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marfeljoergsen/luks_backup.txt

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Created January 2, 2020 06:01
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  1. @andyrbell andyrbell created this gist Mar 10, 2019.
    45 changes: 45 additions & 0 deletions luks_backup.txt
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    backup luks partition

    1. Boot clonezilla

    2. Drop into the command line

    3. open the encrypted external drive partition

    cryptsetup luksOpen /dev/sda3 backup

    4. mount as partimag

    mount /dev/mapper/backup /home/partimag

    5. open the internal encrypted partitions

    cryptsetup luksOpen /dev/sda3 crypt1
    (enter pass)
    cryptsetup luksOpen /dev/sdb1 crypt2
    (enter pass)

    6. lvm should automatically appear in /dev/mapper
    e.g. /dev/mapper/fedora-home
    /dev/mapper/fedora-root
    etc
    if not can try vgchange -ay

    7. Perform backup with partclone

    partclone.ext4 -c -s /dev/mapper/fedora-root -o /home/partimag/backup/fedora-root-2017-09-24.img

    8. When complete can restore to an image file to be able to mount and read:

    touch /mnt/backup/restored.img
    partclone.restore -C -s /home/partimag/backup/fedora-root-2017-09-24.img -O /mnt/backup/restored.img
    mount -t ext4 /mnt/backup/restored.img /mnt/data -o loop

    try to restore to a different device especially if the image is large as the data transfer speed will be halved. It took 8 hours for a 1.4TB partition that was 50% used.

    9. If unable to mount image because of "ext4 bad geometry" then fix the image:

    e2fsck -f /mnt/backup/restored.img
    resize2fs /mnt/backup/restored.img

    then try to mount again