I have a pixel 4a with software 11.0.0 (RQ1A.210205.004 Feb 2021) installed, which was patched by MAgisk, and a stick instead of the original system image, so the device is now rooted. command cmd adb getvar all - notifies that slot B is active, tried to boot into slot a - there is an arbitrarily long download, but the download bar does not lead to the slightest progress (against the G google logo), the situation changed only after how I disconnected the phone from the USB cable connecting the phone to the computer and pressed the on / off button + volume down button together, after which the phone rebooted into a working Android system, but already in slot b , where it was before. First I have to send all the necessary files to the phone memory via adb push (sunfish_twrp3.6.1-11.img, bluespark.zip, Magisk-v25.2.zip, stub-release.zip, 11.0.0 (RQ3A.211001.001, Oct 2021 ) In order for me to install TWRP from this topic, do I understand correctly that the first action I have to do is switch the device to slot a ?To do this, execute adb reboot bootloader, which will put the phone into bootloader mode, then I need will switch between slots and make slot A active (fastboot set_active a), then I need to load the twrp.img image using the fastboot boot sunfish_twrp3.6.1-11.img command, then it loads (how to do this in the downloaded twrp?) and then, going into the shell of the downloaded twrp, I must install the bluespar.zip core from the internal memory of the phone, then, without leaving the downloaded twrp shell, I must again install sunfish_twrp3.6.1-11.img into boot slot A,
write me an explanation for each step that I did not correctly write the commands that I must perform and all the intermediate steps, especially the mode change between slots, so that I install everything in the correct slots and not make a mistake between them (all actions so that I understand in which case I will have to switch between them or in what order (if the order described above is not correct, I understand that I can install magic.zip from the twrp shell)
And I’ll clarify, I also need a twrp 3.6.1-11.zip file, so that after fastboot boot_a twrp 3.6.1-11.img, I can install twrp as a recovery (which is not yet installed and loaded temporarily) I must have twrp 3.6.1-11.zip to be able after installing the bluespark kernel (by the way, which partition for the bluespark kernel to choose?) And or b if before all the manipulations the active Android 11 OS is in the active slot B? only after installing the bluespark kernel from the twrp shell will I make the final installation of twrp (in slot A correctly I understand)?
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(ie flash/backup/restore)? And to b clear, I totally understand all is done at MY own risk, its just, what could I expect if everything else is ok. I mean, have others tested a backup, flash another ROM, and then restore of the nandroid?
