[Trisquel-users] Re : How to install GPT on BIOS & full disk encryption (with boot)?

[lcerf]

There is no filesystem (hence no file) on a BIOS boot partition. That concept  
is unknown to the BIOS. Your BIOS boot partition only has GRUB's stage 1.5  
code, which includes drivers to read all the popular filesystems. In this way  
stage 2 can be in regular files in /boot/grub, kernel images can be loaded by  
their paths, etc.

'grub-install' has not had a --root-directory option since GRUB 1.99. It  
still has a --boot-directory option though. It specifies, well, the boot  
directory, i.e., /boot by default. It is useful when installing from a live  
system (otherwise 'grub-install' will consider the /boot of the live system).