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Thread: eth0 vs eth1 abd enp31s0 and disk UUIDs

  1. #21
    Join Date
    Jan 2014
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    Erlangen
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    Default Re: eth0 vs eth1 abd enp31s0 and disk UUIDs

    Quote Originally Posted by pruda View Post
    Thank you again for patience with explaining. How that happened with eth1 have been perfectly explained and I know it surely. UUIDs have been perfectly explained too. But what caused the change of UUID of the same partition on the same disk, that is still not quite clear. To explain better, system tried to boot, but halted half way with wait message and time count (I don't remember exactly the message), but it waited indefinitely (there was no time limit). I suspect it was because of btrfs partition, which I have for extra data mounted to /mydata. And UUID of this partition must have been different in the new system. I don't know if I put into fstab the UUID of the GPT partition, or UUID of btrfs, because I was not aware (before this discussion) that the very same thing can have multiple UUIDs. It was surely my mistake, I simply picked up "variable" UUID. But how can I distinguish persistent UUID from one that will can change when placed into other system?

    @karlmistelberger : so those UUIDs marked with bold font should be those persistent across systems, right?
    • UUID is short for 'filesystem UUID'. Whenever using it make sure value in /etc/fstab matches the output of 'lsblk -o PATH,UUID'. yast partitioner will do this for you. Run 'yast bootloader' to get a consistent boot loader.
    • As an alternative you may copy and paste from lsblk output to file /etc/fstab. Update boot loader by running 'grub2-install' and ' grub2-mkconfig -o /boot/grub2/grub.cfg'.
    AMD Athlon 4850e (2009), openSUSE 13.1, KDE 4, Intel i3-4130 (2014), i7-6700K (2016), i5-8250U (2018), openSUSE Tumbleweed, KDE Plasma 5

  2. #22

    Default Re: eth0 vs eth1 abd enp31s0 and disk UUIDs

    Hello and thank you, they are the same with lsblk too and they were the same in the old system. Yet it does not boot with them in the new system. What can be the cause?
    Code:
    sudo lsblk -o PATH,UUID
    [sudo] password for root: 
    PATH           UUID
    /dev/sda       
    /dev/sda1      
    /dev/sda2      
    /dev/sda3      d5695e9c-3636-4a34-b9b0-4e2f2bfd59d1
    /dev/sda4      0940ed5f-4343-4d89-be0a-015083bdf579
    /dev/sda5      f3a39d2f-b333-4457-b6ec-ecf6339987e7
    /dev/sdb       
    /dev/sdb1      4ccd3339-f992-4e6e-aac9-744fe2f26f0f
    /dev/sdb2      
    /dev/sdc       
    /dev/sdc1      
    /dev/sdd       
    /dev/sdd1      
    /dev/sde       
    /dev/sde1      
    /dev/sdf       
    /dev/sdf1      
    /dev/sdg       
    /dev/sdg1      56990d56-8249-42fa-b149-d3aae69cf2f0
    /dev/sdg2      
    /dev/nvme0n1   
    /dev/nvme0n1p1 B5E3-931B
    /dev/nvme0n1p2 B5D3-BCA7
    /dev/nvme0n1p3 03345cc9-cd7f-4e67-b8ae-893342501433
    /dev/nvme0n1p4 eb62815f-8d7d-4250-b9a0-2f72dc1fd407
    /dev/nvme0n1p5 1f5787e9-b8ed-475b-9be3-4b7dc5db7278
    
    cat /etc/fstab
    LABEL=opensuse  /      ext4   noatime,acl,user_xattr  0  1
    LABEL=nvmeboot  /boot  ext4   noatime,acl,user_xattr,data=ordered  0  2
    LABEL=vms       /vm    btrfs  defaults  0  0
    #UUID=03345cc9-cd7f-4e67-b8ae-893342501433  /      ext4  noatime,acl,user_xattr  0  1
    #UUID=56990d56-8249-42fa-b149-d3aae69cf2f0  /boot  ext4  noatime,acl,user_xattr,data=ordered  0  2
    #UUID=eb62815f-8d7d-4250-b9a0-2f72dc1fd407  /vm    btrfs  defaults  0  0

  3. #23
    Join Date
    Jan 2014
    Location
    Erlangen
    Posts
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    Default Re: eth0 vs eth1 abd enp31s0 and disk UUIDs

    Quote Originally Posted by pruda View Post
    Hello and thank you, they are the same with lsblk too and they were the same in the old system. Yet it does not boot with them in the new system. What can be the cause?
    Code:
    sudo lsblk -o PATH,UUID
    [sudo] password for root: 
    PATH           UUID
    /dev/sda       
    /dev/sda1      
    /dev/sda2      
    /dev/sda3      d5695e9c-3636-4a34-b9b0-4e2f2bfd59d1
    /dev/sda4      0940ed5f-4343-4d89-be0a-015083bdf579
    /dev/sda5      f3a39d2f-b333-4457-b6ec-ecf6339987e7
    /dev/sdb       
    /dev/sdb1      4ccd3339-f992-4e6e-aac9-744fe2f26f0f
    /dev/sdb2      
    /dev/sdc       
    /dev/sdc1      
    /dev/sdd       
    /dev/sdd1      
    /dev/sde       
    /dev/sde1      
    /dev/sdf       
    /dev/sdf1      
    /dev/sdg       
    /dev/sdg1      56990d56-8249-42fa-b149-d3aae69cf2f0
    /dev/sdg2      
    /dev/nvme0n1   
    /dev/nvme0n1p1 B5E3-931B
    /dev/nvme0n1p2 B5D3-BCA7
    /dev/nvme0n1p3 03345cc9-cd7f-4e67-b8ae-893342501433
    /dev/nvme0n1p4 eb62815f-8d7d-4250-b9a0-2f72dc1fd407
    /dev/nvme0n1p5 1f5787e9-b8ed-475b-9be3-4b7dc5db7278
    
