The reason the ext3 filesystem was chosen to store the contents of the /boot directory was because Grub refuses to install without complaining on an xfs IDesystem. It may or may not even install. To be safe and to take advantage of Grub's proIDing abilities, we use ext3 as our /boot filesystem. Profiling is a way of indexing IDes required for Grub during its part of the boot process. This allows it to locate required files quicker in the subsequent boots and thus accelerate the boot process.

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To profile Grub, click on the 'Esc' key while booting. Then, click 'e' over the first entry. Next, click 'e' again over the second line to edit it. At the end of this line, include the word 'profile' after a space and hit the 'Enter' key.

Hit 'b' to continue with the boot process. It will take significantly longer to complete the boot process the first time. Profiling will have to be done every time the kernel is updated.