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I am trying to wipe the cache partition of a Samsung Tablet GT-P5100 which does not start the Android operating system any more. Only the Samsung logo is displayed before it starts over.

Therefore, I launched the recovery mode and selected the menu entry wipe cache partition as shown on the first photo:

Recovery menu

When I press the power button the Erasing ... starts as shown on the second photo:

Erasing starts

Right after, the erasing is stopped by an error as shown on the third photo:

Erasing errors

Finally, an Error! stops the process as shown on the fourth photo:

Error

Immediately, the device restarts.

What is going wrong?

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Unlock bootloader (WARNING - Factory Reset!)
assuming you have already installed usb-drivers and fastboot.exe

  • press Power button until your tablet is off
  • press and hold together Volume Down + Power button
  • Press Volume Up to enter Download mode
  • connect USB cable to PC
  • then type from cmd.exe in fastboot directory

    fastboot oem unlock

  • if your bootloader is unlocked you can delete cache from fastboot

    fastboot format:ext4 cache

TWRP is available for your device, you can boot it and wipe cache

  • download twrp-2.8.5.0-p5100.tar
  • unpack recovery.img with 7-zip to fastboot directory
  • boot into twrp without flashing it

    fastboot boot recovery.img

  • check the TWRP Menu / Advanced / Wipe

  • Thank you for your hint. I did not have a look at TWRP yet. I will read through, check it out and let you know if it worked for me. – JJD Apr 17 at 19:13

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