[XDA-University] majdinj:
Use:

The main purpose is to make a file that contains all data in android specific partition. This is really handy in case of dumping leak firmwares.

Pr-requirement:

- Rooted device.

- Knowledge of how to use adb or Terminal Emulator.

The first step of making dump files out of device partitions is to locate its mounting points..!!

So in our tutorial, we will make it in 2 sections. Section 1 for how to get mounting points, and section 2 for how to get partition dumped..

Keep in mind that this is xda-university; so my target is to show beginners how to do that manually, without the aid of any tool, so they can get the concept behind it.. OK let's begin..!!

Section 1:

Getting mounting points​

There are several methods to achieve this, but we will discuss the easiest methods that give efficient information about the partition that you want to know its mounting point.

All these methods will be described using adb shell.

Way #1

adb shell
cat /proc/partitions

This one needs from you to figure out which block belong to which partition name.!!

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Way #2

adb shell
ls -al /dev/block/platform/[B][COLOR="Blue"]dw_mmc[/COLOR][/B]/by-name

This one will give you info about the dev block names WITH their familiar names (i.e, boot, recovery, system... etc)

​

This command is not universal between devices, and you will need to gather its pieces (/dev/block/platform/dw_mmc/by-name).

How?

- In your device, use any explorer that can get you to the device root (personally I use ES Explorer, by pressing on "/" on navigation bar).

- Go to "/dev/block/platform/" folder

- Here you will see some files and folders, we need to open folders and search for the folder called "by-name" inside one of them; in my situation it was "dw_mmc" folder which has the folder "by-name" inside it.

- At the end, my targeted piece info will be (/dev/block/platform/dw_mmc/by-name)

- Now open adb shell and put that command..

Way #3

By pushing parted binary to /system/bin folder and run it (you can find it in attachment).

adb remount
adb shell "su" "" "mount -o remount,rw /system"
adb push parted /system/bin/parted
adb shell
chmod 0755 /system/bin/parted
parted /dev/block/[B][COLOR="Blue"]mmcblk0[/COLOR][/B]
print

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Here, your mounting points will start with /dev/block/mmcblk0p* where (*) is the number shown in the table above for each partition.

example:

The hidden partition mounting point will be mmcblk0p10

The radio partition mounting point will be mmcblk0p7

The system partition mounting point will be mmcblk0p9

The recovery partition mounting point will be mmcblk0p6

and so on

Don't forget to "quit" the parted action after grasping your device mounting points.

N.B:

- You may need to run first:

adb shell
cat /proc/partitions

to know what is the initial name for your device partition.. In the example above, it was mmcblk0.

​

- Also to be able to do adb push to /system partition for parted binary, you will need insecure boot.img used in your ROM or adbd insecure installed in your device (Check this thread for that app), or just push parted binary manually by any root explorer and then fix permissions to rwxr-xr-x (755).

***​

Section 2:

Dumping ROM partition​

After locating the mounting point of the partition you want to dump, open adb shell command prompt and type:

adb shell
su
dd if=[B][COLOR="Blue"]/yourMountingPoint[/COLOR][/B] of=[B][COLOR="Green"]/yourDestination[/COLOR][COLOR="Red"]/partitionType[/COLOR][/B]

Let's say I want to take a dump out of system partition from above example. So the adb commands will be:

adb shell
su
dd if=[B][COLOR="Blue"]/dev/block/mmcblk0p9[/COLOR][/B] of=[B][COLOR="Green"]/sdcard[/COLOR][COLOR="Red"]/system.img[/COLOR][/B]

This may take a while to complete the dumping process, depending on the size of your dumped partition; so be patient..

Note:

If the partition is formatted as ext3/4 then the dumped partition will have .img as an extension.

Other partition dumps have different extensions; examples:

radio.bin

param.lfs

Sbl.bin

zImage (without extension)

***​

Optional:

Read Partition Image​

After dumping an image from android partition, you can mount it to extract a particular file for sharing, or the whole dump content in case the ROM chief wants to make a ROM out of dump files..

For Linux Users:

- Open terminal and type:

su -
mkdir -p /mnt/disk
mount -o loop [B][COLOR="Red"]yourImage.img[/COLOR][/B] /mnt/disk
cd /mnt/disk
ls -l

For Windows Users:

- Download LinuxReader from this site here.

- Open it -> Drives -> Mount Image -> Then choose your dumped image and hit Mount. A new driver will appear that contains all files inside the dumped image called "Linux native Volume 1". Just double click it to get inside the dumped image.

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I hope you will find this tutorial beneficial,,,

Yours;