[WARNING][INFO] Before unlocking/flashing BACKUP TA PARTITION!

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By vinokirk, Senior Member on 1st September 2013, 03:24 PM
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<<<<<<INFORMATION>>>>>>
This should be the first procedure you undertake on your Xperia ZU.

The TA partition contains all your DRM keys for the Bravia/X-Reality Engine.

The first time you mess with your phone by unlocking the bootloader, these DRM keys will be deleted!

Before you mess with your phone in any capacity, you must make a backup of these DRM keys, or you may loose them forever.

<<<<<<HOW TO>>>>>>
There are a couple of ways to acheive this. Number one is the prefered choice.

1.
http://forum.xda-developers.com/show....php?t=2292598 (Please read the whole thread. The following is just an extract.) (Credit to DevShaft)

Quote:
Originally Posted by DevShaft

Backup TA for Sony Xperia

Backup TA can backup and restore the TA partition of the device. When you create a backup before unlocking for the first time, then you will be able to restore to full factory state (including a locked bootloader). This means all DRM keys intact, Bravia Engine working in Album and last but not least your warranty when needed .

READ: At the bottom of this post is the FAQ. Here you will find answers on the most asked questions. Read them before posting any question in this thread. When you post a question which is already answered in the FAQ, I will ignore you and smile .
Also when you want my support, tell me which device and version of Backup TA you're using and attach the complete output. I can not help you without this and besides it's really not so much to ask in return, now is it? No effort without effort.

This tool only works under Windows. Mac and Linux will not be supported. Using this tool is at your own risk.

Download
Changelog
Source (released under MIT license)

Stable releases do have a version tag like this: v1.0 (example)
Beta releases do have a version tag like this: v1.0b2 (example).

SUPPORTED DEVICES
Confirmed:
Sony Xperia Z Ultra

....
GUIDE
1. Download the latest version of Backup TA.
2. Extract the ZIP file to a folder location of your choosing.
3. Navigate to the folder location of Backup TA.
4. Make sure no other script or application which is using ADB is running.
5. Make sure the device is booted in normal mode, the way you normally use it.
6. Run Backup-TA.bat
7. Read the license.
8. Choose one of the menu options.
9. Follow the instructions given by the tool.
FAQ
Q: Is my device supported?
A: Look at the supported devices list above this FAQ. When it is not listed, try to make a backup it will tell you if your device is supported.



2.
http://forum.xda-developers.com/show....php?t=2428319 (Please read the whole thread. The following is just an extract.) (Credit to krabappel2548)

Quote:
Originally Posted by krabappel2548

== Backup TA partition ==
Backing up your TA partition will give you a backup of your locked device with DRM keys for Bravia/X-Reality Engine

- To be able to backup your TA partition you need to switch to the "pro mode" in FlashTool
- Open file menu and click "switch pro"



- After this you should have a new menu option available called "advanced"
- To backup your TA click "Advanced => Trim Area => S1 => Backup:


- Connect your device in Flash mode to backup TA
- Select your device by doubkle clicking on it in the list:


- Wait until Flashtool is finished

Please note:
Quote:
Originally Posted by Bin4ry

Big FAT note here!
Backup TA with S1-Mode will NOT Backup DRM-Keys, only in RAW mode DRM-Keys will be read from device!

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1st September 2013, 03:42 PM |#2  
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I did not do this process when I unlocked my bootloader 4 weeks ago, it did not exist. Now I am using firmware .510 and in Settings --> Display --> X-Reality for Mobile I can check/un-check the option with no problem, but clearly my DRM information is gone, so why am I able to do it?, thanks
1st September 2013, 03:48 PM |#3  
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Things may have changed in 510.
Someone will be along soon to answer your question.
2nd September 2013, 09:10 AM |#4  
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Quote:
Originally Posted by brosenz

I did not do this process when I unlocked my bootloader 4 weeks ago, it did not exist. Now I am using firmware .510 and in Settings --> Display --> X-Reality for Mobile I can check/un-check the option with no problem, but clearly my DRM information is gone, so why am I able to do it?, thanks

The settings will always stay there, X-Reality just won't have any effect anymore without DRM keys

Sent from my C6603 using xda app-developers app
2nd September 2013, 11:15 AM |#5  
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I was wondering if a mod could make this sticky?
If flashers see this thread before starting, it could save a lot of hassle!
2nd September 2013, 12:47 PM |#6  
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Quote:
Originally Posted by vinokirk

I was wondering if a mod could make this sticky?
If flashers see this thread before starting, it could save a lot of hassle!

I've sent a report to a mod now, asking if (s)he can sticky it
4th September 2013, 01:26 AM |#7  
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Quote:
Originally Posted by vinokirk

<<<<<<INFORMATION>>>>>>
This should be the first procedure you undertake on your Xperia ZU.

The TA partition contains all your DRM keys for the Bravia/X-Reality Engine.

The first time you mess with your phone by unlocking the bootloader, these DRM keys will be deleted!

Before you mess with your phone in any capacity, you must make a backup of these DRM keys, or you may loose them forever.

<<<<<<HOW TO>>>>>>
There are a couple of ways to acheive this. Number one is the prefered choice.

1.
http://forum.xda-developers.com/show....php?t=2292598 (Please read the whole thread. The following is just an extract.) (Credit to DevShaft)




2.
http://forum.xda-developers.com/show....php?t=2428319 (Please read the whole thread. The following is just an extract.) (Credit to krabappel2548)



Please note:

I didn't unlock the boatloader, but I did flash the .510 update... would this have also deleated my DRM keys?
4th September 2013, 07:12 AM |#8  
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If you flashed the official firmware then your DRM keys will be safe
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4th September 2013, 12:32 PM |#9  
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God,I had unlock without backing up ta!
4th September 2013, 04:11 PM |#10  
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i already root my XZU using vroot,
then i check for boot loader status and the result is :
"Bootloader unlock allowed - Yes"

But i want to make sure again,
is there any way to check that DRM Keys is not deleted ?

Thanks in advance.
4th September 2013, 08:59 PM |#11  
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That's just saying that you have the possibility to unlock your bootloader. It's not saying that your bootloader is actually unlocked. So your keys should be safe.
Back them up now!
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