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I have a Xiaomi Redmi 2, (device ID is 2014813) and there is a serious problem going on with it.

This morning I saw a message from the phone, saying that the full encryption was unsuccessful, and all my data is inaccessible now, so I have to do a factory reset. I booted up into recovery, tried to do a factory reset, but it said that it couldn't mount /data, /cache, and even /sdcard.

I tried flashing in fastboot with MiFlash, without any luck, it fails at setting up the partition table. ADB sideload works, but I can't do much with it, because even if I install a ROM with it, I can't boot that ROM up.

I NEVER wanted to do an encryption on this device, I don't know why did it do that.

  • That seems strange. Why would a device begin full disk encryption if a user didn't initiate it? Anyhow, when the device tells you that encryption is unsuccessful, does it provide an option to erase/reset the device? If yes, then did you try it? For example, in my Nexus 6, when I choose that option it boots into a certain screen where it shows "Erasing Data". It is different from stock recovery. May be your device also has such provision. – Firelord Mar 19 '16 at 16:58
  • Yes, there was a button, and that "sent" me to the recovery, but it didn't begin erasing by itself. Neither the recovery, nor the ROM was stock; I've used a CM12.1, with TWRP recovery. I know it's strange, I've never seen anything like that before. – Gabe Mar 19 '16 at 17:04
  • At first, I thought it's a bug, and I rebooted the phone. Then this "message" showed up again, and then I pressed that button, and I did a factory reset in the recovery. – Gabe Mar 19 '16 at 17:07
  • Try flashing a stock ROM that will have the partition info. – Matthew Read Mar 20 '16 at 2:17
  • I'm trying that since yesterday morning. I just type in: fastboot flash partition partition table file, and it always says: "FAILED (remote: failed to write partition)". I don't wanna give up on this device, I really liked it. – Gabe Mar 20 '16 at 10:18
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There are a couple ways to do this:

  1. Using adb

    create a folder named external_sd in /sdcard/ with your file manager

    Use this code in commamd prompt (adb) (to make this folder to mount sd card in /sdcard/):

su

    mount -o bind /mnt/emmc /sdcard/external_sd
  1. Alternatively via terminal (need busybox installed and root):

    busybox mount --bind /mnt/emmc /mnt/sdcard/external_sd (as su)

Credits

https://forum.xda-developers.com/showthread.php?t=1724278

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