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Thread: 163 GB data at 4.7 GB DVD

  1. #1
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    Question 163 GB data at 4.7 GB DVD

    I was shocked when want to copy of movies Oh My God! in my computer that recently purchased - there is not enough space on Disk. when i was see inside there is DVD data contains 163GB . all the screen shot avail(below).





    Is it possible 163GB of data can store in 4.7 GB of DVD . please any one help me how it possible outside memory 4.37 GB and inside 163GB . i am confused.
    Thank you

  2. #2
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    Re: 163 GB data at 4.7 GB DVD

    That's some kind of copy protection on the disk where it is padded out with dummy files.

  3. #3
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    Post Re: 163 GB data at 4.7 GB DVD

    Quote Originally Posted by nuttzo31 View Post
    That's some kind of copy protection on the disk where it is padded out with dummy files.
    is it possible ?? if , then How.??

  4. #4
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    Re: 163 GB data at 4.7 GB DVD

    No it is not possible.

    As the one above you said, there are copy-protection on the DVD so your system can't read it right.

  5. #5
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    Re: 163 GB data at 4.7 GB DVD

    There's not actually 163gb of data on the dvd the files are just filled with 0's or something like that.

  6. #6
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    Post Re: 163 GB data at 4.7 GB DVD

    Quote Originally Posted by pompel9 View Post
    No it is not possible.

    As the one above you said, there are copy-protection on the DVD so your system can't read it right.
    i have tested all .vob file . all are playing ok .

    VTS_01_1.vob, VTS_01_2.vob ...... VTS_01_5.vob contain movie

    also VTS_02_1.vob to VTS_02_5 .vob contain same movie and playing ok

    .
    .
    .
    .
    VTS_39_1.vob to VTS_39_5 .vob also contain same movie and playing ok


    .
    .
    .

    Last edited by ramakanta; November 30th, 2012 at 03:00 PM. Reason: screen shot add

  7. #7
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    Re: 163 GB data at 4.7 GB DVD

    Read up on sparse files

    Step 1
    Check diskspace before creating a 1GB file
    Code:
    wim@i3-2120:/mnt$ du --max-depth=1
    32	./boot-sav
    219602196	./photos
    219602232	.
    wim@i3-2120:/mnt$ df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda5       138G  4,9G  126G   4% /
    udev            3,7G  4,0K  3,7G   1% /dev
    tmpfs           1,5G  856K  1,5G   1% /run
    none            5,0M     0  5,0M   0% /run/lock
    none            3,7G  216K  3,7G   1% /run/shm
    /dev/sda6       532G   14G  491G   3% /home
    /dev/sdc1       925G  210G  706G  23% /mnt/photos
    Step 2
    Create a 1GB file
    Code:
    wim@i3-2120:/mnt$ cd photos/wim/
    wim@i3-2120:/mnt/photos/wim$ dd if=/dev/null of=sparse-file bs=1k seek=1000000 count=1
    0+0 records in
    0+0 records out
    0 bytes (0 B) copied, 2,112e-05 s, 0,0 kB/s
    wim@i3-2120:/mnt/photos/wim$ ls -l
    total 33016
    -rwxr-xr-x 1 wim wim    6068196 Jan 11  2011 IMGP2310 (copy).jpg
    -rwxr-xr-x 1 wim wim   10801944 Jan 11  2011 IMGP2310 (copy).PEF
    -rwxr-xr-x 1 wim wim    6068196 Jan 11  2011 IMGP2310.jpg
    -rwxr-xr-x 1 wim wim   10801944 Jan 11  2011 IMGP2310.PEF
    -rw-rw-r-- 1 wim wim 1024000000 Nov 30 16:05 sparse-file
    Step 3
    Check available diskspace after creating 1GB file
    Code:
    wim@i3-2120:/mnt/photos/wim$ du --max-depth=1 /mnt
    32	/mnt/boot-sav
    219602196	/mnt/photos
    219602232	/mnt
    wim@i3-2120:/mnt/photos/wim$ df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda5       138G  4,9G  126G   4% /
    udev            3,7G  4,0K  3,7G   1% /dev
    tmpfs           1,5G  856K  1,5G   1% /run
    none            5,0M     0  5,0M   0% /run/lock
    none            3,7G  216K  3,7G   1% /run/shm
    /dev/sda6       532G   14G  491G   3% /home
    /dev/sdc1       925G  210G  706G  23% /mnt/photos
    Note that the disk usage / free space did not change
    If you don't make backups of your important data, your data is obviously not important to you.

