Coby Kyros MID 1125-4G: Damaged NAND

Discussion in 'Coby Generation 2' started by russjorosa, Feb 16, 2012.

  1. russjorosa

    russjorosa Member

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    Tablet / Device:
    Coby Kyros MID1125
    Hello,

    I used the FWDN_V7_v2.13.exe program to re-load my MID1125. I also used it to create the NAND Data.fai and loaded that as well.

    After everything was loaded and it booted, however it keeps telling me I have "Damaged NAND memory".

    I read on another thread that NAND memory is shipped with known bad blocks.

    Is there a way to reset detect and set what the bad blocks are.

    I saw another post about mtty, but that was for an HTC device. MTTY does not see my device.

    Thanks for your attention and any help you can provide.


    It looks like my NAND does have bad blocks, I detemined this by the following procedure...

    I unmounted Nand.

    I then use the adb shell command, become super user (SU), and run the fsdk_msdos on /dev/block/vold/240:1.

    It runs and finds that a block is not free, and I enter Y to fix.

    # fsck_msdos /dev/block/vold/240:1
    fsck_msdos /dev/block/vold/240:1
    ** /dev/block/vold/240:1
    ** Phase 1 - Read and Compare FATs
    Attempting to allocate 3154 KB for FAT
    Attempting to allocate 3154 KB for FAT
    ** Phase 2 - Check Cluster Chains
    ** Phase 3 - Checking Directories
    ** Phase 4 - Checking for Lost Files
    Next free cluster in FSInfo block (467) not free
    Fix? [yn] y
    y
    84 files, 3227632 free (806908 clusters)


    I then re-run fsdk_msdos and no errors are found.
    # fsck_msdos /dev/block/vold/240:1
    fsck_msdos /dev/block/vold/240:1
    ** /dev/block/vold/240:1
    ** Phase 1 - Read and Compare FATs
    Attempting to allocate 3154 KB for FAT
    Attempting to allocate 3154 KB for FAT
    ** Phase 2 - Check Cluster Chains
    ** Phase 3 - Checking Directories
    ** Phase 4 - Checking for Lost Files
    84 files, 3227632 free (806908 clusters)


    I then mount the Nand and the error "Damaged NAND memory" appears again.

    I unmount Nand again and run fsdk_msdos, it finds a different block is not free.
    # fsck_msdos /dev/block/vold/240:1
    fsck_msdos /dev/block/vold/240:1
    ** /dev/block/vold/240:1
    ** Phase 1 - Read and Compare FATs
    Attempting to allocate 3154 KB for FAT
    Attempting to allocate 3154 KB for FAT
    ** Phase 2 - Check Cluster Chains
    ** Phase 3 - Checking Directories
    ** Phase 4 - Checking for Lost Files
    Next free cluster in FSInfo block (471) not free
    Fix? [yn]


    The cycle keeps repeating, I Unmount, fix it, Mount Nand and the error keeps comping back.

     
  2. Dunkelwerker

    Dunkelwerker Member

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    Location:
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    Tablet / Device:
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    Have you found a Solution ? Same Problem here :confused:
     

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