Galaxy S6 G920F unable to mount System in TWRP - Galaxy S6 Q&A, Help & Troubleshooting

I tried to upgrade to from Magisk V6 to V8 it messed up my phone so I restored a backup and all was fine, so I tried installing V8 a different way still failed, so restored backup again but this time I am getting errors that the system cant be mounted. I have tried repairing the system in advanced whipe but that failed so I chose change file system option and changed it to ext4 which it already was then restored backup and it lets me mount the system. But as soon as i restart my phone it just sits on the first Samgung logo screen, and does nothing and when i boot back into TWRP it is back to not mounting system.
What can I do to fix this? I need it done bercause I need my phone for work in the morning.

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help with error unable to mount /data

hey guys
i was installing cm12.1 nightly and i though to fresh install it. so i opened twrp and swiped dalvik cache,cache and data but factory reset failed for some reason.i found out that twrp couldnt format data.so i googled it and found that changing file partition system can overcome this problem so i changed the file partition system to fat. then i tried to install cm12.1 but it got stuck in the boot animation.
then i again tried to factory reset but this time i got error 'unable to mount /data'
i tried cwm and touchwiz recovery but both of them couldnt even format data as it was un mountable
so guys can you help me as my phone is lying dead now and there's nothing i can do about it
if you need any log /screenshot pls let me know
hoping for working solution
having a good day

TWRP Can Not Mount /data or storage

So I've encountered the issue once again where I get a message saying "System UI Has Crashed" and then a crash loop occurs continuously after each boot. So I went to restore my phone from a backup and found that /system, /cache, and /data were all corrupted and could not be mounted by TWRP.
Flashing the BLU_SYSTEM_0.img file using SP Flash Tool fixed the issue with /system, and wiping the cache seems to have fixed it, but I still am getting messages that TWRP can not mount /data and storage and it has been sitting on "Formatting Data using make_ext4fs..." for an extended period. I had attempted "fastboot format userdata" and that didn't fix the issue.
Will TWRP eventually correct this on its own, is there something else I should do, or is my phone just a brick?
Ive had luck letting it sit for LONG time;
but i find TWRP 2.8 seems much better and quicker with wiping...
also Ive had luck using SP FLASH tool flashing ALL parts, (using allview or gionnee complete roms)
reflashing all the partitions to fix corruptions was a pain; but it worked... then I restored a nandroid back to BLU
uchua said:
So I've encountered the issue once again where I get a message saying "System UI Has Crashed" and then a crash loop occurs continuously after each boot. So I went to restore my phone from a backup and found that /system, /cache, and /data were all corrupted and could not be mounted by TWRP.
Flashing the BLU_SYSTEM_0.img file using SP Flash Tool fixed the issue with /system, and wiping the cache seems to have fixed it, but I still am getting messages that TWRP can not mount /data and storage and it has been sitting on "Formatting Data using make_ext4fs..." for an extended period. I had attempted "fastboot format userdata" and that didn't fix the issue.
Will TWRP eventually correct this on its own, is there something else I should do, or is my phone just a brick?
Click to expand...
Click to collapse
Reboot your phone and boot to TWRP again, then try to Wipe > Advanced Wipe > Tick "Data" only > Swipe to Wipe. If it doesn't work, reboot and keep trying until you get tired of it or it eventually works, whichever comes first.

Encryption unsuccessful

Hey there!
I have a problem: My wife's WIKO rainbow 3g suddenly showed this message:
She pressed the button several times, but nothing happened.
I booted the phone into stock recovery and tried to wipe /data, but then it says "mount /data error! Force format /data". It looks like it starts to format, but after a few seconds it ends with no message at all. Tried to reboot afterwards, but now it is stuck in the "Rainbow"-bootscreen.
Tried to update the phone using the WIKO software, but the phone isn't recognized anymore.
It's still on stock recovery, as it isn't rooted yet.
Is it possible to root the phone and install a custom recovery in stock recovery mode? Or is there any other way to make the /data partition accessible again?

[Help] Device not booting after reinstalling stock via dload and factory reset

Hi,
I recently tried to install a custom rom (Resurrection Remix) on the latest EMUI version which resulted in my device not booting anymore.
After several tries I gave up and wanted to simply use stock with root.
I installed SuperSU, but that did not show up in the application menu.
After that I recovered system and boot from a recent full backup and installed magisk.
That resulted in the device not booting anymore at all. This condition stays now.
I then reinstalled the stock rom via dload method, with a factory reset after, but it then started to be stuck in the blue screen with the honor logo.
Is there anything I can do? TWRP is gone, I only get the stock EMUI recovery.
This happened to mee too. You should try a wipe data and cache from recovery, then reboot. It worked for me.
P.s i flashed a stock recovery don't know if TWRP will work the same, try.
After the dload update the stock recovery is installed again, I wiped data and cache already, but that didnt make it work too :/
EDIT: Found the error: The /data partition is unusable in it's current state (f2fs). Is F2FS the default filesystem for /data or do I need to change it to ext4 or something?

HELP!!! twrp unable to mount system (structure needs cleaning)

so like i did with every other phone i flashed a custom rom on my op6. everything was fine i made a backup with twrp on my usb drive, downloaded official gsi RR rom flashed it through twrp. but cause of a lot of bugs, i want my stock oos back, so i booted into twrp, wiped the system partition and tried to resore my backup. after the restore, i got the message "invalid argument" als had unable to mount storage (structure needs cleaning) i have no idea what to do i tried phh again i tried stock oos. also tried repair system to ext4, but nothing seems to work.
can someone please help??

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