[Bug 137314] Re: blkid shows outdated / wrong UUID

[martin suc]

Hi,

I know that it is old post but I believe my experience is corresponding
with the mentioned problems:

Every-time when I rearranged internal/external/usb hard disk/s
partition/s (for example for RAID0 array/s blkid always had wrong info).
It happened all the time from natty to precise distro ubuntu. For ubuntu
original compiled kernel from 2.6.x.x to 3.2.x.x versions.

Just small example from today:

blkid|sort
...
/dev/sdl1: LABEL="EFI" UUID="cfb104a6-6b8d-46d1-b75b-1ef00a3f59ef" TYPE="ext2" 
/dev/sdl2: UUID="3c9cec88-bb36-44af-b303-671c8e985d7e" TYPE="swap" 
/dev/sdl3: UUID="6ab6304e-ca1c-f4d0-5749-0a6711686b87" UUID_SUB="c56352cc-1535-d113-e3ff-177997f66d65" LABEL="UBU2TBEXT42:raid0ocz" TYPE="linux_raid_member" 
/dev/sdm1: UUID="6ab6304e-ca1c-f4d0-5749-0a6711686b87" UUID_SUB="751807af-60a3-d541-3476-cc5a31db0d88" LABEL="UBU2TBEXT42:raid0ocz" TYPE="linux_raid_member" 
/dev/sdn1: UUID="6ab6304e-ca1c-f4d0-5749-0a6711686b87" UUID_SUB="c45ae821-e9f3-aada-a538-d4041ce4db0f" LABEL="UBU2TBEXT42:raid0ocz" TYPE="linux_raid_member" 
/dev/sdo1: UUID="6ab6304e-ca1c-f4d0-5749-0a6711686b87" UUID_SUB="8eacee1a-3217-7ed7-e22b-76fc61b0bb05" LABEL="UBU2TBEXT42:raid0ocz" TYPE="linux_raid_member" 

compared to:
gdisk -l /dev/sdl  /dev/sdm /dev/sdn /dev/sdo
...
Disk identifier (GUID): EF900EC5-4F8E-47D0-875E-6A261FC2F413
...
Number  Start (sector)    End (sector)  Size       Code  Name
   1              34       117226304   55.9 GiB    FD00  PCEUBU1:raid0ocz
...

(just noticed - the same UUID for all four partitions, different label
name )

--- my experience:
gparted - shows wrong labels and UUIDs
gnome disk utility - shows proper information
blkid command - shows wrong information
gdisk - shows proper information
-- for all previous  it happened even after reboot.
-- I remember those problem have appeared in grub prompt either ( when set root = (tab key) 
or showing wrong information for blkid in initramfs prompt.

(for blkid: 
before reboot blkid/gparted shows wrong TYPE="" of partition)
after reboot blkid shows properly TYPE="linux_raid_memeber")

(I have created more than 50 RAID0 arrays within last year - it behaves
always the same way for blkid command)

lsb_release -rd
Description:	Ubuntu 12.04 LTS
Release:	12.04

apt-cache policy gparted
gparted:
  Installed: 0.12.1-1~getdeb2~precise
  Candidate: 0.12.1-1~getdeb2~precise
  Version table:
 *** 0.12.1-1~getdeb2~precise 0
        500 http://archive.getdeb.net/ubuntu/ precise-getdeb/apps amd64 Packages
        100 /var/lib/dpkg/status
     0.11.0-2 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

apt-cache policy libblkid1
libblkid1:
  Installed: 2.20.1-1ubuntu3
  Candidate: 2.20.1-1ubuntu3
  Version table:
 *** 2.20.1-1ubuntu3 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

apt-cache policy util-linux
util-linux:
  Installed: 2.20.1-1ubuntu3
  Candidate: 2.20.1-1ubuntu3
  Version table:
 *** 2.20.1-1ubuntu3 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

 apt-cache policy gdisk
gdisk:
  Installed: 0.8.1-1build1
  Candidate: 0.8.1-1build1
  Version table:
 *** 0.8.1-1build1 0
        500 http://archive.ubuntu.com/ubuntu/ precise/universe amd64 Packages
        100 /var/lib/dpkg/status

apt-cache policy gnome-disk-utility
gnome-disk-utility:
  Installed: 3.0.2-2ubuntu7
  Candidate: 3.0.2-2ubuntu7
  Version table:
 *** 3.0.2-2ubuntu7 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status



If you have any further question - please do not hesitate to contact me.
Kind Regards,
M.
P.S. If I missed some information from previous posts - I am sorry - I did not read everything.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to e2fsprogs in Ubuntu.
https://bugs.launchpad.net/bugs/137314

Title:
  blkid shows outdated / wrong UUID

Status in “e2fsprogs” package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: libblkid1

  blkid shows outdated and wrong information on UUID and label for
  partitions that were reformatted after initial installation.

  After reformatting and relabeling partitions, blkid does not reflect
  the change (not even after reboot) and delivers misleading information
  about which UUID to put in /etc/fstab to mount the partition by UUID.

  This causes boot failures on systems which were restored by partition-
  imaging software that possibly changes the UUID of the restored
  partition (which is necessary, if there is already another partition
  present with the same UUID). Also installation of a second Linux
  system on the same Computer regularly reformats the swap-space, so the
  previously installed system doesn't find its swap anymore.

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