[HOWTO]Do a backup of your current kernel and use it for recovery

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This is a new device and the development is starting quickly. Many user that haven't the device is starting to develop some stuff for it also if they don't have the phone ( like me ).

Kernel testing can cause softbrick that can be easy fixed flashing again the stock kernel. The following steps explain how to do a backup of your current kernel so you can use it to restore your device.

It's a very simple guide.....

IMPORTANT You need to use adb ( also terminal emulator is good) and you need to be root!

su
dd if=/dev/block/bml7 of=/sdcard/boot.img
tar cvf /sdcard/kernel-backup.tar /sdcard/boot.img

IMPORTANT: Write the commands exactly like i wrote and put attention that in the second command. I wrote "BML7" not "BM17" but you have to write without capital letter so "bml7" OK?

After this you'll have a file called kernel-backup.tar in your SDcard. Save it and, in case of softbrick testing a new kernel, put your phone in download mode and flash it with odin (PDA field).

Wish this can help you...

Bye

I got

su
# dd if=/dev/block/bml7 of=/sdcard/boot.img
dd if=/dev/block/bml7 of=/sdcard/boot.img
# tar cvf /sdcard/kernel-backup.tar /sdcard/boot.img
tar cvf /sdcard/kernel-backup.tar /sdcard/boot.img
tar: removing leading '/' from member names
sdcard/boot.img
#

Nvm.. my bad :P

Originally Posted by noobwithgalaxyy

I got

su
# dd if=/dev/block/bml7 of=/sdcard/boot.img
dd if=/dev/block/bml7 of=/sdcard/boot.img
# tar cvf /sdcard/kernel-backup.tar /sdcard/boot.img
tar cvf /sdcard/kernel-backup.tar /sdcard/boot.img
tar: removing leading '/' from member names
sdcard/boot.img
#

check your sd card root. the files are there.

it creates two files..."boot.img" and "karnel-backup.tar"...

which one should I flash with Odin??

Originally Posted by amlanpaira

it creates two files..."boot.img" and "karnel-backup.tar"...

which one should I flash with Odin??

The tar file

The problem is that odin wont flash it i guess !

Sent from my GT-S5360 using XDA App

It doesn't.. I checked..

Sent from my GT-S5360 using XDA App

Originally Posted by noobwithgalaxyy

It doesn't.. I checked..

Sent from my GT-S5360 using XDA App

As i expected !!!we have big problem with odin ...


Sent from my GT-S5360 using XDA App

Yeah we do have a problem.. but Skin did make it work(flashing CWM was successful, even though it didn't work)

If he can let us know how and why other single file flashes do not work..

@ skin1980 can we convert somehow this tar file to update.zip so we can flash it from CWM recovery?