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Thread: Problems with minirt.gz - unknown-block(1,3)

  1. #1

    Problems with minirt.gz - unknown-block(1,3)

    Hi !
    This is the first time I write to this forum.
    I have been working with remastering of 5.0.1 version, everything was alright (remove & add packages), until I decided to make a little change in the Welcome message, replacing "Welcome to Knopppix ...", with "Welcome to Avionix, based on Knoppix ...".
    I modified the linuxrc file, inside minirt.gz (uncompress, mount, edit, umount and compress again) and build a new ISO and burn a CD.
    After this, system doesn't boot and display an error:

    Kernel Panic: not syncing: VFS: Unable to mount root fs unknown-block(1,3)

    If I restore the original minirt.gz, everything works well again.
    I have been "googling" and applying lot of "recipes" and advices, but I can not solve this problem.
    I appreciate your help.

    There are the followed steps in details:

    mastercopy is the master directory needed for remastering, /working is an example working directory.

    cp /mastercopy/boot/isolinux/minirt.gz /working/
    cd /working
    gunzip minirt.gz
    mkdir mnt
    mount -o loop minirt ./mnt

    Now, I can edit (with nano or vi text editor) and save ./mnt/linuxrc file

    umount ./mnt
    gzip -9 minirt

    cp minirt.gz /mastercopy/boot/isolinux/

    that's all

    Thanks in advance,
    Sebastian.

  2. #2
    Member registered user
    Join Date
    Jun 2004
    Posts
    89
    I saw this problem when I was working on the latest version of ParallelKnoppix. You need to edit linuxrc turning off Mac conversion. That is, do "nano -N linuxrc".

  3. #3
    Junior Member
    Join Date
    May 2007
    Posts
    4
    Quote Originally Posted by mcreel
    I saw this problem when I was working on the latest version of ParallelKnoppix. You need to edit linuxrc turning off Mac conversion. That is, do "nano -N linuxrc".
    Does it matter if we use vi instead of nano -N to edit the file ?
    I did read about minirt.gz not being too large. Though using gzip -9 should be sufficient.

    - LS

  4. #4
    Hi mcreel !
    Thanks a lot for your suggestion.
    Fortunately it solves the problem, now I have a Knoppix based system with customized startup messages.

    Sebastian.

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