Custom OpenBSD 4.3 bootable CD

Strat from the release of OpenBSD 4.2, you will find that cdrom42.fs was not provided in OpenBSD official ftp sites. however, it is relatively easy to custom build your OpenBSD bootable installer CD. I will show you the steps in making your own OpenBSD bootable CD.

Create download directory.
shell> mkdir -p /OpenBSD

Download OPENBSD Files
shell> wget ftp://ftp.openbsd.org/pub/OpenBSD/4.3/i386/*

if the download is disconnected suddenly due to the Internet connection problem. You can resume it by
shell> wget -c ftp://ftp.openbsd.org/pub/OpenBSD/4.3/i386/*


Create Cdrom43.fs
A PERL module, call "geteltorito" need to use for grab a copy/make executable and extract boot image from the file cdemu43.iso with simple command.

shell > geteltorito cdemu43.iso > cdrom43.fs
Booting catalog starts at sector:29
Manufacturer of CD: Copyright (c) 2007 Theo
Image architecture: x86
Boot Media type is: 2.88meg floppy
E1 Torito image starts at sector 30 and has 5760 sector(s) of 512 Bytes
Image has been written to stdout.........

To Create Boot Image
shell> mkyhybrid -r -b cdrom43.fs -c "boot.catalog" -o OpenBSD43.iso OpenBSD

By now, you should already have the OpenBSD43.iso and you can burn it to CD using any kind of operating system.

After finished, you can create the bootable iso image: