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Ubifs mtd update problem

Keldy
Expert 1835 points

Hi

I'm using AM335x with linux PSP04.06.00.07sdk, i boot from NAND flash using ubifs file system, and my ubifs file system also mount on NAND flash. Now i facing a file system update problem.

i use the following command to update my NAND flash, (http://processors.wiki.ti.com/index.php/UBIFS_Support), but my system crash after i erase my file system.

flash_eraseall /dev/mtd7 

ubiformat /dev/mtd7 -f ubi.img -s 512 -O 2048 

ubiattach /dev/ubi_ctrl -m 7 -O 2048 

mount -t ubifs ubi0:rootfs /media/card

How i update my ubifs file system while i booting from the file system itself ?

Thanks and Regards

Keldy  

  • 0
    TI__Guru**** 155141 points

    I am not a NAND expert, but in general, you cannot update the file system on the device which is currently mounted as the active filesystem. It is like you cannot format c: drive while Windows is running in normal mode.

    Where did you get the instruction which you did above?

  • 0 in reply to Bin Liu
    Expert 1835 points

    hi,

    i get the instructions from the link http://processors.wiki.ti.com/index.php/UBIFS_Support.

     if i boot file system over network, i can use the commands to flash my ubifs file system successfully.

    any other method to do the file system update?

    Thanks and Regards

    Keldy 

  • 0 in reply to Keldy
    TI__Intellectual 805 points

    Hi,

    If you boot from SD card, you'll be able to flash rootfs to Nand.

    You can also flash ubifs file system from Uboot. Check the below wiki.

    http://processors.wiki.ti.com/index.php/UBIFS_Support#Flashing_UBIFS_image_to_a_NAND_partition

    Regards,

    Yan

  • 0 in reply to Keldy
    TI__Guru**** 155141 points

    Keldy said:

    any other method to do the file system update?

    No matter what method you use, you are simply unable to update the root filesystem on the device currently mounted as root filesystem.

    You have to boot from a device different from the one you are going to update, for example, from NFS, SD card, or a different NAND partition.