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[ROM][9.0.0_r37][OnePlus 6T] ► Nitrogen OS ◄ [OFFICIAL][Substratum][14/05/2019]

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Causical

Senior Member
Feb 4, 2016
757
331
OnePlus 6T
When you say make sure oos is flashed to both a and b slots should i boot into TWRP and reflash my OOS to both slots? As in when an update is accepted it only goes to one slot? I'm not well versed with this a/b partition.
If you're coming from stock OOS (have not flashed a custom Rom) then you already have an OOS based Rom on both slots (preferably the stable variant 9.0.14)... The point is to have a stable base to flash a custom Rom on top of so that there aren't any residuals from a previous Rom causing conflicts with your current Rom. Also flashing to both slots ensures that you won't run into encryption/decryption problems. The best way to describe the slots is it's like having two of the exact same thing, instead of flashing your device traditionally, you'll need to do it for both slots as if it were two different phones in one.
TWRP runs a script to flash to both A and B slots, Roms always install on the slot opposite to the one you're currently booted on (inactive) and Magisk/kernels/Mods always flash to your current slot.
So in my personal opinion you may as well ALWAYS have both of your slots the same since you only ever boot one and the other is just a back up and you'll just run into encryption problems anyhow if you don't.
So the confusion about understanding the slots most likely arises from the fact that everything you flash (recovery, Roms, Magisk) all flash to the slots differently. The slots themselves aren't actually confusing at all, they're simply two sides of the exact same traditional flashing method you're used to from the pre-A/B days. You just gotta make sure your flashing all the same stuff to both sides.
 
Last edited:

ecotrojan

Senior Member
If you're coming from stock OOS (have not flashed a custom Rom) then you already have an OOS based Rom on both slots (preferably the stable variant 9.0.14)... The point is to have a stable base to flash a custom Rom on top of so that there aren't any residuals from a previous Rom causing conflicts with your current Rom. Also flashing to both slots ensures that you won't run into encryption/decryption problems. The best way to describe the slots is it's like having two of the exact same thing, instead of flashing your device traditionally, you'll need to do it for both slots as if it were two different phones in one.
TWRP runs a script to flash to both A and B slots, Roms always install on the slot opposite to the one you're currently booted on (inactive) and Magisk/kernels/Mods always flash to your current slot.
So in my personal opinion you may as well ALWAYS have both of your slots the same since you only ever boot one and the other is just a back up and you'll just run into encryption problems anyhow if you don't.
So the confusion about understanding the slots most likely arises from the fact that everything you flash (recovery, Roms, Magisk) all flash to the slots differently. The slots themselves aren't actually confusing at all, they're simply two sides of the exact same traditional flashing method you're used to from the pre-A/B days. You just gotta make sure your flashing all the same stuff to both sides.



Top marks to you my friend

You have taught a nearly 50 year old something new

Thank you!
 

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  • 20
    NOS.png

    Android OS version: 9.0.0_r37
    For devices: OnePlus 6T (fajita)
    Authors build: @adityajadaun
    Source code: https://github.com/nitrogen-project
    Developers: xyyx, wight554
    Thanks: darkobas, ezio84, beanstown106, maxwen, SyCreed and etc.
    Google Apps: Open GAPPS
    Recovery: TWRP

    https%3A%2F%2Fimg.xda-cdn.com%2FGJbXIfU51dGCI4Znbi48AgOC7Pk%3D%2Fhttp%253A%252F%252Fi.imgur.com%252FmSx8lRG.png

    Based on AOSP
    • xyyx (Max) - main developer

    https%3A%2F%2Fimg.xda-cdn.com%2FO0WKS4As80693Rn8VRiKvfWPh9s%3D%2Fhttp%253A%252F%252Fi.imgur.com%252FIxVVRiE.png

    Recommended TWRP: blu_spark (search filenames starting with 'twrp-*')
    • Backup all your data (Important)
    • Make sure you have latest OOS Stable (recommended 9.0.12 or later one) installed on both A and B slots!
    • Wipe System, Data, Dalvik Cache (if coming from another rom)
    • Flash rom zip followed by Twrp installer zip
    • Reboot recovery
    • Flash gapps
    • Flash Magisk (if u want root access)
    • Reboot system and Enjoy !

    https%3A%2F%2Fimg.xda-cdn.com%2FuoL5SbNKuKA-mi-Fbd0TMAcbvE0%3D%2Fhttp%253A%252F%252Fi.imgur.com%252FC8vWqi4.png

    ROM: Nitrogen-OS-P-fajita-20190514 (OFFICIAL)
    Note: Flashing GApps after flashing ROM is required becoz I use GCam as inbuilt app which requires Google Play Services.

    GApps: OpenGApps

    https%3A%2F%2Fimg.xda-cdn.com%2FZQrpKM-ux_RP1lUBrUD3xOsX3UQ%3D%2Fhttp%253A%252F%252Fi.imgur.com%252FNnOP1ox.png

    Nitrogen Project: https://github.com/nitrogen-project
    Kernel Source: https://github.com/mTresk/android_kernel_oneplus_sdm845

    Known Bugs:
    * ??

    -----------------------------------------------------------------
    A big thanks to entire OMNI team, @vache, @phhusson and @darkobas for all the hard work and effort put in fixing in-display fingerprint. :)
    Also thankful to @anirudhgupta109 and @mtresk.
    -----------------------------------------------------------------


    XDA:DevDB Information
    [ROM][9.0.0_r37][OnePlus 6T] ► Nitrogen OS ◄ [OFFICIAL][Substratum][14/05/2019], ROM for the OnePlus 6T

    Contributors
    adityajadaun, xyyx
    ROM OS Version: 9.x Pie
    ROM Kernel: Linux 4.x
    ROM Firmware Required: OOS Pie firmware

    Version Information
    Status: Stable

    Created 2019-05-14
    Last Updated 2019-05-14
    8
    Changelog:-
    - First initial and OFFICIAL build
    2
    When you say make sure oos is flashed to both a and b slots should i boot into TWRP and reflash my OOS to both slots? As in when an update is accepted it only goes to one slot? I'm not well versed with this a/b partition.
    If you're coming from stock OOS (have not flashed a custom Rom) then you already have an OOS based Rom on both slots (preferably the stable variant 9.0.14)... The point is to have a stable base to flash a custom Rom on top of so that there aren't any residuals from a previous Rom causing conflicts with your current Rom. Also flashing to both slots ensures that you won't run into encryption/decryption problems. The best way to describe the slots is it's like having two of the exact same thing, instead of flashing your device traditionally, you'll need to do it for both slots as if it were two different phones in one.
    TWRP runs a script to flash to both A and B slots, Roms always install on the slot opposite to the one you're currently booted on (inactive) and Magisk/kernels/Mods always flash to your current slot.
    So in my personal opinion you may as well ALWAYS have both of your slots the same since you only ever boot one and the other is just a back up and you'll just run into encryption problems anyhow if you don't.
    So the confusion about understanding the slots most likely arises from the fact that everything you flash (recovery, Roms, Magisk) all flash to the slots differently. The slots themselves aren't actually confusing at all, they're simply two sides of the exact same traditional flashing method you're used to from the pre-A/B days. You just gotta make sure your flashing all the same stuff to both sides.
    2
    Interested in trying, but it would be great if there was a feature list and screenshots