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

From Aragorn <thorongil@telenet.be.invalid>
Newsgroups comp.os.linux.misc
Subject Re: Linux Wheezy just compiled 3.2.65 kernel does not see UUID of my 1st partition anymore.
Followup-To comp.os.linux.misc
Date 2015-02-23 19:43 +0100
Organization A noiseless patient Strider
Message-ID <mcfsc1$teg$1@dont-email.me> (permalink)
References <slrnmemf02.2if.moi@Amd64.Mydomain.net> <mcfofk$1as$1@dont-email.me> <slrnmemtsc.573.moi@Amd64.Mydomain.net>

Followups directed to: comp.os.linux.misc

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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).

-- 
= Aragorn =

         http://www.linuxcounter.net - registrant #223157

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Thread

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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