Fix Nand chip recognize

Discussion in 'C8 How to fix/ Problems' started by Tuen, Dec 3, 2011.

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  1. Tuen

    Tuen Staff Member Administrator

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    You need this files
    http://www.mediafire.com/?7r7obgbo23nw1ka
    Be sure that the name is the same as your firmware version. (if not, just rename it correctly)
    e.g. "data_4g.dat" was on CFW 1012 but in CFW 0927 it called "4g.dat"

    The files are located in the root of the firmware or in a folder like "mbr", "update/mbr"
    With this file it will recognize your nand memory and it should also correct your partition size.

    For question you can ask here
    This fix had been used in ModTuen_V3
     
  2. Tron

    Tron Member

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    I got only an internal 2gb card :( Would you pls release a 2gb mbr? :) thanks
     
  3. Tuen

    Tuen Staff Member Administrator

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    what kind of tablet do you have? normally the minimum of herotab should be 4gb xD
     
  4. Tron

    Tron Member

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    well... you r right... system mounted just a part of the card with genesis o_O
     
  5. Tuen

    Tuen Staff Member Administrator

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    if you have a 4GB sdcard, there is a partition for the system OS and some space (around 2GB) for SD storage
     
  6. Guver

    Guver Member

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    I have a Dropad with Internal 4GB nand.
    So far I tried several CFW and OFW... all had some problems until I found Rubberband 2.1.1.
    This one worked perfectly... for 4 days in a row (the maximum so far).
    At one point I noticed my external SD card, which is labeled as 2 GB was detected as only 1 GB... not only on Dropad, but also in windows or any other portable device (Nokia running symbian and LG running LG OS).
    The problem with all the other Firmwares was now obvious, my external SD was breaking up, and the Firmwares were failing to install properly or the (Android) system folders simply disappeared, leading to hanging statuses.

    Now, the problem, seem somewhat different. With RubberBand I was able to boot. First I noticed my XLauncher was not working, and a lot of applications were missing, so I went to Settings -> Storage and noticed my internal NAND not recognized!!!!!!!
    Why, Why, WHY!!!!!?
     
  7. Guver

    Guver Member

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    BTW: I tried the fix above but I still have the same problem. This file is the same as the one shipped in RubberBand 2.1.1.
    NOTE: Just to clarify, it was working just fine until at some point the Internal NAND was not detected anymore...
     
  8. Tuen

    Tuen Staff Member Administrator

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    @guver
    Can you give me more information?
    so you tell me in settings --> storage, the internal NAND is not recognized?
    Do you have copy the whole files from the zip into your external SD (not some files ,but all the files)?
    It could also a faulty internal SD card? maybe that the reason that you have problem with other firmware?
     
  9. Guver

    Guver Member

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    Hi Tuen,

    Let me copy here what the Storage screen says:

    External SD
    Total Space: 1.01gb
    Available Space: 0.89gb

    Unmount SD Card: -
    Erase External SD Card: -

    Nand Memory
    Total Space: Unavailable
    Available Space: Unavailable

    Internal storage
    Available Space: 405 mb

    ----------------------------------
    I copied all the files from the zip except for the MacOS folder. Do I need that folder too?
    It could be a faulty internal SD card... hope not...

    Right now my device boots, from the external SD, but all the applications that were on the internal SD disappeared and are not detected.
     
  10. Tuen

    Tuen Staff Member Administrator

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    I'll give you permission in develop session and try Rubberband V2.1.2. I've use an another method to partition and hope it will fix this problem

    edit: normally you have now permission
    the new firmware has also include swap sdcard with external SD.
    Let me know the result on the topic self.
     
  11. Guver

    Guver Member

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    Hi, thanks a lot for the response and the access to the BETA.

    Now, do you think that this behavior is something that can occur? I mean it worked for 3 full days, and today it just broke...
    I can't imagine partitions disappearing in a hard disk, unless the HD is broken, of course.
     
  12. Tuen

    Tuen Staff Member Administrator

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    there could a lot of reasons why the data is corrupted.
    e.g.:
    - power interrupting while it was writing something on your chip
    - just a bad part of your chip
    - maybe bad downloaded image and flashed in your device
    -....
     
  13. Guver

    Guver Member

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    One thing I did notice is before this happened the Tablet shutted down itself because of Battery being at 0%. It wasn't shutted down by normal means... I assumed (probably bad on my part) that this should have lead to no issues... maybe I was mistaken...
     
  14. Guver

    Guver Member

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    I also tried OFW 1010 (Haipad). It goes to the upgrade screen and does it's job. But then it boots to the logo screen and that's it.
    I guess the thing is OFW 1010 doesn't have swap boot, so it tries to boot from NAND and fails...

    So probably NAND is dead. DAMN!
    I will have to send this back to the manufacturer in China...
     
  15. Guver

    Guver Member

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    This is crazy shit!
    While I was typing the previous message I gave Dropad one more chance... it came up!!!
    All of a sudden my NAND was recognized... and guess what... all my previous information is still there... WTF?! So I guess it was never formatted after all.

    Now in storage screen it shows:
    NAND Memory
    Total Space 2.44GB
    Available Space 1.64GB

    Internal Storage
    783MB
     
  16. Tuen

    Tuen Staff Member Administrator

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    The nand memory is your internal storage.
    internal storage is a SD-card.
     
  17. Guver

    Guver Member

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    Let's suppose my internal SD is broken somehow. If I run a CFW like Tsunamis that goes on the external SD... does it mean it will ignore the internal SD at boot time?
     
  18. Tuen

    Tuen Staff Member Administrator

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    Normally you still need the internal SD like swap memory, boot,.... Only the Android os could be on the external (if i'm not wrong)


    ps: if the internal SD is broken, you can self fix them by replace them.
     
  19. Guver

    Guver Member

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    So let's see if I can understand the filesystem.

    Once my tablet is up and running with Tsunami Firmware I open File Manager.

    I see the root folder: what is this? Is this the contents of the External SD Card?

    I also see extsd mount folder, right now completely empty. What would this be? Is this really the external SD?

    I see sdcard mounted too, 19 items on it. I think this is the External SD now.

    Another thing I noticed is that the CFW or the OFW fail to format my SDs properly. My 8 GB SD ended up having 6 GB after 3 flashes.
    I downloaded SD Formatter software and it went back to what it was supposed to.

    Is there any way to format the internal SD on the tablet without removing the back cover?
     
  20. Tuen

    Tuen Staff Member Administrator

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    After you install, you will see in file manager your internal sd (a partition of it) the folder sdcard can be a part of your internal sd or your sdcard ( depends how the firmware set the mounts)
     
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