    cat /etc/fstab
    LABEL=opensuse  /      ext4   noatime,acl,user_xattr  0  1
    LABEL=nvmeboot  /boot  ext4   noatime,acl,user_xattr,data=ordered  0  2
    LABEL=vms       /vm    btrfs  defaults  0  0
    #UUID=03345cc9-cd7f-4e67-b8ae-893342501433  /      ext4  noatime,acl,user_xattr  0  1
    #UUID=56990d56-8249-42fa-b149-d3aae69cf2f0  /boot  ext4  noatime,acl,user_xattr,data=ordered  0  2
    #UUID=eb62815f-8d7d-4250-b9a0-2f72dc1fd407  /vm    btrfs  defaults  0  0
    LABEL lines are active and UUID lines are commented out! Move the #-signs to the former and rebuild boot loader and menu.
    AMD Athlon 4850e (2009), openSUSE 13.1, KDE 4, Intel i3-4130 (2014), i7-6700K (2016), i5-8250U (2018), openSUSE Tumbleweed, KDE Plasma 5

  4. #24
    Join Date
    Jun 2008
    Location
    Netherlands
    Posts
    25,402

    Default Re: eth0 vs eth1 abd enp31s0 and disk UUIDs

    Quote Originally Posted by pruda View Post
    Hello and thank you, they are the same with lsblk too and they were the same in the old system. Yet it does not boot with them in the new system. What can be the cause?
    Code:
    sudo lsblk -o PATH,UUID
    [sudo] password for root: 
    PATH           UUID
    /dev/sda       
    /dev/sda1      
    /dev/sda2      
    /dev/sda3      d5695e9c-3636-4a34-b9b0-4e2f2bfd59d1
    /dev/sda4      0940ed5f-4343-4d89-be0a-015083bdf579
    /dev/sda5      f3a39d2f-b333-4457-b6ec-ecf6339987e7
    /dev/sdb       
    /dev/sdb1      4ccd3339-f992-4e6e-aac9-744fe2f26f0f
    /dev/sdb2      
    /dev/sdc       
    /dev/sdc1      
    /dev/sdd       
    /dev/sdd1      
    /dev/sde       
    /dev/sde1      
    /dev/sdf       
    /dev/sdf1      
    /dev/sdg       
    /dev/sdg1      56990d56-8249-42fa-b149-d3aae69cf2f0
    /dev/sdg2      
    /dev/nvme0n1   
    /dev/nvme0n1p1 B5E3-931B
    /dev/nvme0n1p2 B5D3-BCA7
    /dev/nvme0n1p3 03345cc9-cd7f-4e67-b8ae-893342501433
    /dev/nvme0n1p4 eb62815f-8d7d-4250-b9a0-2f72dc1fd407
    /dev/nvme0n1p5 1f5787e9-b8ed-475b-9be3-4b7dc5db7278
    
    cat /etc/fstab
    LABEL=opensuse  /      ext4   noatime,acl,user_xattr  0  1
    LABEL=nvmeboot  /boot  ext4   noatime,acl,user_xattr,data=ordered  0  2
    LABEL=vms       /vm    btrfs  defaults  0  0
    #UUID=03345cc9-cd7f-4e67-b8ae-893342501433  /      ext4  noatime,acl,user_xattr  0  1
    #UUID=56990d56-8249-42fa-b149-d3aae69cf2f0  /boot  ext4  noatime,acl,user_xattr,data=ordered  0  2
    #UUID=eb62815f-8d7d-4250-b9a0-2f72dc1fd407  /vm    btrfs  defaults  0  0
    This thread has no title that points to a boot problem at all.

    Are we all goinf off-topic>

    When you have a boot problem, please start a thread with a title that covers this and in the post explain as much as possible abourt what you do and what happens. "It does not boot" differs from a broken BIOS, via shredded disks, faulty Grub configuration, .... until a boot that succeeded, but then got stuck because file systems could not be mounted. So we ned much more information.
    Henk van Velden

  5. #25

    Default Re: eth0 vs eth1 abd enp31s0 and disk UUIDs

    Quote Originally Posted by karlmistelberger View Post
    LABEL lines are active and UUID lines are commented out!
    Surely they are commented out, because it was not booting with them. I kept them just in case labels wouldn't work too, but fortunately labels worked.

    To stay "on topic", I will try to create another thread when I will be in the location with the server if I can afford downtime. I understand, that to help me you need more information.

    Thanks everyone for kind help, I have learned a lot.

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