[LG V20 Guides, News, & Discussion] NeuroEu:
@Whosondephone and to all who might have problems with DATA not mounting after setup:

I have the VS995 and came from the lates build of RR Oreo and Gamma Kernel.

I might have a solution for you and for anybody who has difficulties with being "unable to mount data".

Firstly I recommend flashing TWRP 3.3.0.0 as 3.3.1.0 might be buggy as there is stuff with decryption going on - so this might be a problem with stock roms - at least in our case.

Under "Old versions" you'll find TWRP 3.3.0.0 https://androidfilehost.com/?w=files&flid=292603 (https://xdaforums.com/v20/development/recovery-twrp-3-2-1-0-t3720239 TWRP unofficial)

Try to flash 3.3.0.0 as usual via fastboot. This should be it!

In case this doesn't work out here is my step-by-step installing process:

Important

: in case flashing 3.3.0.0 does not resolve the problem you have to fix DATA MOUNTING:

​

https://www.youtube.com/watch?v=T-7neHzSIvc (it's not mine but works)

I had issue with data unable to mount. So I flashed several times. This are my last steps that worked out finally. This should also work for System Partition. Please be careful in following the steps as you will loos all your data in this process!

1. Try to get any TWRP from Lazerwolfs' old version twrp-3.0.2-1-us996 up to 3.2.... I flashed with 4 different ones (my latest try was with TWRP-3.2.1-0-vs995.img, but any other under 3.3 should do also) - check all your fastboot adb driver!

2. MAKE A COMPLETE BACKUP OF EVERYTHING onto your Micro SD card (Boot, Recovery, System, System Image, Data - the first 5 options!) and copy this backup + all DATA on your SD-card onto your computer - just in case as some of the people here were writing that the kernel install also deleted parts of their Micro SD card! ?*♀️ INTERNAL Storage will be deleted in the next step!!! Safest and probably quickest way will be - of course - to put your ext. SD into a card reader and copy.

3. Delete all Data! Better to not insert your External SD-card yet - just in case. It's up to you.

a. make a factory reset

b. go back to advanced wipe and mark Dalvik, System, Data, Internal Storage, cache and swipe! Now all your private data and system is gone!​

3. Format DATA:

a) go back 2 times to Advanced Wipe / Format Data, choose Format Data and swipe,

b) type "yes" and confirm​

4. Now insert your ext. SD-card with the Oreo.zip, Magisk 19.2 and Magisk Manager 7.2.0 (these are the older versions but they work) and mk2000 kernel (choose the reupload-version VS995_v2.2-mk2000 (reupload).zip https://androidfilehost.com/?w=files&flid=297449 )

5. Flash Rom, Magisk v19.2.zip, Kernel mk2000, Clean delvik cache

6. Reboot to fastboot and flash twrp-3.0.2.1-us996.img (all other should do also, but I used the oldest one in my last trial - I did not try to flash 3.3.0.0 in this step. If you want to take a shortcut it's up to you but I don't know if it works since the Oreo.zip is older). Than fastboot reboot and let your System set up. You should now be without stripes and your installation process should run smoothly.

7. After setup remember to install Magisk Manager. Than reboot and let Magisk update zip and Manager from within Magisk itself - this should work fine. You might now want to install "Quick Reboot" or similar from the Play Store - it's easier to reboot.

8. Now reboot into recovery. Your Data-Partition might now be unmountable (check "Mount" tab and if "Data" is NOT checked your Partition might be very likely corrupt. Try to check it nevertheless, but unless it doesn't let you, you will now proceed the last step:

9. Boot into Bootloader, flash TWRP 3.3.0.0 and reboot. Now you should have your data unlocked - boot into recovery and have a look! If Data (and of course cache and micro sd csard) is now checked, your done!

Hope, this works for you. You might not go the whole way I did. I guess it's just because of the TWRP-Build. At least this worked for me. Then I made my backup and got rid of some useless system-apk ;):D

---------- Post added at 02:10 AM ---------- Previous post was at 01:38 AM ----------

Have a look at my post #93 and good luck!;)