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Thread: Recover data from CDROM (cannot mount it)

  1. #1
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    Aug 2008
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    Recover data from CDROM (cannot mount it)

    Hi, people.

    I have a couple of old CDROMs that I need to read the data from.

    The problem is that Ubuntu tries to auto mount the media and after a few seconds it recognizes the CD as a blank CD.

    Then I've tried
    Code:
    ddrescue -b 2048 --no-split /dev/cdrom rescue/ddrescueIMG ddrescueLOG
    (as seen here: http://www.forensicswiki.org/wiki/Ddrescue)

    I returns me
    Code:
    ddrescue: cannot open input file: No medium found
    if I run the above command while the system is trying to mount the CD. After it is (wrongly) identified as a blank CD, the above command executes for hours, saying:

    Code:
    Press Ctrl-C to interrupt
    Initial status (read from logfile)
    rescued:         0 B,  errsize:    4096 B,  errors:       1
    Current status
    rescued:         0 B,  errsize:    641 TB,  current rate:        0 B/s
       ipos:   641276 GB,   errors: 1195172050,    average rate:        0 B/s
       opos:   641276 GB
    note the "rescued: 0B".

    Please, what can I do to recover this CD?

    Thanks a lot!

  2. #2
    Join Date
    Dec 2008
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    Ubuntu 12.04 Precise Pangolin

    Re: Recover data from CDROM (cannot mount it)

    What is the data type on the CD? Were these made on the same machine? Have your tried to copy with an application such as K3B or Gnome Baker?
    EasyBCD.
    PrintersDatabase
    Boot Info Script: How to
    The post above and the post below suffer from the Rashomon effect!

  3. #3
    Join Date
    Sep 2008
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    Ubuntu 11.04 Natty Narwhal

    Re: Recover data from CDROM (cannot mount it)

    If the CD needs to be unmounted, do
    Code:
    sudo umount /dev/cdrom
    .

    But many CDROMs are not on /dev/cdrom. Can you post the output of
    Code:
    mount
    after the "blank" CD has been mounted? (Or you could look at the list yourself and find the listing that looks like a CDROM.)
    If at first you don't succeed, skydiving is definitely not for you.

  4. #4
    Join Date
    Nov 2009
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    598
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Recover data from CDROM (cannot mount it)

    Try Dvdisaster, its in the software center. It doesn't need a CD to be mounted to retrieve data off of it.
    - Justin Reno
    Need an easy way to store files publicly or even privately without hassle over the internet to be accessed anywhere? Try Dropbox. Use this link to get an extra 250MB of storage!

  5. #5
    Join Date
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    Re: Recover data from CDROM (cannot mount it)

    Quote Originally Posted by scorchgeek View Post
    If the CD needs to be unmounted, do
    Code:
    sudo umount /dev/cdrom
    .

    But many CDROMs are not on /dev/cdrom. Can you post the output of
    Code:
    mount
    after the "blank" CD has been mounted? (Or you could look at the list yourself and find the listing that looks like a CDROM.)
    Actually
    Code:
    eject -n
    will give more useful info
    EasyBCD.
    PrintersDatabase
    Boot Info Script: How to
    The post above and the post below suffer from the Rashomon effect!

  6. #6
    Join Date
    Sep 2008
    Location
    in front of my computer
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    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Recover data from CDROM (cannot mount it)

    Actually
    Code:
    eject -n
    will give more useful info
    Thanks, never heard of that. Do that instead.
    If at first you don't succeed, skydiving is definitely not for you.

  7. #7
    Join Date
    Aug 2008
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    Re: Recover data from CDROM (cannot mount it)

    Quote Originally Posted by jtarin View Post
    What is the data type on the CD? Were these made on the same machine? Have your tried to copy with an application such as K3B or Gnome Baker?
    The CD was burned in a Win (probably 98) machine. The data is mostly jpg and tiff images, with some Corel Draw and MP3 files, and even maybe some AVI and MPEG.

    Tried to copy it with Brasero with no joy. It tells me "No disk to copy" and considers it as a blank disk.

    K3B tells me "The source disk is empty" and finishes with error
    Code:
    System
    -----------------------
    K3b Version: 1.0.5
    
    KDE Version: 3.5.10
    QT Version:  3.3.8b
    Kernel:      2.6.28-19-generic
    Devices
    -----------------------
    TSSTcorp CD/DVDW TS-L632M 0A17 (/dev/sr0, ) [CD-R, CD-RW, CD-ROM, DVD-ROM, DVD-R, DVD-RW, DVD-R DL, DVD+R, DVD+RW, DVD+R DL] [DVD-ROM, DVD-R Sequential, DVD-R Dual Layer Sequential, DVD-R Dual Layer Jump, DVD-RAM, DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96P, SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Restricted Overwrite, Layer Jump]
    Thanks for your kind help, anyway.

  8. #8
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    Re: Recover data from CDROM (cannot mount it)

    Quote Originally Posted by scorchgeek View Post
    But many CDROMs are not on /dev/cdrom. Can you post the output of
    Code:
    mount
    after the "blank" CD has been mounted? (Or you could look at the list yourself and find the listing that looks like a CDROM.)
    Code:
    ..~/ > mount
    /dev/sda5 on / type ext3 (rw,relatime,errors=remount-ro)
    tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
    proc on /proc type proc (rw,noexec,nosuid,nodev)
    sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
    varrun on /var/run type tmpfs (rw,nosuid,mode=0755)
    varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
    udev on /dev type tmpfs (rw,mode=0755)
    tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
    devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
    fusectl on /sys/fs/fuse/connections type fusectl (rw)
    lrm on /lib/modules/2.6.28-19-generic/volatile type tmpfs (rw,mode=755)
    /dev/sda2 on /media/Outros type fuseblk (rw,nosuid,nodev,allow_other,blksize=4096)
    none on /proc/bus/usb type usbfs (rw,devgid=1001,devmode=666)
    securityfs on /sys/kernel/security type securityfs (rw)
    nfsd on /proc/fs/nfsd type nfsd (rw)
    binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
    gvfs-fuse-daemon on /home/daniel/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=daniel)
    Couldn't figure out which one is the CD

  9. #9
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    Re: Recover data from CDROM (cannot mount it)

    Quote Originally Posted by JustinR View Post
    Try Dvdisaster, its in the software center. It doesn't need a CD to be mounted to retrieve data off of it.
    As the dvdisaster's manual says: "So if you have a defective medium but never created ecc data for it - sorry, your data is probably lost." and "So if you have a defective medium but never created ecc data for it - sorry, your data is probably lost."

    Thanks for the try, anyway.

  10. #10
    Join Date
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    Re: Recover data from CDROM (cannot mount it)

    Your cdrom drive is /dev/sr0
    EasyBCD.
    PrintersDatabase
    Boot Info Script: How to
    The post above and the post below suffer from the Rashomon effect!

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