DeHackEdBill Ate Tux's Rocket
reply to Rexter
Re: MBR vs /boot Often times you have complicated filesystems (btrfs, ZFS, or ext4 on LVM, you can imagine more) holding your root filesystem. If you don't have a /boot, the root is certainly where you'd put your bootloader and kernel. To make life a hell of a lot easier for the bootloader, /boot is usually a simple primary partition formatted ext2/3/4.
Also, long ago there were BIOS limitations on accessible disk sectors, usually about the 512 MB or 8.4 GB lines. Use of a tiny /boot at the start of the disk would keep you safe.
Both of these restrictions are going away with grub2 and modern BIOS systems but a lot of installers will still default to making a /boot to be better safe than sorry.