Grub2 fails to install to the MBR of /dev/sdb
Lester M Petrie
lmpetrie at bellsouth.net
Sat Jan 14 00:29:11 UTC 2012
On 01/13/2012 05:06 PM, Itamar Reis Peixoto wrote:
> On Fri, Jan 13, 2012 at 7:53 PM, Greg Woods<woods at ucar.edu> wrote:
>> On Fri, 2012-01-13 at 16:43 -0500, Lester M Petrie wrote:
>>
>>> Number Start End Size Type File system Flags
>>> 3 32.3kB 526MB 526MB primary ext4 boot
>>
>> Doesn't prove I'm right, but it's another data point. My laptop that
>> doesn't allow me to update grub2 configuration also has a start at
>> 32.3kB like yours. The workstation that works starts at 1049kB.
>> Hopefully someone can confirm that my theory (that more room at the
>> beginning of the disk prior to the start of the first partition) is
>> needed in order for grub2-install to work or grub2-mkconfig to have any
>> effect) before I go through all the work of dumping, repartitioning, and
>> restoring.
>>
>> --Greg
>>
>>
> yes, you need to leave 1MB free at begin of the disk
>
> this means 2048 sectors x 512 kb (2048*512)
>
>
>
> ------------
>
> Itamar Reis Peixoto
> msn, google talk: itamar at ispbrasil.com.br
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>
That partition is the /boot partition, and its 526MB. How feasible
would it be to backup /boot, reboot the install DVD in rescue mode,
delete and recreate the partition leaving the 1MB at the beginning, and
then restore the backed up partition? What would be the best program to
use for the repartitioning? Some time ago I did some repartitioning
using sfdisk, and it wasn't very pleasant, although I can probably work
out what I need to use that.
--
Lester M Petrie
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