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Stuck with TWRP recovery & bootloader, deleted everything by accident

I was trying to downgrade and flash the shield factory image but i didn't backup and wiped everything, and i tried flashing in twrp and when i flash twrp just restarts and it won't work, I need help, anything in desperate need of it or i'll just end up selling this thing for parts, i can't boot the OS just bootloader and twrp

Wierd recovery problem

I got a nexus 5 off of eBay, the seller said he had tried to root it and failed so I thought I would have a crack at it.
I thought it would be an easy restore but I ran into a few problems:
Phone originally came with 6.0.1 installed.
On android 5+ I could not access the standard recovery screen, and when I pressed power+volUp it just said formatting /data and would not move from that.
Rolled back to 4.4 and I got into the ususal recovery screen.
Tried to do a factory reset, but it again stuck at formatting /data.
I left it the entire night while I slept and it was still saying formatting /data. in the morning, nothing had changed.
Trying to boot the phone normally just left it on the 4 startup screen.
I've tried doing a full flash of stock android with each seperate part manually.
Also /data is unable to be mounted in any custom recovery, like it is corrupted or locked somehow.
With the stock recovery, it cannot be detected by adb, but in cwm it can.
EDIT: checking the /data folder in adb shell shows it's completely empty, and the same with system even after flashing and flashing again.
Can anyone advise me as to what might be the problem here?

Reflash all partitions manually, including userdata.img file. After flashing the last partition, boot directly into stock recovery and perform a factory wipe, then reboot.

Done that multiple times, I get the same result on stock android.
I don't want to root or anything like that right now, just get it back to a working state.

So you flashed the userdata.img file?

audit13 said:
So you flashed the userdata.img file?
Click to expand...
Click to collapse
yes multiple times

If you flashed userdata.img multiple times and the phone still can't perform a factory reset, the emmc chip may be damaged.

[Fixed]Bricked phone? error cache not mounted

so i wanted to backup my oneplus one using twrp 3.0 and for some reason i decided to wipe the cache before i backed it up. I went to wipe (just the regular cache) and it kept trying to wipe but it never succeeded so i just forced rebooted it went back to twrp and backed up my phone. Once the backup was done i tried to boot it up and i was met with a boot loop. Then i kept rebooting my phone and no luck. then i tried to completely wipe my phone. well just a factory reset. it didn't work i was greeted with an error saying my cache is not mounted or something like that. so now i cant even wipe anything at all and i think twrp has a feature where you can access files from recovery and that doesn't work for me. adb isnt working either i was trying to push a file. What im trying to do is flash a newer version of twrp or try to adb sideload my same rom. but i dont have access to my same rom cause the links are down. my rom is minimal os btw. any ideas ?
Edit: I've fixed the problem by booting into fastboot and flashing a newer version of twrp 3.0.2. then i wiped the cache and it was successful. then i booted up and it works!

Accidently wiped /dev/block/sda, now won't get past boot logo

So i was trying to create a bootable usb for linux from my phone. I'm 90% sure my usb was mounted at /dev/block/sda, i did my "dd" command and unplugged the usb only to notice it was unchanged and my device was frozen. After powering off, i was brought directly to the download boot.
So first I tried flashing mu stock firmware, then i tried flashing Lineage Os with twrp. The boot logo just continues. I tried formatting with twrp, wiping cache with default recovery. I tried recovery. I just keep getting an error about EFS not mounting, but i thought that only affects radios/modems.
I don't know what to do Any ideas?

Encrypting device gone wrong, android and recovery broken now, seems softbricked?

So, I made a big mistake.
I tried to encrypt my device, but it got stuck at 100%, so i rebooted it and now it's completely messed up.
When i boot it, it asks me for a password, when i enter it, it says decryption unsuccesful and my data is corrupt.
It gives me the option to reset the phone, which is fine, but it reboots the phone into recovery.
But i can't get into recovery, i can't read it properly but as far as i understand it fails to mount /data 5-ish times and then reboots again and tries to boot android again, bringing me to the password screen once again.
I don't care about data, i have backups, but i just want my phone working again.
TL : DR: phone boots, asks password, says data is corrupted, reset phone, goes into recovery, fails to mount partition, reboots, back to ask password.
If i have to do something in ADB let me know, i'm far from good with it but i can at least get it working...
Edit: RECOVERY WORKS! I got that one working again! Problem is that it still can't mount the /data partition so i can't seem to reset/wipe the phone properly.
Edit 2: Device is up and running again. I re-flashed the recovery via the bootloader and ADB, did a full wipe with the recovery because the re-flash fixed it and the wipe fixed the mount problem. After the /data partition could finally be mounted again i just flashed a ROM as usual with gapps and problem solved!
The microSD was broken too but after formatting that with a PC the phone could use it properly again. Did take a few tries tho, no idea why.