Specifically, repartitioning existing systems on which some version of the
Mac OS is already installed can be very difficult because of the types of file systems used on modern
Macintosh computers. This section does not discuss repartitioning.
Before you start installation, back up any data you want to retain on external media
(CD, hard drive, and so on). If you are installing Yellow Dog on a separate disk, this is a
precautionary measure in case your system overwrites data that is important to you (or you accidentally
select the wrong disk). In all other cases, the standard mechanisms (described in this section)
for partitioning a disk require that you format your disk, erasing all of your existing data. If you want
to repartition an existing disk without losing data, I suggest using software such as ProSoft??™s Drive
Genius, which is as good as its name suggests.
After backing up your important data, the next step is to determine whether you are going to
multi-boot Mac OS with Yellow Dog Linux or install Yellow Dog Linux as a standalone product. If
you choose to multi-boot, you must decide whether you will use two hard drives or partition (that
is, logically divide) a single hard drive to house both Linux and Mac OS.
CAUTION
371
Running Yellow Dog Linux 12
If you choose to multi-boot, the Yellow Dog installer gives you the option to resize an
existing volume to make room for Yellow Dog.
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