Database Users

Flashing Now Fails

I've been flashing N7 with no issues as recently as over the weekend. Today I tried to flash a new ROM and it failed. Tried a second, different ROM, same result. Do not know what I did. Any thoughts?

Error log would help greatly.

How do I get/generate the log? Haven't had to do it before.
Thanks,
Paul

The logs= errors displayed on the screen provided by the interface you use to flash the rom (recovery, computer...)

Does this help any?
TWRP V2.4.4.0
Updating partition details
E: Unable to open zip file
Error flashing zop
Updating partition details...

do I need to create a partition? Never get more details despite the tease.
Thanks,

First -
Try and download a different (NEWER) TWRP. Re-flash TWRP. Try again
or
Have you tried completely wiping the device? And pushing a ROM from ADB or using a USB OTG and Memory stick?
I had issues with my nexus becoming VERY unstable. Leading to issues.
I completely, and I mean completely, wiped. To the point that all that device basically had was a recovery, and a bootloader.
I proceeded to flash again, BOOM all fixed up.

Is there a new TWRP?
I did a factory restore after wiping everything thing, if that is what you mean?
It was working as expected last week, don't know what I did to screw it up

Boot recovery try the operation, choose advanced then copy log to sdcard. The paste the log results.
sent via electromagnetic radiation.

ibsk8 said:
Boot recovery try the operation, choose advanced then copy log to sdcard. The paste the log results.
sent via electromagnetic radiation.
Click to expand...
Click to collapse
Did this, and it said it copied but I am unable to locate it. It says 0\media\data But that folder structure doesn't exist, at least according to file expert

Will a complete wipe/restore create a partition?

pmgreen said:
Will a complete wipe/restore create a partition?
Click to expand...
Click to collapse
None of the instructions currently found in this forum alters the partitioning of the N7. Not fastboot & not the custom recovery, either.
You are chasing a red herring I think. That message you see is about the recovery performing a scan to check to see if there is a change in file systems (or partitioning of external devices) ... which might have occurred in preceding (custom recovery) operations, but didn't in this particular case.
pmgreen said:
Does this help any?
TWRP V2.4.4.0
Updating partition details
E: Unable to open zip file
Error flashing zop
Updating partition details...
Click to expand...
Click to collapse
Focus your efforts here; it certainly looks like a first-order problem.

bftb0 said:
None of the instructions currently found in this forum alters the partitioning of the N7. Not fastboot & not the custom recovery, either.
You are chasing a red herring I think. That message you see is about the recovery performing a scan to check to see if there is a change in file systems (or partitioning of external devices) ... which might have occurred in preceding (custom recovery) operations, but didn't in this particular case.
Focus your efforts here; it certainly looks like a first-order problem.
Click to expand...
Click to collapse
Think reinstalling TWRP would help? It was working fine so I'm a bit stumped what changed and why

pmgreen said:
Think reinstalling TWRP would help? It was working fine so I'm a bit stumped what changed and why
Click to expand...
Click to collapse
You can also soft-boot a recovery without actually flashing it, e.g.
Code:
fastboot boot custom-recovery.img
I suppose you could then poke around and see if it is having troubles mounting any of the normal partitions (/data, /system, or /cache). Look in the kernel boot log of the recovery (cat /proc/kmsg or "dmesg") to see if anything looks strange, etc.
There have been a couple of reports from folks who developed problems that looked like eMMC flash media errors - loss of partitions, failure to mount /data, et cetera. At the moment though, your symptoms are very generic and non-specific, as in "it doesn't boot".
I suppose you saw no errors at all reported on the screen during that stock-install-via-fastboot procedure?

bftb0 said:
You can also soft-boot a recovery without actually flashing it, e.g.
Code:
fastboot boot custom-recovery.img
I suppose you could then poke around and see if it is having troubles mounting any of the normal partitions (/data, /system, or /cache). Look in the kernel boot log of the recovery (cat /proc/kmsg or "dmesg") to see if anything looks strange, etc.
There have been a couple of reports from folks who developed problems that looked like eMMC flash media errors - loss of partitions, failure to mount /data, et cetera. At the moment though, your symptoms are very generic and non-specific, as in "it doesn't boot".
I suppose you saw no errors at all reported on the screen during that stock-install-via-fastboot procedure?
Click to expand...
Click to collapse
The only error is that it can't open the zip. I've tried downgraded TWRP, then upgrading back. Tried flashing the existing rom.
Nothing has worked. The N7 is functional, just will not allow me to flash

