS partitions
	HFS partitions (bootloader only, in conjuction with FTP/HTTP/tape)
	Tape
	FTP
	HTTP

Unless the machine already has openbsd installed on it, and
the bootloader can be loaded from local disk the bootloader will
need to be loaded from the network (netboot) but from there
the system can be installed from any of the above.

While an installation floppy is included in the snapshot it is unlikely
that it will be very useful due to lack of floppy drive on the imac
and the reported inability to boot from USB floppies on the supported
version of the hardware.

Obviously, the steps necessary to prepare the distribution sets for
installation or upgrade depend on which installation medium you
choose.  The steps for the various media types are outlined below.

To install or upgrade OpenBSD using a tape, you need to do the
following:

	To install OpenBSD from a tape, you need to make a tape that
	contains the distribution set files, in "tar" format.  If
	you're making the tape on a UN*X-like system, the easiest way
	to do so is probably something like:

		tar cf <tape_device> <dist_directories>

	where "<tape_device>" is the name of the tape device that
	describes the tape drive you're using (possibly /dev/rst0, or
	something similar, but it will vary from system to system.
	(If you can't figure it out, ask your system administrator.)
	In the above example, "<dist_directories>" are the
	distribution sets' directories, for the distribution sets you
	wish to place on the tape.  For instance, to put the "base{:--:}OSrev"
	and "etc{:--:}OSrev" distributions on tape (in order to do the absolute
	minimum installation to a new disk), you would do the
	following:

		cd .../OSREV		# the top of the tree
		cd MACHINE/
		tar cf <tape_device> base{:--:}OSrev etc{:--:}OSrev

	(Note that you still need to fill in "<tape_device>" in the
	example.)

	Once you have the files on the tape, you can proceed to the
	next step in the installation or upgrade process.  If you're
	installing OpenBSD from scratch, go to the section on preparing
	your hard disk, below.  If you're upgrading an existing
	installation, go directly to the section on upgrading.

If you are upgrading OpenBSD, you also have the option of installing
OpenBSD by putting the new distribution sets somewhere in your existing
file system, and using them from there.  To do that, you must do the
following:

	Place the distribution sets you wish to upgrade somewhere in
	your current file system tree.  At a bare minimum, you must
	upgrade the "base" binary distribution, and so must put the
	"base{:--:}OSrev" set somewhere in your file system.  If you wish,
	you can do the other sets, as well, but you should NOT upgrade
	the "etc" distribution; the "etc" distribution contains system
	configuration files that you should review and update by hand.

	Once you have done this, you can proceed to the next step in
	the upgrade process, actually upgrading your system.