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Installation is supported from several media types, including:
CD-ROM
FFS partitions
Tape
Remote NFS partition
FTP
HTTP
dnl XXX uncomment when cd-rom distribution available
dnl If you have the OpenBSD CD-ROM distribution (and a CD-ROM drive), you
dnl may be able boot from it. If you can boot from the CD-ROM,
dnl you are home free and can proceed to the installation steps. If not,
dnl you will need to do some setup work to prepare a bootable image, either
dnl a floppy, hard drive, or compatible net boot server.
dnl
In addition to the bootable image, you also need to consider how to
access the binary distribution sets to actually install the system.
dnl XXX uncomment when cd-rom distribution available
dnl If you have the OpenBSD CD-ROM distribution you can either access the
dnl CD-ROM directly from the bootable image or remotely mounted on another
dnl system via NFS.
dnl
dnl Although you can access the distribution sets directly from the CD-ROM or
dnl from one of the FTP mirrors over the internet, you may wish to transfer
dnl the sets to a local FTP or NFS server, or copy them to a partition on
dnl the target system's disk.
dnl XXX uncomment when floppy available
dnl OpenBSDXferFloppyFromDOS
dnl
dnl OpenBSDXferFloppyFromUnix
dnl
dnl XXX uncomment when floppy or miniroot available
dnl XXX make sure to adapt text, especially examples, if only floppy
dnl XXX or miniroot is available, but not both.
dnl Creating a bootable hard disk using SunOS or other Un*x-like system:
dnl
dnl If you don't have a floppy drive you can copy the floppy
dnl installation image "floppy{:--:}OSrev.fs" or the mini-root "miniroot{:--:}OSrev.fs"
dnl onto the hard disk you intend to boot on. Traditionally, the
dnl way to do this is to use dd(1) to place the bootable filesystem
dnl image in the "swap" partition of the disk (while running in
dnl single user mode), and then booting from that partition.
dnl
dnl Using the "b" partition allows you to boot without overwriting
dnl any useful parts of the disk, you can also use another partition,
dnl but don't used the "a" or "c" partition without understanding
dnl the disklabel issues described below under "incompatible systems".
dnl
dnl This requires that you be running SunOS, Solaris, OpenBSD or NetBSD
dnl which have a compatible view of SunOS disk labels and partitions.
dnl
dnl Use the dd(1) utility to copy the file to the hard drive.
dnl Under SunOS, the command would be:
dnl
dnl dd if=floppy{:--:}OSrev.fs of=/dev/rsd0b bs=36b
dnl - or -
dnl dd if=miniroot{:--:}OSrev.fs of=/dev/rsd0b bs=36b
dnl
dnl The blocksize is arbitrary as long as it's a multiple of 512-bytes
dnl and within the maximum supported by the driver, i.e. bs=126b may
dnl not work for all cases. Again, device/partition names may vary,
dnl depending on the OS involved.
dnl
dnl If you are preparing the hard drive on an incompatible system or
dnl don't care about the hard disk contents, you can also install the
dnl bootable image starting at the beginning of the disk. This lets
dnl you prepare a bootable hard-drive even if don't have a working
dnl operating system on your Sparc, but it important to understand
dnl that the bootable image installed this way includes a "disk label"
dnl which can wipe out any pre-existing disklabels or partitioning for
dnl the drive.
dnl
dnl The floppy image is used only for booting, and can be placed in
dnl a partition that will be overwritten during the install process,
dnl since it actually runs off a ram-disk image in the kernel. In
dnl contrast the miniroot is a normal unix root filesystem and you
dnl must place in a partition that will not be overwritten until you've
dnl completed the installation process.
dnl
dnl To copy the floppy image to the whole disk, overwriting labels:
dnl
dnl dd if=floppy{:--:}OSrev.fs of=/dev/rsdXc bs=36b
dnl
dnl Two notes - X should be replaced by the unit number of the target
dnl disk, which is most likely *not* the disk/partition that's your
dnl current root partition. Again names may vary depending on the
dnl OS involved. Second, after doing this, the disklabel will be one
dnl that would be appropriate for a floppy, i.e. one partition of 2880
dnl block, and you'll probably want to change that later on.
dnl
dnl If you're starting with a virgin disk and trying to do this under
dnl SunOS, use format(8) and newfs(8) to set up the partitions and
dnl mark the intended partition as an normal partition type. If you're
dnl using OpenBSD, perhaps on another architecture, OpenBSD will
dnl create a "fictitious label" that will let you access the whole
dnl disk.
dnl
dnl To copy the floppy image to the hard disk, preserving SunOS,
dnl Solaris, NetBSD or OpenBSD labels:
dnl
dnl dd if=floppy{:--:}OSrev.fs of=/dev/rsdXc bs=1b skip=1 seek=1
dnl
dnl You need to be sure that your version of dd(1) supports the
dnl skip and seek operands, otherwise you can try a technique like:
dnl
dnl dd if=/dev/rsdXc of=/tmp/label bs=1b count=1
dnl dd if=floppy{:--:}OSrev.fs of=/dev/rsdXc bs=36b
dnl dd if=/tmp/label of=/dev/rsdXc bs=1b count=1
dnl
dnl In either case, you've created a situation where the disklabel
dnl and the filesystem information don't agree about the partition
dnl size and geometry, however the results will be usable.
dnl
Creating a network bootable setup using SunOS or other Un*x-like system:
The details of setting up a network bootable environment vary
considerably, depending on the network's host. Extract the
OpenBSD diskless(8) man page from the man{:--:}OSrev.tgz distribution
set or see the copy on the OpenBSD web page. You will also
need to reference the relevant man pages or administrators guide
for the host system.
Basically, you will need to set up reverse-arp (rarpd) and boot
parameter (bootpd) information and make the OpenBSD bootblock,
kernel/miniroot partition, and a swap file available as required
by the netboot setup.
OpenBSDXferPrelude
dnl XXX uncomment when floppy available
dnl The floppy installation allows installing OpenBSD directly from FTP
dnl mirror sites over the internet, however you must consider the speed and
dnl reliability of your internet connection for this option. It may save
dnl much time and frustration to use ftp get/reget to transfer the
dnl distribution sets to a local server or disk and perform the installation
dnl from there, rather than directly from the internet.
dnl
OpenBSDXferBareTape
OpenBSDXferNFS
OpenBSDXferFFS
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