Hi all,
Here it is some of the grub terms we are using oftenly
stage1,stage1.5,stage2,init,init-rd,
After the Bios’s post stage1 will be initialized ,then stage1 calls the remain functions of stage1,then also it calls stage2
stage1.5 is optional not mandatory
after stage2 kernal will be loaded in init-rd
links to GRUB2 basics :: http://ubuntuforums.org/showthread.php?t=1195275