pmgreen said:
The only error is that it can't open the zip. I've tried downgraded TWRP, then upgrading back. Tried flashing the existing rom.
Nothing has worked. The N7 is functional, just will not allow me to flash
Click to expand...
Click to collapse
Well, if the source material can't be opened, then there is nothing to be flashed.
So maybe it is better to call this a "can't open files" problem instead of a "can't flash" problem.
Are there any special characters in the file name ... or spaces? If so, try renaming the file so the name only contains [a-z], [A-Z], [0-9] plus dash, underscore, and dot.
The other thing that can happen is if you drop a file in /data/media/0 as the root user, it will show up under /sdcard, but can't be read by non-privileged users via the /sdcard/ path. I'm not sure what the exact details are here - much less why this would effect the recovery (as you would expect everything to be running as root there) - but you can detect this problem by using a terminal emulator, and looking for differences in ownership or file permission:
Code:
$ su
# cd /data/media/0
# ls -ld *
use chown and chmod as appropriate to fix files as needed

bftb0 said:
Well, if the source material can't be opened, then there is nothing to be flashed.
So maybe it is better to call this a "can't open files" problem instead of a "can't flash" problem.
Are there any special characters in the file name ... or spaces? If so, try renaming the file so the name only contains [a-z], [A-Z], [0-9] plus dash, underscore, and dot.
The other thing that can happen is if you drop a file in /data/media/0 as the root user, it will show up under /sdcard, but can't be read by non-privileged users via the /sdcard/ path. I'm not sure what the exact details are here - much less why this would effect the recovery (as you would expect everything to be running as root there) - but you can detect this problem by using a terminal emulator, and looking for differences in ownership or file permission:
Code:
$ such
# cd /data/media/0
# ls -ld *
use chown and chmod as appropriate to fix files as needed
Click to expand...
Click to collapse
Thanks bftb, you are correct it's a can't open zip. No error than fail and it can't open the zip. It says updating partition but nothing changes
The file names are from the developers, once of which I recently successfully flashed. Tried coping the log to the SD card, but unable to find /data/media/0. Do I need to recreate a partition?

(FYI there was an auto-correct typo in my prior post - "su" not "such". Derp)
pmgreen said:
Do I need to recreate a partition?
Click to expand...
Click to collapse
No. (There is no way to do that with the tools we have anyway)
Unless what you mean by "recreate" is rebuild/reinitialize a filesystem in a partition - that's a possibility.
You need to try and figure out why you can't read files.
As a workaround, you can put files on a USB key (FAT formatted, not NTFS) and using TWRP access them by putting the USB key on the other end of a OTG cable.
Your posts are a bit vague - I can't even tell if you have tried other ROM files, whether you checked them to see if they are the correct size/checksum, etc.

pmgreen said:
Tried coping the log to the SD card, but ...
Click to expand...
Click to collapse
At this point, your best approach is still to follow the initial advice of 'ibsk8'. Look in the log file for any further details about errors that occurred.
The logs are typically in /cache/recovery/ or (while the custom recovery is running) in /tmp
Use "adb pull" to get the log file to your PC and have a look at it. If you can't find anything obvious in there, then cut-n-paste the file to http://pastebin.com and provide the link to us.

bftb0 said:
At this point, your best approach is still to follow the initial advice of 'ibsk8'. Look in the log file for any further details about errors that occurred.
The logs are typically in /cache/recovery/ or (while the custom recovery is running) in /tmp
Use "adb pull" to get the log file to your PC and have a look at it. If you can't find anything obvious in there, then cut-n-paste the file to http://pastebin.com and provide the link to us.
Click to expand...
Click to collapse
I am not familiar using ADB pull. Tried using a root file manager to access the log but don't see.
Greatly appreciate your help, let me know what other info I should paste.
Thanks,

[Q] how to recover data from a phone that will not boot

I have jamal2367's [AOSP] official 4.4.2 - S4 Google Edition ROM installed (final R1.2) a SGH-1337M.
The other day it started getting stuck on boot; the blue, red, yellow, green circles just continually go in and out without anything else happening. I have booted into CWM Recovery (v6.0.4.4) and done a wipe cache partition and wipe dalvik cache but it did not help.
Can anyone provide advice/steps on how to copy the data (mostly pics and WhatsApp history) off this phone? SMS history would also be nice but not necessary.

toggly said:
I have jamal2367's [AOSP] official 4.4.2 - S4 Google Edition ROM installed (final R1.2) a SGH-1337M.
The other day it started getting stuck on boot; the blue, red, yellow, green circles just continually go in and out without anything else happening. I have booted into CWM Recovery (v6.0.4.4) and done a wipe cache partition and wipe dalvik cache but it did not help.
Can anyone provide advice/steps on how to copy the data (mostly pics and WhatsApp history) off this phone? SMS history would also be nice but not necessary.
Click to expand...
Click to collapse
I would make a backup in your recovery and then flash the rom you had installed. See if that helps.
Edit: You didn't try to update. I changed my comment saying you had tried.

