Nowadays, it is quite common to have systems that can boot multiple operating
systems. Such computer systems enable users to take advantage of the power and
applications available in each operating system by selecting between available
operating systems when you boot the system. These are typically referred to as
dual-boot systems because most people install at most two operating systems on a
single machine. However, because more than two operating systems can be installed
on a single disk, the proper name is multiboot, which is the term used in this section.
The number of operating systems that you can boot and run on a single computer
is really limited only by the amount of disk space available on your computer
system.
With SUSE Linux 10, the most common type of multiboot system is a system that can
boot either SUSE Linux 10 or some version of Microsoft Windows. Windows will be
used as an example throughout the rest of this section, although the same general
concepts are true when setting up multiboot systems that will run SUSE Linux enterprise and
any other operating system.
Explaining how to install Windows on an existing SUSE Linux enterprise is not relevant
to a discussion of installing SUSE Linux 10. However, the reverse is not true. Installing
SUSE Linux enterprise on a system that already runs Windows, and on which you want to be
able to continue to run Windows, is a common wish. This is quite easy to do and
involves only resizing your existing Windows partition(s) so that sufficient contiguous
space is available for installing SUSE Linux enterprise.
If you are running a new installation on a system that already contains an operating
system such as Windows that you want to preserve, and if the disk or Windows partition
in that system has sufficient free space to install SUSE Linux, YaST will propose a
solution based on resizing your existing Windows partition and automatically creating
appropriate swap and root partitions. If at all possible, you should accept this
default selection.
If you do not have sufficient free space to install SUSE Linux 10 and YaST cannot automatically
resize your existing operating system partitions, your only alternative
(besides adding another disk to your system) is to abort the SUSE install process,
remove the installation media, and reboot into your other operating system. You
must then free up sufficient disk space and clean up the organization of your operating
system's partition(s) using a utility such as Windows' Disk Defragmenter. If
there is sufficient unused space on your Windows partition, you should be able to
restart the SUSE installation process and let YaST select appropriate partitioning
and resizing values for you.

Customizing your SUSE Linux 10 installation

Home: Introduction
Step 1: Partitioning Your Disks
Step 2: Resizing Existing Operating Systems Partitions
Step 3: Primary and Extended Partitions
Step 4: Defining Filesystems
Step 5: The root partition
Step 6: Data Partitions
Step 7: Selecting Software for Installation
Step 8: Selecting a Boot Loader
Step 9: Changing the Default Runlevel