[linux-lvm] Grub with UUID

[Fabricio Archanjo]

Ray,
When I use root=/dev/mapper/myvg-root (example) i can mount my root
partition, but when  i use UUID  i cannot mount and the lvm was
included in initramfs, i've checked it. It's too strange..

I get my UUID through vol_id, it's a tools of udev.

Thanks for reply,

On Thu, Oct 7, 2010 at 2:38 PM, Ray Morris <support at bettercgi.com> wrote:
>> I wanted to use GRUB with UUID when i pass the
>> boot flags root=. When i did this, my system cannot mount the root
>> more.
>
> root= is not a grub argument, it's a kernel argument.
> If it's wrong, you'll get a few dozen lines of output and then
> it'll say "can not mount root filesystem" or something similar.
>
> root (hd0,0) would be grub.  If it's wrong, you'll get less than
> a dozen lines of output before the error message.
>
> Try mounting first with root=/dev/sda2 or whatever, then double
> check a) the UUID and b) the syntax you're using, which should be
> something like:
> root=UUID=xxx
>
> If the root volume isn't a plain disk partition, but is rather
> a logical voume or mdadm, your initrd will need to include lvm,
> raid, or whatever else is needed to get the root volume up and
> running.
>
> See also super grub disk, which can be helpful for figuring all
> of this stuff out.
> --
> Ray Morris
> support at bettercgi.com
>
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> On 10/07/2010 12:12:56 PM, Fabricio Archanjo wrote:
>>
>> Hey all,
>>
>>
>> Sorry because my stupid question, but i don't know more. I'm using
>> Debian with LVM and I wanted to use GRUB with UUID when i pass the
>> boot flags root=. When i did this, my system cannot mount the root
>> more. May someone know why it happend? is there a problem with GRUB
>> v1??
>>
>>
>> Thanks all,
>>
>> _______________________________________________
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>> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>>
>>
>
>
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