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On 26/03/17 14:25, tuxic@××××××.de wrote: |
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> On 03/26 05:50, tuxic@××××××.de wrote: |
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>> On 03/26 11:21, Adam Carter wrote: |
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>>> Step 1: dd the contents into an image |
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>>> |
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>>> ddrescue is probably a better option than plain dd. |
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>>> |
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>>> step 2: put the sdcard to one side. |
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>>>> step 3: loopback mount a copy of the image (not the original) |
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>>>> step 4: try recovering the filesystem on the loopback, if it fails ... try |
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>>>> something else on another image copy |
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>>> |
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>>> |
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>>> Yep, once you've got the image mounted loopback, you can run |
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>>> testdisk/photorec depending on how bad it is. |
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>> |
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>> Hi all, |
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>> |
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>> thanks a lot for all help! :) |
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>> |
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>> Currently I am ddresucueing the flashcard to the harddisc. |
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>> Next I will try to mount the sdcard. |
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>> |
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>> What reliable sdcard-reader can one recommend ? |
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>> (...sorry if this sentence sounds harsh...I it by no means meant |
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>> that way...I am no native speaker... :) |
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>> |
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>> Cheers |
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>> Meino |
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>> |
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>> |
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> |
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> Hi, |
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> |
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> Is the assumption correct, that -- if ddrescue could read each |
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> partitions of the sdcard without stuttering, retries and errors -- |
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> the sdcard itsself is ok and "only" the logical structure |
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> (fs, superblock etc) got damaged? |
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> Or do I overlook something? |
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> |
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> (Background: I dont want to put a sdcard into the bin, if |
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> fdisking & reformatting that beast would gives me back an ok |
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> media...) |
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> |
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> Cheers |
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> Meino |
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> |
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> |
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> |
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> |
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|
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The dd gets you the best chance to work on the data before it completely |
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fails. In my experience the sdcard will only get worse ending with |
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total failure - if it hasn't already. |
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|
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If the dd dump comes up rubbish and cant be recovered, the actual sdcard |
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will be worse. You can run "strings" against the image to see if there |
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is any text in there (or even cat the /dev/sdcard node through strings) |
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to see if the bits are still there. |
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|
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I dont know of a cdparanoia type recovery utility for sdcards but I |
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suspect sdcard design means that approach wont work. |
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|
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BillK |
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