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I do not see my DVD, I do not know how to access its corrupted data.
What is the way to recover the data with command line?

1 Answer 1

2

from this source


  1. get the path of your DVD with blkid

    #example:
    blkid
    /dev/sda1: UUID="4ea68146-163e-4ce6-aeda-4cc2d338c2ed" TYPE="ext4" 
    /dev/sdb1: UUID="e1977a53-b9f4-4c96-9251-84af259d06b4" TYPE="swap" 
    /dev/sdb5: UUID="a85b1b95-c5ce-4557-9ca4-503b1a9ddcc8" TYPE="ext4" 
    /dev/sdb6: UUID="c71a7601-04b8-4808-8f7b-ec967ac967ba" TYPE="ext4" 
    /dev/sr0: LABEL="Disc" TYPE="udf"
    

    sdaand sdbare Hard Disk. /dev/sr0 is the DVD


  1. then to acces the DVD content, use foremost
    (Install it with sudo apt-get install foremost)

    List the content of the DVD (even the erased one):

    sudo foremost -w /dev/sr0
    Processing: /dev/sr0
    |********************************************|
    

    Result is available with:

    sudo cat ~/output/audit.txt | more
    
    Foremost version 1.5.7 by Jesse Kornblum, Kris Kendall, and Nick Mikus
    Audit File
    
    Foremost started at Tue Jun 14 23:25:18 2016
    Invocation: foremost -w /dev/sr0 
    Output directory: /home/yourlogon/output
    Configuration file: /etc/foremost.conf
    ------------------------------------------------------------------
    File: /dev/sr0
    Start: Tue Jun 14 23:25:18 2016
    Length: 4 GB (4573593600 bytes)
    
    Num  Name (bs=512)         Size  File Offset     Comment 
    
    0:        1152.jpg         2 MB          589824      
    1:        7168.jpg         2 MB         3670016      
    2:       13292.jpg         2 MB         6805504      
    3:       19368.jpg         2 MB         9916416      
    4:       24808.jpg         2 MB        12701696      
    5:       30464.jpg         2 MB        15597568      
    6:       35132.jpg         2 MB        17987584      
    7:       40868.jpg         2 MB        20924416      
    8:       46916.jpg         2 MB        24020992
    ...
    

  1. To recover all data

    sudo foremost all /dev/sr0
    Processing: /dev/sr0
    |********************************************|
    

    everything is then available in ~/output/


  1. And to make files available sudo chmod -R 777 ~/output/
4
  • Foremost is a file carver, it should be used as a last resort when the file system is not available. Was this the scenario? I.e. file system corruption? Jun 15, 2016 at 11:25
  • @AndreaLazzarotto, In this case: a friend tried to re-write on the DVD, and his data get corrupted, he could not access his data anymore (on Windows). Loading his DVD, I couldn't see any data too on Ubuntu, so I tried for this process of recovery and it worked.
    – Boris
    Jun 15, 2016 at 21:07
  • OK but my doubt is... Why not trying with the standard tools like Testdisk first? :-) I am just curious. If the scenario was that of deep corruption maybe it should be stated in the answer. Jun 17, 2016 at 8:55
  • @AndreaLazzarotto , i don't know testdisk. Fill free to edit the answer to improve it, or propose your answer to share.
    – Boris
    Jun 17, 2016 at 17:02

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