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The installer will then ask you which directory you placed the installation sets on. Enter the pathname where the sets are stored (or ‘?’) /obsd At this point, the installer will pick up the installation sets, and you can proceed normally. Page 97
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Installing from a Foreign File System Partition OpenBSD can be installed from files on a partition dedicated to another operating system. You could install Windows XP in the first 7GB of your hard drive, download the distribution directory (or desired files thereof) into a directory on your Windows install, and […]

Here, we see that disklabel understands the 1 offset from the Windows partition, and it knows how many 2 sectors are available in the OpenBSD partition. Other than the unusual offset, this looks exactly like creating a root partition in a dedicated OpenBSD system. The rest of the install process is […]

Disklabel on Multiboot Systems When you are only using part of a hard drive for OpenBSD, you need to handle your OpenBSD partitions a little differently. Before you start to divide up your new MBR partition, take a look at the disklabel you’re starting with. > p … […]

Other fdisk Options fdisk has many other options, some of which are not particularly useful while installing. Here are some of the fdisk options you might find useful at this time. For a complete list of possibilities, see fdisk(8). Starting Over If you find that you’ve completely ruined […]

Writing current MBR to disk. … fdisk will print out your MBR partition information one last time, and then the install program proceeds to the disklabel section. [1]Cylinder 0, head 0, sector 1 is the Master Boot Record itself. Page 92
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BIOS Starting cylinder [0 - 2437]: [0] 892 BIOS Starting head [0 - 254]: [0] 0 BIOS Starting sector [1 - 63]: [0] 1 BIOS Ending cylinder [0 - 2437]: [0] 1927 BIOS Ending head [0 - 254]: [0] 254 BIOS Ending sector [1 - 63]: [0] 63 fdisk:*1> […]

At the end of the line, we have the 8 partition type in clear English. We could get this information by looking up partition ID 0×0B in a table, but it’s certainly convenient to print it here. Finally, fdisk presents a command prompt. fdisk: 1> We want to […]

Using fdisk During an Install For this example, I’m dividing a 20GB IDE hard drive between Windows XP and OpenBSD. The first 7GB of the hard drive hold a standard install of Windows XP, on a FAT32 file system. I want to put an 8GB OpenBSD install immediately after that. Prepare […]

Hard Disk Geometry “Rectangular, with rounded corners.” Sorry, that’s not the geometry we mean. Disk geometry generally refers to the layout of the disks internally. If you open the case of a hard drive you’ll find a stack of round disks, commonly called platters . They’re covered with a layer […]