Re: Grub2 reinstall on raid1 system.
On Sat, Jan 15, 2011 at 9:06 AM, Henrique de Moraes Holschuh
<hmh@debian.org> wrote:
> On Sat, 15 Jan 2011, Jack Schneider wrote:
>> > >> You might want to try configuring grub and fstab to use UUID's
>> > >> instead of /dev/mdX. That removes the possibility that the kernel
>> > >> will change the mdX designations.
>> > >>
>> > >> Use blkid to find out the UUID's of your partitions.
>
> Whatever you do, NEVER use the UUIDs of partitions, use the UUID of the
> md devices. The worst failure scenario involving MD and idiotic tools
> is for a tool to cause a component device to be mounted instead of the
> MD array.
>
> This is one of the reasons why the new MD formats that offset the data
> inside the component devices exists.
If you want to use an md device's UUID in grub.cfg, you're going to
have to edit it by hand or edit the grub2 scripts. AFAIK, they'll only
use the md device names because they're unique (through their UUIDs).
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