1. Download Aroma File Manager
2. Put a external sd into your phone.
3. Boot into the custom recovery and flash the Aroma file.
4. It will boot into a file browser and you can copy all the files from internal to your external.
ps it's possible that your custom recovery already has a filemanager build in. Then all these steps are obsolete.

I boot into AROMA Filemanager but I can't see anything on the internal SD card (see attachment).
Any ideas? Does that folder icon mean the "sdcard" folder is encrypted?

toggly said:
I boot into AROMA Filemanager but I can't see anything on the internal SD card (see attachment).
Any ideas? Does that folder icon mean the "sdcard" folder is encrypted?
Click to expand...
Click to collapse
Is it encrypted? Then probably it won't work. In that case just reflash the rom you are on without wiping.

toggly said:
Does that folder icon mean the "sdcard" folder is encrypted?
Click to expand...
Click to collapse
Lennyz1988 said:
Is it encrypted? Then probably it won't work. In that case just reflash the rom you are on without wiping.
Click to expand...
Click to collapse
I don't know, that's why I am asking what that icon means?

You say CWM is working, so you can just adb pull everything you need. Applications usually save data in a directory under /data/data or /sdcard/Android/data.
You should find the directories you want with adb shell, then you can adb pull them, then if you reflash your rom you can adb push them back into the same locations. Also, depending where they are saved, your pictures will most likely not be deleted when you reflash your rom. Better safe than sorry though.
If you don't have adb you'll have to download the binary, or you can install the entire Android SDK. Which operating system do you use?

toggly said:
I don't know, that's why I am asking what that icon means?
Click to expand...
Click to collapse
The icons means that it's symlinked. If it's not encrypted then you should find the data. It can be in an other place then where you are looking. Try looking in /data/media or some other maps in /data
Or just flash the rom you are currently on without wiping.
soldier9599 said:
You say CWM is working, so you can just adb pull everything you need. Applications usually save data in a directory under /data/data or /sdcard/Android/data.
You should find the directories you want with adb shell, then you can adb pull them, then if you reflash your rom you can adb push them back into the same locations. Also, depending where they are saved, your pictures will most likely not be deleted when you reflash your rom. Better safe than sorry though.
If you don't have adb you'll have to download the binary, or you can install the entire Android SDK. Which operating system do you use?
Click to expand...
Click to collapse
Adb won't work unless he already has authorized adb when his device was booted.

toggly said:
I boot into AROMA Filemanager but I can't see anything on the internal SD card (see attachment).
Any ideas? Does that folder icon mean the "sdcard" folder is encrypted?
Click to expand...
Click to collapse
You need to mount partitions to see the contents.. Go to Aroma File Manager Settings and check the option "Moumt automatically partition on boot".. then restart your recovery and flash again the Aroma File Manager

Lennyz1988 said:
Adb won't work unless he already has authorized adb when his device was booted.
Click to expand...
Click to collapse
I've had devices where the first thing I did with them was unlock bootloader, fastboot flash recovery, and then go into recovery and adb sideload, all without booting the system.

peppe130 said:
You need to mount partitions to see the contents.. Go to Aroma File Manager Settings and check the option "Moumt automatically partition on boot".. then restart your recovery and flash again the Aroma File Manager
Click to expand...
Click to collapse
That did the trick, thanks!!

Nothing

soldier9599 said:
I've had devices where the first thing I did with them was unlock bootloader, fastboot flash recovery, and then go into recovery and adb sideload, all without booting the system.
Click to expand...
Click to collapse
Yes and I believe that. But from version 4.2.2 android forces rsa encryption. So you need to boot into your rom and enable it. Unless the custom rom/kernel has disabled it, but I haven't seen any that have.

