Am Samstag, den 19.12.2009, 15:29 +0000 schrieb ceg:

> * grub-install --root-directory=/media/<label> /dev/sdb5
> 
> With grub2, it first broke the chainloading of grub2 in sda5 from a
> dedicated grub1 partition on me (the boot sequence installed and used
> normally). -> Grub2 needed "grub-install /dev/sda5" to work again.

Should never happen if both the directory given with --root-directory is
the drive/partition you want and also the device you give grub-install.
Though you should always install to MBR and not a bootsector.

> Now (possibly some updates later) "grub-install --root-
> directory=/media/<label> /dev/sdb5" complains about not reading
> /grub/core.img
> 
> # grub-install --root-directory=/media/<label> /dev/sdc5
> grub-setup: warn: Attempting to install GRUB to a partition instead of
> the MBR.  This is a BAD idea.
> grub-setup: warn: Embedding is not possible.  GRUB can only be
> installed in this setup by using blocklists.  However, blocklists are
> UNRELIABLE and its use is discouraged.
> grub-setup: error: Cannot read `/grub/core.img' correctly

That bug should be fixed now in lucid.

-- 
Felix Zielcke
Proud Debian Maintainer and GNU GRUB developer

-- 
failures on grub-install to create rescue boot media
https://bugs.launchpad.net/bugs/498533
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