I think this omission might be the cause of some of my confusion. The rest of it can be explained by trying to use several outdated guides instead of one that is actually complete and current. This stuff changes so fast so I can understand the lag in documentation… especially within a dev community where information can turn to assumptions that live only in the heads of the initiated.
I can only assume by eRecovery you’re referring to these dev builds which feature a recovery image. The stable builds don’t have this and it’s like you said… It’s not mentioned here or here or here, or even here where it probably belongs. The best I could find was this discussion that can (presently) only be viewed using googles webcache. (It’s not on wayback)
I too have an s9 that shipped with /e/ running Android 8.1.0. So far I’ve been able to flash a stock Android 10 Rom but when I side loaded /e/Q I got error 7, and some explanations that aren’t making sense to me
One helpful user told me that I had to reboot to recovery in between wiping the system, and wiping the system and data partitions. I didn’t see that in the docs either. One guide says it’s mandatory to install this patch and another patch (no-verity-opt-encrypt-samsung-1.0.zip). The vendors side loaded ok but the other one related to encryption failed with error 1.
What I don’t know is:
1-Do I need to reinstall Stock rom using Odin or is there another way to install /e/Q?
2-Why does a stock rom need to be installed if it’s pretty much going to be blown away immediately using TWRP? Clearly installing the stock rom insures the sideloading of the /e/ zip file but I don’t understand the mechanics
3-Is the real reason why I went wrong because I didn’t use twrp recovery to (overwrite itself?) by installing the eRecovery variant?
4-Do I need to side load the vendors file and the no-verity-opt-encrypt-samsung-1.0.zip file that kept failing for me (I did re-reboot to recovery in between)
There’s no lack of places to get lost. Getting lost is the price to pay for knowledge and I’ve been paying over the last week. I finally feel like I’m close and that there’s just one or two pieces of info that I’m missing.