How do I decrypt my 6p

I flashed CM when it first arrived and encrypted my phone. How do I unencrypt it again? Thanks in advance.

jdub251 said:
I flashed CM when it first arrived and encrypted my phone. How do I unencrypt it again? Thanks in advance.
Click to expand...
Click to collapse
I don't think you can decrypt without formatting the area.

jdub251 said:
I flashed CM when it first arrived and encrypted my phone. How do I unencrypt it again? Thanks in advance.
Click to expand...
Click to collapse
You need a kernel that does not force encryption. I believe ex kernel is an option. I run benzo rom which does not force encryption. Make sure yo backup any data you want to keep. The process should go as follows:
Flash rom
Flash gapps
Flash kernel
Select wipe
Format data
Reboot Recovery
Reboot system

n.halepat said:
You need a kernel that does not force encryption. I believe ex kernel is an option. I run benzo rom which does not force encryption. Make sure yo backup any data you want to keep. The process should go as follows:
Flash rom
Flash gapps
Flash kernel
Select wipe
Format data
Reboot Recovery
Reboot system
Click to expand...
Click to collapse
Ok! Will try this! Thanks! I believe this will work!
Sent from my Nexus 6P using Tapatalk

jdub251 said:
Ok! Will try this! Thanks! I believe this will work!
Sent from my Nexus 6P using Tapatalk
Click to expand...
Click to collapse
Just make sure you format data, not wipe.

n.halepat said:
You need a kernel that does not force encryption. I believe ex kernel is an option. I run benzo rom which does not force encryption. Make sure yo backup any data you want to keep. The process should go as follows:
Flash rom
Flash gapps
Flash kernel
Select wipe
Format data
Reboot Recovery
Reboot system
Click to expand...
Click to collapse
Heisenberg said:
Just make sure you format data, not wipe.
Click to expand...
Click to collapse
Have you noticed any speed difference after decrypting?
Also is it possible to decrypt using a kernel that doesn't force encryption and then switch to a kernel that may not have that? I would still have to turn encryption on via Settings -> Encrypt is what I'm thinking.

exSD said:
Have you noticed any speed difference after decrypting?
Also is it possible to decrypt using a kernel that doesn't force encryption and then switch to a kernel that may not have that? I would still have to turn encryption on via Settings -> Encrypt is what I'm thinking.
Click to expand...
Click to collapse
I've seen some testing regarding encrypted vs decrypted, the performance gain is so small it's negligible. If you switch to a kernel that forces encryption, it'll encrypt automatically on boot.

Heisenberg said:
I've seen some testing regarding encrypted vs decrypted, the performance gain is so small it's negligible. If you switch to a kernel that forces encryption, it'll encrypt automatically on boot.
Click to expand...
Click to collapse
Have you read http://www.anandtech.com/show/9820/the-google-nexus-6p-review ?
The difference in storage speeds is drastic.
Encrypted: 75.7MB/s seq read, 40.6MB/s seq write, 7.4MB/s rand read, 1.0MB/s rand write.
Unencrypted: 179.7MB/s seq read, 52MB/s seq write, 14.73MB/s rand read, 6.3MB/s rand write.

exSD said:
Have you read http://www.anandtech.com/show/9820/the-google-nexus-6p-review ?
The difference in storage speeds is drastic.
Encrypted: 75.7MB/s seq read, 40.6MB/s seq write, 7.4MB/s rand read, 1.0MB/s rand write.
Unencrypted: 179.7MB/s seq read, 52MB/s seq write, 14.73MB/s rand read, 6.3MB/s rand write.
Click to expand...
Click to collapse
No I hadn't seen that particular article. I guess the results must vary, the results I saw showed performance gains in the order of less than a percent.

Heisenberg said:
No I hadn't seen that particular article. I guess the results must vary, the results I saw showed performance gains in the order of less than a percent.
Click to expand...
Click to collapse
In terms of power consumption, the CPU is processing an extra step for every instruction it has passed to it. I would think that with the inefficient chip the 810 already is that this would impact battery life more than real world opening apps type speed.
I think I'll decrypt to see if I can notice any power differences.

so if i copy all my files to my PC before following these steps, I would still be able to use them afterwards? ie pictures, sounds, images, and titanium backup files? i'm wanting to try benzorom and it sounds like it doesn't get along with encryption very well.

glhelinski said:
so if i copy all my files to my PC before following these steps, I would still be able to use them afterwards? ie pictures, sounds, images, and titanium backup files? i'm wanting to try benzorom and it sounds like it doesn't get along with encryption very well.
Click to expand...
Click to collapse
Yeah, as long as you back up everything to your PC you can just transfer them all back to your phone after you do this.

if i do a nandroid backup (from TWRP) of an encrypted system then create backup of /sdcard, wipe userdata than restore /sdcard and restore backup with a non forcing kernel will i get a decrypted device with all data restored?

answering my own question:
- twrp backup data
- copy /sdcard to pc
- fastboot format userdata
- copy from pc to /sdcard
- restore data in twrp
are the needed steps to decrypt without losing any data.

