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Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore.

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Le Mon, 23 Feb 2015 19:43:54 +0100,
 Aragorn <thorongil@telenet.be.invalid> disait ceci :
> On Monday 23 February 2015 19:32, Pim conveyed the following to 
> comp.os.linux.misc...
>
>> Le Mon, 23 Feb 2015 18:37:33 +0100,
>>  Aragorn <thorongil@telenet.be.invalid> disait ceci :
>>> On Monday 23 February 2015 15:18, Pim conveyed the following to
>>> comp.os.linux.misc...
>>>
>>>> Hi all.
>>>> Could you read everything please : i try to give all the details.
>>>> 
>>>> I'm on Debian wheezy and i just compile a knew kernel comming from
>>>> debian Distribution.
>>>> In fact it is the last dpkg update kernel source
>>>> for the stable wheezy.
>>>> 
>>>> uname -a gives:
>>>> Linux Amd64 3.2.65 #1 SMP Mon Feb 16 22:04:41 CET 2015 x86_64
>>>> GNU/Linux
>>>> 
>>>> Unfortunately it does not sees my root partition / if I tell grub2
>>>> to search it by UUID.
>>>> 
>>>> Note that i have my /boot partition (where leaves the kernel and so)
>>>> different from the / partition (linux system and linux tree entry).
>>>> 
>>>> On boot i have a message like:
>>>> blkid : cannot find UUID=xxxxx or something like that when booting
>>>> by /dev/sdb5 : possibly that uuid is red in /etc/fstab.
>>>> But trying to boot with uuid give a kernel panic
>>>> unable to boot on (0,0) or something like that.
>>>> Note also the i did compile kernel WITHOUT initrd.
>>>>
>>>> [...]
>>>
>>> That last quoted line above says it all.  The kernel does not by
>>> itself support UUIDs or LABELs.  If you want to boot a kernel while
>>> using a UUID or a LABEL in your grub.cfg or at the kernel boot line,
>>> then you'll need to create an initramfs.
>> 
>> Thank's for reply.
>> Ok.
>> Could you explain me why that please : how does it work?
>
> I'm not sure exactly, but I believe that the interpretation of UUIDs and 
> LABELs is done in userspace, normally, so at boot time, the kernel 
> doesn't have any idea what those UUIDs or LABELs are.  The initramfs 
> however contains the tools needed for the interpretation ??? most notably, 
> udev (now part of systemd).

Thank's for reply.

I don't know myself but i think it is just that /dev filesystem must
be mounted and the uuid can be found in /dev/disks/by-uuid/xxx

Sorry but this entry :

title           Debian GNU/Linux, kernel 2.6.26 (single-user mode)
root            (hd0,0)
kernel          /vmlinuz-2.6.26 root=UUID=93dbe8dc-adf2-4dbe-b001-fd65006d568d
ro single

comes from and old kernel of mine i compiled without initrd
the file is menu.lst, means grub1 and i remember it booted very well.

So why should not it work too with a recent kernel 3.xxx?

I liked this kind of conf because it is very thin et very efficient.

I don't like heavy things.

Thank you very much!

But the problem is NOT resolved :( for myself :(.

>
> -- 
> = Aragorn =
>
>          http://www.linuxcounter.net - registrant #223157

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Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-23 14:18 +0000
  Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Aragorn <thorongil@telenet.be.invalid> - 2015-02-23 18:37 +0100
    Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-23 18:32 +0000
      Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Aragorn <thorongil@telenet.be.invalid> - 2015-02-23 19:43 +0100
        Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-23 19:30 +0000
          Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Aragorn <thorongil@telenet.be.invalid> - 2015-02-24 09:08 +0100
      Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-02-23 17:50 -0500
        Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-24 02:41 +0000
          Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-02-24 01:29 -0500
            Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-24 18:32 +0000
            Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Jerry Peters <jerry@example.invalid> - 2015-02-24 21:16 +0000
    Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-02-27 21:47 +0100
      Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pim <moi@free.fr> - 2015-02-27 23:43 +0000
      Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Aragorn <thorongil@telenet.be.invalid> - 2015-02-28 00:44 +0100
        Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-02-28 14:29 +0100
          Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Aragorn <thorongil@telenet.be.invalid> - 2015-02-28 21:10 +0100
            Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore. Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-03-01 10:40 +0100

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