Now, the installation program will display a list of the partitions you have assigned to Linux, and ask you to select which, if any, of these partitions you want to format as new file systems. Likely, you will want to format all of them, except if you are upgrading your system or perhaps have some information (eg. on /home) that you don't want to lose.
Again, I recommend you enable the “Check for bad blocks during format” option.