  8. #8
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    Re: 163 GB data at 4.7 GB DVD

    That screen shot appears to be from Windows, not Ubuntu. Am I missing something?

  9. #9
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    Re: 163 GB data at 4.7 GB DVD

    Quote Originally Posted by ramakanta View Post
    is it possible ?? if , then How.??
    Yes, it is possible

    Quote Originally Posted by pompel9 View Post
    No it is not possible.
    As proven above, it is possible to create a file that does not take space but is reported as 1GB.

    You can writes a utility that copies a normal file, next seeks behind the end of the copied data, write some more bytes and close the file.
    If you don't make backups of your important data, your data is obviously not important to you.

  10. #10
    Join Date
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    Post Re: 163 GB data at 4.7 GB DVD

    Quote Originally Posted by Wim Sturkenboom View Post
    Read up on sparse files

    Step 1
    Check diskspace before creating a 1GB file
    Code:
    wim@i3-2120:/mnt$ du --max-depth=1
    32    ./boot-sav
    219602196    ./photos
    219602232    .
    wim@i3-2120:/mnt$ df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda5       138G  4,9G  126G   4% /
    udev            3,7G  4,0K  3,7G   1% /dev
    tmpfs           1,5G  856K  1,5G   1% /run
    none            5,0M     0  5,0M   0% /run/lock
    none            3,7G  216K  3,7G   1% /run/shm
    /dev/sda6       532G   14G  491G   3% /home
    /dev/sdc1       925G  210G  706G  23% /mnt/photos
    Step 2
    Create a 1GB file
    Code:
    wim@i3-2120:/mnt$ cd photos/wim/
    wim@i3-2120:/mnt/photos/wim$ dd if=/dev/null of=sparse-file bs=1k seek=1000000 count=1
    0+0 records in
    0+0 records out
    0 bytes (0 B) copied, 2,112e-05 s, 0,0 kB/s
    wim@i3-2120:/mnt/photos/wim$ ls -l
    total 33016
    -rwxr-xr-x 1 wim wim    6068196 Jan 11  2011 IMGP2310 (copy).jpg
    -rwxr-xr-x 1 wim wim   10801944 Jan 11  2011 IMGP2310 (copy).PEF
    -rwxr-xr-x 1 wim wim    6068196 Jan 11  2011 IMGP2310.jpg
    -rwxr-xr-x 1 wim wim   10801944 Jan 11  2011 IMGP2310.PEF
    -rw-rw-r-- 1 wim wim 1024000000 Nov 30 16:05 sparse-file
    Step 3
    Check available diskspace after creating 1GB file
    Code:
    wim@i3-2120:/mnt/photos/wim$ du --max-depth=1 /mnt
    32    /mnt/boot-sav
    219602196    /mnt/photos
    219602232    /mnt
    wim@i3-2120:/mnt/photos/wim$ df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda5       138G  4,9G  126G   4% /
    udev            3,7G  4,0K  3,7G   1% /dev
    tmpfs           1,5G  856K  1,5G   1% /run
    none            5,0M     0  5,0M   0% /run/lock
    none            3,7G  216K  3,7G   1% /run/shm
    /dev/sda6       532G   14G  491G   3% /home
    /dev/sdc1       925G  210G  706G  23% /mnt/photos
    Note that the disk usage / free space did not change

    what does it mean . please explain with details . i am not export in programme.
    thank you.

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