h870 unavailable to flash twrp - LG G6 ROMs, Kernels, Recoveries, & Other Developme

Tried to flash pixel rom on my phone, but got stuck on Google loading screen. Then i updated twrp but now after updating, the phone either tries to boot up and gets stuck on Google screen or instead of booting twrp it stays on black screen for a few seconds then reboots again to the Google logo.
Prior to flashing this rom i was on Android 9 (this was android 10 i tried to flash). I can get into fastboot, however every time i try to flash twrp i get : failed (write to device failed (no link). So i was wondering how can i fix this.

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[Q] Boot loop after Google's update

My out of the box Nexus 6 is now stuck looping on and off at the Google boot screen after it tried to install the system update.
I've used the toolkit 1.9.8 to go back to stock. It goes thru the steps appearing to show OKAY and finished at each step. It never reboots the phone at the end. I try to force reboot after waiting for several minutes and it still boot loops. I try again the process again and sometimes it loops and a few times it actually starts up to the welcome screen. However, if I try to root or update recovery (using the toolkit), I get the boot looping again.
Did google bork my phone during a failed update? Is there anything else I can do to completely restore the phone? I've also downloaded the images on google and flashed---same boot loop.
Ultimately, my phone is now booting up to the welcome screen as expected and shows LRX21O. BUT, if I try to do anything (root or recovery), boot loop results again.
(I was able to unlock the phone and know about the usb debug and OEM unlock settings in dev menu, fyi).

HTC One m7wls Unknown boot up Issue

I have an HTC One m7 sprint and recently I encountered something usual in the sense that, my battery run out and I placed it on charge while the phone is off. After awhile I try to boot up the device but it takes forever to boot up. I have installed a cm-13 rom on the device which was very stable. I have twrp 3.1.1 installed on the device. my device is S-OFF and bootloader unlocked. For 3 days now I haven't been able to boot up the device to ROM because its always stuck at the cyanogen logo. Whenever i try to boot to recovery, the twrp logo comes and it takes forever to boot into the recovery menu. To be precise, 10-20 mins to boot to recovery menu. Now what buffles me the most is that, I can't format my data because anytime it starts to formatting process starts I get 2 kinds of red line errors:
E: failed to write /dev/block/mmcblk0p19: I/O error
Error opening: '/cache/recovery/ .version' (Read-only file system)
I haven't been able to Restore my backup because of the error above,
I haven't able to copy files to the internal storage
I haven't been able do anythings significant at the recovery
I can't install new ROM
here are some steps I have taken so far to help fix the problem but to no avail
I have flashed older versions of the custom recovery through fastboot but whenever I boot to the Recovery I still see the twrp 3.1.1 i flashed before the problem happened. Even though my command.exe tells me that the flash was successful but it doesn't overwrite the twrp 3.1.1
I have fastboot erased cache but nothing happened
I have tried to return the device to stock by RUU method but whenever I fastboot oem rebootRUU, the device powers off, reboots to white HTC logo attempts to boot phone instead of going into RUU mode.
I have a hunch that somewhat my internal storage is corrupted and is probably causing these problems but I don't know how to go round it.
Any help will be gratefully appreciated.

Magisk updated today, worked fine, but after rebooting stuck on google logo

I don't think it's bootlooping, it just sits on the splash screen. I can still go to the bootloader and TWRP recovery. What's the best course of action?
I'm also seeing this behavior I think. I did:
1) ./flash-all with Android 9 factory image.
2) Reboot, turn on ADB access etc.
3) Install MagiskManager, latest version 6.0.0
4) Reboot into recovery, and install Magisk v17.2, everything seems okay.
5) Reboot system
After the reboot, it gets stuck on the Google logo and then eventually reboots into recovery...
Anyone else seeing something like this?

Attempted to update TWRP - now cannot get past HTC Logo

So I tried updating my M7 to TWRP 3.2.1-0 by flashing the img file using a slightly older version of TWRP
After installing, wiping cache & rebooting, my phone only gets to the HTC logo, with "Entering Recovery..." message at the top. It doesn't get any further than that. Even more annoying, my ADB has stopped detecting my phone so I can't flash anything else right now
Any help or advice?
Okay after leaving it alone for a while it's suddenly started to work perfectly and boot as normal again...!
Uhhh, I guess mods are free to delete/lock this thread?

[HELP] Stuck in Recovery

I tried flashing the latest lineage microg (this one: https://download.lineage.microg.org/gemini/lineage-16.0-20190604-microG-gemini.zip) and after doing so I can't boot anymore. The loading screen appears, it seems to boot normally for some time and then just restarts. The Mi logo appears again on black ground and TWRP is started. I tried flashing the previous version (20190513) to no avail. What do I do? Thanks a lot for any help.

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