Public bug reported:
Binary package hint: grub2
9.10
The following example used to work with grub1 to create separate rescue
boot media:
* Plugged in the USB Stick which contains a dedicated grup partition and
chainloads other (rescue) boot partitions for several installations that are on
the stick.
* cp -r /boot /media/<label>
* adjusted device.map
* 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.
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
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
--
failures on grub-install to create rescue boot media
https://bugs.launchpad.net/bugs/498533
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