Re: How many sectors for GRUB 2

[Andrey Borzenkov]

В Sat, 03 Nov 2012 15:23:41 +0100
Ulf Zibis <address@hidden> пишет:

> Am 03.11.2012 15:04, schrieb Andrey Borzenkov:
> >> Hi, thanks for your answer!
> >>
> >> core.img is in the filesystem at /boot/grub/ (at me also ~26 kB) in
> >> my linux partition. But I'm asking for the part of grub, which is
> >> not in the filesystem, outside the partition.
> >>
> > core.img is *the* part of grub which is installed in MBR gap.
> > Besides boot sector itself of course.
> 
> Aha, so does that mean, that the bytes in the hidden sectors are
> always a 100 % copy of /boot/grub/core.img ?
> 

Not quite, grub2 will modify some fields inside it when it is written
to disk. But it should not change size of it.

> So if I shrink the gap before 1st partition to a size, bigger than
> core.img, I'm save not having damaged GRUB 2 installation?
> 

Well ... are you absolutely sure it is exactly the same core.img that
was used during grub installation?