[Dual Boot][IDragon]How to Modify Any Rom or Resotre Backup to Dual Boot topic

The Best thing about this Dual Boot System you can Restore your Old backups as Second Rom :D

Before you do this make sure you have Done the System Partition and External SD Card Partition of Dual Boot to the Red Color Line by http://forum.xda-developers.com/redm...mi-1s-t3034770 this Post.
No need to download CM 12 Dual Boot.zip for this tutorial...

Heres How to make Any Custom Rom as Second Rom

What you need

• Android Kichen


• Windows PC


• WinRar
  


• Brain
  

Files you need

• Android Kitchen - http://d-h.st/JkKK


• System Change 1.zip - http://d-h.st/gSM4


• System Change 2.zip - http://d-h.st/Ubdi

What there was Included

• Edit Updater Script


• Edit boot.img


• Repack Extracted Rom Folder


• Modify System Change 1.zip


• How to Flash


• How to Restore a Backup as Second Rom
  

Step One :-

Edit Updater Script
Extract the rom zip. Go to META-INF > com > google > android >
Open "updater-script" using notepad++. Change the System path and Userdata path
System =
mount("ext4", "EMMC", "/dev/block/platform/msm_sdcc.1/by-name/system", "/system");
To
mount("ext4", "EMMC", "/dev/block/mmcblk0p30", "/system");

Data =
mount("ext4", "EMMC", "/dev/block/platform/msm_sdcc.1/by-name/userdata", "/data");
to
mount("ext4", "EMMC", "/dev/block/mmcblk1p2", "/data");

Example -- From

To


Now Save it.

Step Two :-

Edit boot.img
Download Android Kitchen and Extract it... Then copy the boot.img file to that folder


Now Drag and Drop the boot.img to unpackimg.bat


You will see the unpack completed


Now you will get ramdisk folder. Go to that folder. And open "fstab.qcom' using notepad++


Change the Partition Paths as New Partition Table...
system = mmcblk0p30
data = mmcblk1p2
cache = mmcblk1p3

Example -- From


To


Save it and Now double click on "repackimg.bat. And you will see the completed msg...



You will see the new img file called "image-new.img.


Step Three

Repack Extracted Rom Folder
Copy it to the Extracted Rom Folder Delete the old boot.img. Rename "image-new.img" to "boot.img"


Select Folders and Files and click on Add to Archive


Select Zip option and Other settings as the screenshot. And Press OK


Wait Until finish. After completed you will see the new zip file...



Copy it to your External SD card.

Step Four

Modify System Change 1.zip
Download "System Change 1.zip". Open it using WinRar Go to files folder. Get newly Created boot.img and Rename it to "boot2.img"and Drag and Drop "boot2.img" to the WinRar as Screenshot and Press OK.


Step Five
How to Flash
Copy System Change 1.zip Go to your TWRP recovery Mode. and Flash System Change 1.zip
Reboot to your system and Click on System Change App and Press Switching.
Your device will Reboot... Now after your device booted go to Recovery Mode again by Pressing Power Button + Volume Up Button...
Now you will See the TWRP Second Rom Recovery Mode.
Now wipe cache, dalvik cache, data, system and Flash newly created Rom zip file by Step Three.
Reboot your Device and will boot Second Rom. So first boot will take little while to boot.
Now boot into Recovery again and Flash System Change 2.zip.
Reboot to system. To Change the system Go to System Change App open it and Click Switching.

How to Restore a Backup as Second Rom
Just Follow only the Step Two And Step Four.
Copy the "System Change 1.zip" (Modified by Step Four) and "System Change 2.zip" to your SD card.
Go to your Recovery Mode and Flash "System Change 1.zip"
Reboot to your System and Open "System Change App" and Click "Switching"
Now device will Reboots in to TWRP Second Rom Recovery Mode.
Then Restore your Backup. But Do not Restore boot. Untick the boot when restore.
After Completed Flash "System Change 2.zip'. Reboot.
You can Change System by opening System Change App and Pressing Switching

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Credits

• Nishantha Indika


• xuelongqy


• Sudeep Duhoon