A bit of a necro, so I apologize for that.
@ratson: I am attempting to do exactly what you have mentioned here, although I am not an experienced user. Can I get some clarification on the following:
TWRP backup: Done. It keeps wanting to restrict my permissions on this folder, but I was able to get it off the device (Nexus6p Huawei) and backed up onto my PC.
copy the /sdcard to the PC. Man, what a problem I am having with this. First off, when it gets to a folder called /kick it fails because it says it's not a directory. It does this on some long hex named file that actually isn't a directory, but it seems to want to recognize it as one anyway, and then fail the pull because of this.
So, I cut the entire /kick folder through ES Explorer, and temporarily pasted it into my dropbox. Restarted the adb pull through my shell. It seemed to be working ok, until it got to the TWRP folder. While backing that up (I already did this, but it is still on the device as I only copied it. Should I be deleting this before backing up the rest of the /sdcard?) it fails because it says permission denied when it tries to pull some of the backup files.
At this point I've restarted the pull, and tried different things for several hours. Before I continue to bang my head against the wall, I'd like to get some advice.
How do you pull the /sdcard to your pc? what method? what commands? do you do it from TWRP recovery mode, from the system? Pretend I'm an android toddler (I kind of am). Is there anyway to not start from scratch every time the pull fails? Is there ways to pre-empt the failures?
Once this is complete, when you restore the data, can you please also list the commands for that?
I greatly appreciate your, or anyone elses help to reads this.
Thanks,

For the record:
Make sure battery is charged!
On PC: adb reboot recovery
In TWRP: select BACKUP, select DATA, swipe
When finished
On PC:
mkdir DATA-BACKUP
adb pull /data/media/0/TWRP/BACKUPS
fastboot reboot bootloader
fastboot format userdata
On Phone:
arrow down to select recovery, power to enter
cd DATA-BACKUP
adb push * /data/media/TWRP/BACKUPS
When finished
In TWRP: Restore, select the backup, swipe

rchtk said:
For the record:
Make sure battery is charged!
On PC: adb reboot recovery
In TWRP: select BACKUP, select DATA, swipe
When finished
On PC:
mkdir DATA-BACKUP
adb pull /data/media/0/TWRP/BACKUPS
fastboot reboot bootloader
fastboot format userdata
On Phone:
arrow down to select recovery, power to enter
cd DATA-BACKUP
adb push * /data/media/TWRP/BACKUPS
When finished
In TWRP: Restore, select the backup, swipe
Click to expand...
Click to collapse
This will backup and restore the nandroid backup, but not the sdcard, correct? Or am i getting it wrong?

Kalamos said:
This will backup and restore the nandroid backup, but not the sdcard, correct? Or am i getting it wrong?
Click to expand...
Click to collapse
It will restore what you backed up: the complete data partition: app settings, contacts, media,.. All your datas..

rchtk said:
It will restore what you backed up: the complete data partition: app settings, contacts, media,.. All your datas..
Click to expand...
Click to collapse
I was under the impression that a nandroid backup didnnot include apps, user settings, etc. Otherwise, what is the use of Titanium Backup? Perhaps I'm jist confused.

I'm curious if 7.1 still has a huge performance hit with encrypted partitions.
Anyone know of a good app for checking performance of the data partition? All I've seen is internal/external storage.
Thanks.

reset pattern lock without data loss

Recently when i restored my data using TWRP i faced a problem at lock screen.
I was not able to unlock my phone with the pin i set Earlier..So after so many attempts i was able to find a solution for that problem.(works with pattern,pin etc)
Requirements
-----------------
1. A phone That cant be unlocked witha your Pin/Pattern
2.Any custom recovery installed(TWRP i will say)..Get TWRP from https://twrp.me/Devices/
Steps
-------
1.Once You installed twrp boot into recovery mode.
2.Go to advanced>filemanager to acces the files in your phone.
3.Ggo to the /data/system folder. Scroll down and find the two files with the .key extension. Delete both of them (by tapping on the file and then tapping the �Delete� button). Then, delete all the files containing the word locksettings.
password.key
pattern.key
locksettings.db
locksettings.db-shm
locksettings.db-wal
Once you�ve deleted all the key and locksettings files, reboot your system. If it asks you to install SuperSU, choose �Do Not Install�.
Once Android starts, your lock screen should appear, with no PIN or password prompt. Unlock your phone (yay!) and head to Android�s Settings. Scroll down and go to Security > Screen Lock. From there, you can choose a new PIN or password to lock your phone.
Hope this helped you..Hot Thanks if this was helpful

I have created recovery flashable zip for this issue.

