How to Fix Invalid Ext4 Image Error in Odin

How to Fix Invalid Ext4 Image Error in Odin

If you own a Samsung Galaxy smartphone or tablet then you might have also used Odin. Odin is a must have tool if you want to flash stock firmware or flash a custom recovery or Chainfire’s Auto-root package. To install any file with .tar or .tar.md5 extension you have to use Odin. Most of the time, installing a firmware, custom recovery or root package goes successful, but sometimes we get unexpected results.

We all love to see the big green PASS! message on Odin screen but have you ever had encountered red signal with Fail message? Failed installation does not always affect the functioning of the device but sometimes, a failed attempt either bricks the device or puts it in an abnormal boot state. And it all depends on the type failure occurred during installation which you have encountered in Odin.

Today we will see how to fix “invalid ext4 image” error that might occur while flashing the stock firmware on Samsung Galaxy devices. “Invalid Ext4 Image” error can be found by attempting to install a firmware using Odin with a downgraded/upgraded bootloader to the one currently installed on a device.

So, before fixing “Invalid Ext4 Image” error, let’s take a look at EXT4 to know what exactly it is!

Also see: How to Create, Analyze, and Edit PIT Files using PIT Magic

EXT4(fourth extended file system)

EXT4 is a file format for Linux that aims at extending the limit of the storage and bring improvement in performance to the Linux kernel based devices. Android uses EXT4 storage infrastructure as the default file system, as Android is also based on Linux kernel. In 2008 when Google launched first Android OS it used EXT2, later in 2010 Google decided to upgrade its file storage system to EXT4.

How to Fix Invalid Ext4 Image Error in Odin

As we know that “Invalid Ext4 Image” error is linked with device storage partition, so it can be easily fixed by repartitioning the internal storage. This error often occurs while installing stock firmware on Samsung Galaxy devices that comes in various internal storage sizes i.e. 8GB, 16GB, 32GB, 64GB, etc.

The assigned system partitions on Android devices are depending on the internal storage. And when we flash any firmware on device, sometimes we have to provide the PIT file that instructs the firmware to allocate the storage partitions according to the PIT provided partition map.

On other than Samsung device, sometimes the result of wrong partitioning reduces the internal storage size to half. Like, if you own a device with internal storage of 16GB, it might show only 8GB space after installing a firmware. I have also encountered the same issue many times on my non-Samsung devices.

So, you will need to get a PIT file because it’s a must have in order to resolve “Invalid Ext4 Image” issue on your Galaxy phone or tablet. There are various Android forums on which you can find your required PIT file. You can also take help of this useful Heimdall tool to pull PIT out manually from your device.

Make sure that the compatibility of the PIT file with device must be accordingly to model number and storage capacity of the device. Suppose if you have a Galaxy Note 3 SM-N9005 (32GB), i.e. the PIT file must be from the same model number with same storage space.

Grab the PIT for your Device:

How to Extract PIT File from Samsung Galaxy Devices

Flashing Stock Firmware and PIT File

As we have mentioned it before that “Invalid Ext4 Image” error can be fixed through device repartitioning. Repartitioning basically tell the firmware that your device is a 16/32/64 GB variant. Just grab the correct PIT file for your device model, extract it and then simply install it along with the firmware file. The procedure is not different as compare to normal flash with Odin but you have to add the PIT file too.

  • First download the firmware file for flashing.
  • If the downloaded Odin file is in zip format then use WinZip, WinRAR, 7-Zip or any other unzip tool to extract it.
  • Turn on device USB debugging mode from Settings >> Developer options. If your device is unable to boot then skip this step.
  • Backup your device data, apps, contacts and media.
  • Charge your phone battery to maximum level or at least to 70%.
  • Switch off the device and boot it into the Download Mode. In case your device stuck in a bootloop, long press the Power key until device powers off, alternatively pull out the battery of the device and then reinsert it after 30 seconds.
  • To get into the Download Mode, press and hold the Volume-Down+Home+Power buttons at the same time for 3-4 seconds.
  • When you see the yellow triangle sign warning message, just press the Volume-Up key.
  • Browse Odin folder and open the tool by double-clicking on the file with .exe extension.
  • By using stock USB cable connect your device to PC.
  •  “Added!!” message will appear on Odin.
  • If “Added!!” message does not appear on Odin then try to re-install the drivers, turn on the USB Debugging or try an alternate USB port and restart the PC.
  • Click on the PIT button on Odin to browse and select .pit file.
  • Click on the PDA/AP button on Odin to add the firmware file.
  • Check/tick all three options “Auto Reboot”, “Re-Partition”, ”F. Reset Time”.
  • Now press the Start button in Odin to proceed with installation.

Flashing Stock Firmware and PIT File

  • The process of installation should start now.
  • Just wait for ID:COM port to turn into green with PASS! message.
  • Then your Galaxy device will reboot automatically.
  • It may take 4-7 minutes to boot normally so be patient.

Just in case if your device does not get past the Samsung boot logo animation even after 10 minutes then try a data/factory reset option from the stock recovery menu.

If you don’t know how to perform data/factory reset, then read the following tutorial:

How to Perform Data/Factory Reset on Samsung Galaxy Devices

So, now you know how to fix “Invalid Ext4 Image” error in Odin while flashing stock firmware on Galaxy devices. For further queries or to share your experience please use the comment section below.

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