GRUB is a boot loader for GNU/Linux. This stage is normally totally automated. In fact, DrakX will analyze the disk boot sector and will act accordingly depending on what it finds here:
if it finds a Windows boot sector, it will replace it with a GRUB boot sector so that you can start GNU/Linux or Windows;
if it finds a GRUB boot sector, it will replace it with a new one;
If in doubt, DrakX will ask you where you want to install GRUB (figure 6-27).
In most cases, you will not change the default (/dev/hda), but if you prefer, the bootloader can be installed on the second hard drive (/dev/hdb), or even on a floppy disk (/dev/fd0).
Beware that if you choose not to install a bootloader (by selecting Cancel here), you must ensure that you have a way to boot your Linux-Mandrake system! Also be sure about what you are doing if you change any of the options here.
Linux-Mandrake normally installs its own bootloader, which will let you boot either GNU/Linux or any other operating systems which you have on your system. The bootloader will be GRUB on Intel architectures. The example figure 6-28 shows a sample GRUB configuration window.
If there is another operating system installed on your machine, it'll be automatically added to the boot menu. Here you can choose to fine-tune the existing options.