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Thread: Partitions turned into ext4?

  1. #1
    Join Date
    Jan 2006
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    27

    Partitions turned into ext4?

    Uhm... apparently my ext3 partitions have mysteriously turned into ext4 (I can assure you: I have not converted or formatted them myself), and at boot grub now complains that ext4 format is not supported...

    I'm typing this from my 8.10 live cd, and when trying to mount my local partitions I get a similar error:

    "The volume uses the ext4 file system which is not supported by your system".


    - Why are my drives suddenly tagged as ext4?
    - Reading about ext4 before, grub should be able to boot up by treating them as ext3 drives... I have no idea why grub thinks they're ext4 drives now (some update must have changed my grub config), but what should I install on 8.10 to get ext4 support so I can edit my grub configs?

  2. #2
    Join Date
    Jan 2006
    Beans
    27

    Re: Partitions turned into ext4?

    Attempting to mount it on livecd as ext4dev:

    [ 1368.104877] EXT4-fs: sda1: not marked OK to use with test code.

  3. #3
    Join Date
    Jan 2006
    Beans
    27

    Re: Partitions turned into ext4?

    Fixed above error by using debugfs:

    debugfs: set_super_value s_flags 4



    Still unsure why grub wont boot my ext4 partition (and unsure why it's ext4 in the first place)

  4. #4
    Join Date
    Jan 2006
    Beans
    27

    Re: Partitions turned into ext4?

    And back to my normal install... Managed to mount stuff on my livecd, chrooted into my normal ubuntu partition and then executed a grub-install /dev/sda1 --recheck

    All fine now

  5. #5
    Join Date
    Aug 2008
    Beans
    1,835
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Partitions turned into ext4?

    Quote Originally Posted by clearscreen View Post
    Fixed above error by using debugfs:

    debugfs: set_super_value s_flags 4



    Still unsure why grub wont boot my ext4 partition (and unsure why it's ext4 in the first place)
    The version of grub in the Jaunty Beta does boot from ext4 partition. I originally installed Jaunty on ext3 and then converted the partitions to ext4 using tune2fs & efsck from the live CD. Then edited the fstab. I half expected that grub wouldn't work but it did. Maybe your version of grub didn't get updated?

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