[OnePlus 3 Questions & Answers] hinerk0815:
A week ago I flashed the current (lineage-14.1-20170504-nightly-oneplus3-signed.zip) lineage os nightly to my phone. I did not pay that much attention til I realize the impact, so no guarantee for the temporal order. I am pretty shure, that in the first place, I tried to flash the image via the update menu (is this called OTA update?). The previous update two weeks ago already results in partial data los. By this I mean some (maybe all) apps disappears after the update, but after installing them again, all of them provided the pre-update data - only exception was signal. This time the phone was like in factory state. But when I try to reinstall the telegram app - the app store refuses to install the app because of the presence of a identical named app.

Using adb shell shows me, that all apps and data where still present in the /data subdirectories. Even those I didn't had reinstalled til that time . So I took advantage of momentum and backed up some files and decided to perform a full pre factory reset formatting everything twrp let me format. After flashing the lineage update, another full format because things seems still weird, second lineage nightly flash, realizing I have to first flash OOS-x.y.z and a final third lineage flash, I thought I finally obtain a running system. After initial configuration I decided to only copy my previous wpa_supplicant.conf file back to the system. Since overwriting this file while running android didn't led to anything, I tried to replace this file in recovery mode. Instead of remembering my password, goatish oneplus 3 desides to perform factory reset.

After what seems to be a lower six digit number of flashing attemps I came to the conclusion that performing any modification to the file system while the native kernel is not running results in factory reseting the device. In the mean time I also figured out what dm-verity means - an error message I got used to and maybe a nice feature as long as you don't try to take your old config files to a new system. And I know I am the millionth person facing that problem in a dedicated thread, but I found nothing which links this annoying boot loader message to my reset problem.

I made my previous recovery attemps between the toilet and my bed, so I hadn't any strategy at all. But thank god its friday! I read: dm-verity is a feature of the device mapper which guarantees data integrity. When I alter the data using any other than the native system, the device mapper notices the integrity violation and reports to the system. I am only guessing that this makes the system to reset itself - Am I right? Even if I appreciate this concept, I think this might be a little too ambitious. Can I alter androids behaviour in this point? In the best case I want to temporary disable this feature, do some root stuff and turn it on again. Is this possible?

I could follow one of that numerous tutorials to remove that dm-verity message, but I am not confortable with flashing zip files from dubious file hosters as well as copy-pasting commands without any idea of what I am doing. So maybe someone could provide a little more information than the seven step recipe of getting rid of that error message blog posts.

I really appreciate material which explains my problem. I am quite new to android and I didn't figured out how to maneuver around all these google results which tells me to install a specific app which may will hide my problem. So thank you in advance.