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Recover Mis-Configured or Broken LVM Configurations

In this exercise, you will need to assess the cause of a broken LVM configuration and resolve it without losing the data in the volume. *This course is not approved or sponsored by Red Hat.*

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Path Info

Clock icon Advanced
Clock icon 1h 0m
Clock icon Apr 04, 2019

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Table of Contents

  1. Challenge

    Resolve LVM configuration.

    Check the mounts with lsbkl:


    Attempt to mount the volume:

    mount /lvm_mount

    View the archive metadata:

    vgcfgrestore -l <VOLGROUP NAME>

    Review the changes:

    "Created before executing 'lvresize -L500M /dev/vg_1/lv_1'"

    Restore prior to latest change:

    vgcfgrestore -f /etc/lvm/archive/ vg_1

    Deactivate and reactive the volume:

    lvchange -an /dev/<VOLGROUP>/<LOG>
    lvchange -ay /dev/<VOLGROUP>/<LOG>
  2. Challenge

    Verify LVM volume contents.

    The MD5s of each file in the volume are available in the /home/cloud_user/lvm_md5s.txt file. Validate that the md5sums haven't changed for the files in the /lvm_mount directory.

    cat /home/cloud_user/lvm_md5s.txt
    for i in $(ls /lvm_mount/); do md5sum /lvm_mount/$i; done

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