Hi,

I tried to update my P6 using the magisk OTA update method:

-Unistall / Restore image
-Install OTA, no reboot
-Install magisk on inactive slot
-Reboot

My phone was on the SQ3A.220705.001.B2 update, few months old.

When I rebooted, I was prompted with the "device corrupted" message. I pressed the power key to continue, and was stuck at the Google logo boot loop.

I forced turned off the phone (hold power + vol up a few sec), and the phone rebooted, no corruption message to my surprise, and booted correctly. However, my system did not update (still on SQ3A.220705.001.B2).

I'm a rookie on device rooting, but my understanding is that my inactive slot (partition b) as the update installed but is corrupted and goes in boot loop, while partition a is not updated but not corrupted either.

The thing is, I only did "install on inactive slot", so magisk was uninstalled on partition a, and rebooting made me lost root on that partition.

Is there any way to de-corrupt partition b without losing data ? Because without root on partition a, it seems like I'll need to reinstall it, meaning a factory reset...

I've searched a bit on here, saw that it was probably an avb bug (but rookie me doesn't know what avb is), and that OTA update using magisk inactive partition was not recommended for P6 and P7.

Any help would be greatly appreciated, thanks !

SleinBuyt said:

Is there any way to de-corrupt partition b without losing data ? Because without root on partition a, it seems like I'll need to reinstall it, meaning a factory reset...

I've searched a bit on here, saw that it was probably an avb bug (but rookie me doesn't know what avb is), and that OTA update using magisk inactive partition was not recommended for P6 and P7.

Any help would be greatly appreciated, thanks !

Be certain you're running the latest version of ADB. Google provides a link to the package you can download and extract. Then download a factory image from Google, extract the files from the zip to the same folder ADB was wxtracted to, and edit "flash-all.bat" in a text editor. You're looking for a snippet of text, "-w". Delete that text and save the file. From there, connect the unit to your PC and flash the ROM.

This will restore both partitions to working condition without removing data, but you will lose root in the process and will need to root again.

Strephon Alkhalikoi said:

Be certain you're running the latest version of ADB. Google provides a link to the package you can download and extract. Then download a factory image from Google, extract the files from the zip to the same folder ADB was wxtracted to, and edit "flash-all.bat" in a text editor. You're looking for a snippet of text, "-w". Delete that text and save the file. From there, connect the unit to your PC and flash the ROM.

This will restore both partitions to working condition without removing data, but you will lose root in the process and will need to root again.

Strephon Alkhalikoi said:

Be certain you're running the latest version of ADB. Google provides a link to the package you can download and extract. Then download a factory image from Google, extract the files from the zip to the same folder ADB was wxtracted to, and edit "flash-all.bat" in a text editor. You're looking for a snippet of text, "-w". Delete that text and save the file. From there, connect the unit to your PC and flash the ROM.

This will restore both partitions to working condition without removing data, but you will lose root in the process and will need to root again.

Ok I'll find out how to flash ROM using adb beacause I don't remember, and I'll do what you said.

After that, I should be able to force boot to partition b (the updated one) using adb, right? And will I be able to root without losing data ?

SleinBuyt said:

Ok I'll find out how to flash ROM using adb beacause I don't remember, and I'll do what you said.

After that, I should be able to force boot to partition b (the updated one) using adb, right? And will I be able to root without losing data ?

Ok so I've searched a bit, since my bootloader is unlocked I'll be able to root without losing data. The only question that remains :

You told me to download a factory image and to flash it with adb. Can I download the lasted version, for example the one that I failed to update to? If so, after flashing, will my de va ice be updated to the lasted version ?

Because that means that it's a way to update my phone, if I don't want to get the corruption error :

-download lasted update
-flash using adb, with the edited .bat
-Reboot and re-flash magisk
-done

SleinBuyt said:

Ok so I've searched a bit, since my bootloader is unlocked I'll be able to root without losing data. The only question that remains :

You told me to download a factory image and to flash it with adb. Can I download the lasted version, for example the one that I failed to update to? If so, after flashing, will my de va ice be updated to the lasted version ?

Because that means that it's a way to update my phone, if I don't want to get the corruption error :

-download lasted update
-flash using adb, with the edited .bat
-Reboot and re-flash magisk
-done

Click to expand...

I think that the easiest way is with Pixel Flasher, it makes everything automatically with data preserve.

SleinBuyt said:

Ok so I've searched a bit, since my bootloader is unlocked I'll be able to root without losing data. The only question that remains :

You told me to download a factory image and to flash it with adb. Can I download the lasted version, for example the one that I failed to update to? If so, after flashing, will my de va ice be updated to the lasted version ?

Because that means that it's a way to update my phone, if I don't want to get the corruption error :

-download lasted update
-flash using adb, with the edited .bat
-Reboot and re-flash magisk
-done

Click to expand...

m_pastuszek said:

I think that the easiest way is with Pixel Flasher, it makes everything automatically with data preserve.

@SleinBuyt : Yes

@m_pastuszek : While he could do that he should learn how to do it without a tool first. That way he can understand what is going on when the tool is working.