Hi,
I'd update this myself but I'm unclear how GRUB 2 actually works now,
and the Wikipedia page seems to be describing how it works incorrectly.
AFAIK GRUB2 did away with the Stage 1.5.
https://en.wikipedia.org/wiki/GNU_GRUB#GRUB_version_2_.28GRUB.29
Specifically these bullets.
- Stage 1: boot.img is stored in the master boot record (MBR), or
optionally in any of the volume boot records (VBRs), and addresses the
next stage by an LBA48 address (the 1024 cylinder boundary of GRUB
legacy is omitted); at installation time it is configured to load the
first sector of core.img.
- Stage 1.5: core.img is by default written to the sectors between the
MBR and the first partition, when these sectors are free and available.
For legacy reasons, the first partition of a hard drive does not begin
at sector 1 (counting begins with 0) but at sector 63, leaving a gap of
62 sectors of empty space. That space is not part of any partition or
file system, and therefore not prone to any problems related with it.
Once executed, core.img will load its configuration file and any other
modules needed, particularly file system drivers; at installation time,
it is generated from diskboot.img and configured to load the stage 2 by
its file path.
- Stage 2: files belonging to the stage 2 are all being held in the
/boot/grub directory, which is a subdirectory of the /boot directory
specified by the Filesystem Hierarchy Standard (FHS).
Please let me know if I can help make these edits.
Thanks,
-Sam
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