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I tried mounting the ext4 partition as root, but it didn't work. My phone is rooted, but as it seems no one has managed to do what I want to do. I couldn't find any solution, that worked for me. How can I mount the ext4 partition?

What I have tried so far:

  1. Manually mounting the partition. I tried running mount -t ext4 /dev/block/sda2 /mnt/media_rw/usbotg, but that doesn't work and outputs mount: '/dev/block/sda2'->'/mnt/media_rw/usbotg': Invalid argument. I was trying this, because of this answer - https://android.stackexchange.com/a/220020.

  2. I also tried using vold-posix, but for some reason Magisk fails to install the module and shows Unable to unpack boot image, even though it is able to install Magisk updates on the boot image.

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  • Please tell us explicitly what have you tried so far. And how it did not work for you. What error are you getting? What are you trying to achieve?
    – Irfan Latif
    Jul 12 at 13:10
  • @IrfanLatif I added additional information.
    – RadoslavL
    Jul 12 at 17:22
  • Invalid argument is a general error. Run strace mount to get detailed log.
    – Irfan Latif
    Jul 13 at 8:28
  • @IrfanLatif I couldn't copy everything, but here are the last lines, that I think might be relevant - pastebin.com/CS2FE1xS. (65F0-14E9 is my SD card)
    – RadoslavL
    Jul 13 at 8:50
  • I meant strace mount -t ext4 /dev/block/sda2 /mnt/media_rw/usbotg. Syscall tracing of the failing command.
    – Irfan Latif
    Jul 13 at 10:33

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