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[Q] failed to mount /data

Hi,
My Acer Iconia A500 is in serious trouble.
I use TWRP v2.1.3 and Bootloader Skrilax_CZ's V8.
My problem started with a loop at startup of Android, not passing the cyanogenmod load screen.
I had no backup to restore.
Used an external memory card to install android rom again.
But I can not mount / data.
In the TWRP screen:
- Install / sdcard/cm-100201211140-UNOFFICIAL-a500.zip ...
Fiding update package ...
Opening update package ...
Installing update ...
* Verifying filesystem ....
* Verifying partition sizes ...
E: Ubable to mount / data
E: Failed to mount / data (Invalid argument)
E: Failed to mount / data (Invalid argument)
The option to mount also can not check the option: mount data.
Could anyone help me?

ERROR WHILE RESTORING /DATA! gs4 i9500 5.0.1 with cwm Please HELP :(

Restoring data...
Error while restoring /data!
tar: write error: Read-only file system
rList-com.android.setting. AppPicker
rList-com.android.setting.MediaFormatsd
rList-com.android.setting.ConfirmLockPasswor
sans. loc
DroidSans.ttf
DroidSans-Bold.ttf
Error while restoring /data!
I: Can't partition non-vfat: datamedia
I:Can't format unknown volume: /emmc

/cache failed to mount ( invalid Argument)

my phone is into bootloop whenever i try to factory reset or format cache partition it says failed to mount cache invalid argument . any help guys ?

[HELP] Cant mount /data /system /cache, Unknown partition 'osip' .

Model: T00F
Intel z250 1.6 Ghz
Suddenly my apps started closing in custom rom (montana rom) like contacts,camera etc.
So i tried to restarted my phone but it stuck on boot animation.
Then i tried to wipe and flash this rom again from TWRP 3.1 but it showed me error:-
E:Unkown File System: 'osip'
E:Unable to find partition size for '/misc'
E:Unable to set bootloader message.
Could not mount /data and unable to find crypto footer.
Failed to mount '/data' (Invalid argument)
Unable to recreate /data/media folder.
Failed to mount '/system' (Invalid argument)
Failed to mount '/cache' (Invalid argument)
Failed to mount '/data' (Invalid argument)
Now i cant wipe, change file system, install and mount.
Here's other things i've tried:
1.) Re-partition my Android
error: /parted: line 1: syntax error: unexpected word (expecting ")")
2.) Debrick Asus Zenfoen 5 with no fastboot, no recovery, and ruined partitions.....
(https://forum.xda-developers.com/zenfone-5/help/debrick-asus-zenfoen-5-fastboot-t3377455/page1)
error: debrick.bat didnt worked properly.
cannot adb sideload my firmware.. same error (unable to mount /cache)
3.)Hard Bricked Zenfone Unbrick (Last method to try)
https://forum.xda-developers.com/android/development/hard-bricked-zenfone-unbrick-method-to-t3131911
error: failure FW + OS cannot be downloaded
PLEASE HELP ME...
I cant afford new phone this time.

yes I gived like error like too
FW + OS cannot be downloaded

tried to root

Hello!
I tried to root my SM-G950F but i made a mistake somewhere an i pulled the usb-c from the phone. witch have resulted in i get i bunch on errors when i enter the recovery mode. something along the lines of:
1. No command
2. fail to open recovery_cause(no such file or directory)
E: unknown volume for path /odm
E: unknown volume for path /vendor
E: unknown volume for path /odm
E: unknown volume for path /vendor

No one?

Try flashing a stock rom through Odin, then installing twrp again.