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Thread: dd stuck trying to recover a dead disk

  1. #1
    Join Date
    Dec 2011
    Beans
    4

    dd stuck trying to recover a dead disk

    Hi,

    lost a disk, trying to recover it by using dd, and hopefully being able to repair the partition on a new disk.

    The disk is an iOmega external USB, have tried to dismantle it to make it internal to have a better control of the disk (like 'SMART ctl'...) but it is welded.

    Run command:

    after some internet research, decide to try:

    sudo dd if=/dev/sdc of=/media/temp/oldHD conv=noerror,sync bs=32M

    dd gets stuck on byte 2583691264:

    Code:
    laptop:~$ sudo dd  if=/dev/sdc of=/media/temp/oldHD  conv=noerror,sync bs=32M 
    dd: reading `/dev/sdc': Input/output error
    76+1 records in
    77+0 records out
    2583691264 bytes (2.6 GB) copied, 152.213 s, 17.0 MB/s
    dd: reading `/dev/sdc': Input/output error
    76+1 records in
    77+0 records out
    2583691264 bytes (2.6 GB) copied, 152.544 s, 16.9 MB/s
    dd: reading `/dev/sdc': Input/output error
    76+1 records in
    77+0 records out
    2583691264 bytes (2.6 GB) copied, 152.696 s, 16.9 MB/s
    dd: reading `/dev/sdc': Input/output error
    76+1 records in
    77+0 records out
    20 minutes later, stuck in the same byte

    Code:
    2583691264 bytes (2.6 GB) copied, 1117.79 s, 2.3 MB/s
    76+1 records in
    77+0 records out

    the resulting image has not grown a byte.


    Have I misplaced the 'conv' dd options?

    some ideas?


    thanks!
    Last edited by vilman; June 12th, 2013 at 08:32 PM. Reason: Adding important info

  2. #2
    Join Date
    Nov 2007
    Location
    London, England
    Beans
    5,520
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: dd stuck trying to recover a dead disk

    I have heard of this, but not needed to use it. There is a package gddrescue in the Ubuntu repositories. It may be worth a shot.
    http://www.gnu.org/software/ddrescue...ue_manual.html

  3. #3
    Join Date
    Dec 2011
    Beans
    4

    Re: dd stuck trying to recover a dead disk

    Cool! this one at least does not gets stuck. I'll go deep into that, and post some update.

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