SG3 said:
I have created recovery flashable zip for this issue.
Click to expand...
Click to collapse
Well done bro ?

Thanks dude, you save my data with very simple trick....

no TRW installed
I am not sure whether TRW is installed in my phone. It's in locked state now. What else can be done ? I do not want to lose the data (photos). Some important photos are there. I have Redmi Y2 phone and it's pattern locked. I forgot the pattern. please help.

Well in my case, the file i deleted named "locksetting.db" in /data/system

thank you so so much its so helpful

I am also facing same issue. Did you get any solution ?
Thanks
LABM said:
I am not sure whether TRW is installed in my phone. It's in locked state now. What else can be done ? I do not want to lose the data (photos). Some important photos are there. I have Redmi Y2 phone and it's pattern locked. I forgot the pattern. please help.
Click to expand...
Click to collapse

[Discussion] Complete decryption for having better flexibilty in changing ROMs

One of the biggest enemies for people who frequently switch ROMs is the encryption system, many times we end up wiping the entire device.
OnePlus 5 and 5T had a method to decrypt the device and not having to worry about accidental wipes ( NO-Verify.zip)
Has anyone tried the same method on our 6T?

Well i tried it on my 6T and it worked, but with one problem.
After decrypting permanently when i locked device with any password or pattern, it didn't accepted the password i set it up with.
So moved back to encryption

You should not have to do that. I recommend you read this thread all the way through; I think your answer is here, under the How to create a Nandroid Backup.
https://forum.xda-developers.com/oneplus-6t/how-to/guide-oneplus-6t-unlock-bootloader-t3851789
"Boot into TWRP
Use the TWRP File Manager and Navigate to /data/sytem/ and delete the following files:
locksettings.db
locksettings.db-shm
locksettings.db-wal.
gatekeeper.password.key
gatekeeper.pattern.key
You may or may not have all the above files so delete the ones you have.
Reboot the phone and (if you've set a PIN) enter it to decrypt the storage one more time. After that you can simply unlock your phone with a swipe."

hithekillswitch said:
You should not have to do that. I recommend you read this thread all the way through; I think your answer is here, under the How to create a Nandroid Backup.
https://forum.xda-developers.com/oneplus-6t/how-to/guide-oneplus-6t-unlock-bootloader-t3851789
"Boot into TWRP
Use the TWRP File Manager and Navigate to /data/sytem/ and delete the following files:
locksettings.db
locksettings.db-shm
locksettings.db-wal.
gatekeeper.password.key
gatekeeper.pattern.key
You may or may not have all the above files so delete the ones you have.
Reboot the phone and (if you've set a PIN) enter it to decrypt the storage one more time. After that you can simply unlock your phone with a swipe."
Click to expand...
Click to collapse
In case I delete these files do I need to set a pin or if I reboot to TWRP next time it will not ask me for it ? I am asking because I have lost my internal storage thrice before trying to only install OOS.

My understanding is this will only remove your password. I would read the whole thread above, and always make a backup with TWRP and titanium or the like, and save those backups to a PC as well as the phone storage. Encryption is tricky, but you know that already. Good luck!

hithekillswitch said:
You should not have to do that. I recommend you read this thread all the way through; I think your answer is here, under the How to create a Nandroid Backup.
https://forum.xda-developers.com/oneplus-6t/how-to/guide-oneplus-6t-unlock-bootloader-t3851789
"Boot into TWRP
Use the TWRP File Manager and Navigate to /data/sytem/ and delete the following files:
locksettings.db
locksettings.db-shm
locksettings.db-wal.
gatekeeper.password.key
gatekeeper.pattern.key
You may or may not have all the above files so delete the ones you have.
Reboot the phone and (if you've set a PIN) enter it to decrypt the storage one more time. After that you can simply unlock your phone with a swipe."
Click to expand...
Click to collapse
This doesn't work any longer starting with pie. At least both times I tried it. Last i got it to go was with Oreo on my shamu and essential. Also, no verity and anything disabling encryption, disables any phone security until u restore with msm.