Unable to mount /data - Can't flash using MiFlash - Looking for help. :(

[Sephema]

Every time I open TWRP(V2.8.6.0) this message shows on the log.

E: Could not mount /data and unable to find crypto folder.
E: Unable to mount '/data'
E: Unable to recreate /data/media folder
Updating partition details...
E: Unable to mount '/data'
..done
E: Unable to mount storage.
E: Unable to mount /data/media during GUI startup.
Full SELinux support is present.
E: Unable to mount /data/media/TWRP/.twrps when trying to read settings file.
E: Unable to mount '/data'
MTP Enabled
E: Unable to mount '/data'

I am trying to restore from Stock Partition but it seems the update doesn't fix the partition because of this error.
I think my userdata.img is broken but I don't know how to fix it. I even tried to flash using MiFlash but I wasn't able to flash because of my current partition. I can access fastboot, recovery, adb, and OTG. Can someone please help me with this problem. I've been trying to search for a fix for this problem for a looooong time.

 

[ashish289]

Every time I open TWRP(V2.8.6.0) this message shows on the log.



I am trying to restore from Stock Partition but it seems the update doesn't fix the partition because of this error.
I think my userdata.img is broken but I don't know how to fix it. I even tried to flash using MiFlash but I wasn't able to flash because of my current partition. I can access fastboot, recovery, adb, and OTG. Can someone please help me with this problem. I've been trying to search for a fix for this problem for a looooong time.

try this
reboot in fastboot mode and type these cmds in adb/fastboot
fastboot erase system
fastboot erase userdata
fastboot erase cache

and then flash fastboot miui rom using miflash

 

[Sephema]

try this
reboot in fastboot mode and type these cmds in adb/fastboot
fastboot erase system
fastboot erase userdata
fastboot erase cache

and then flash fastboot miui rom using miflash

I've tried it but it fails.

Here are the results.

E:\platform-tools>fastboot erase system
******** Did you mean to fastboot format this partition?
erasing 'system'...
FAILED (remote: failed to erase partition
)
finished. total time: 0.011s

E:\platform-tools>fastboot erase cache
******** Did you mean to fastboot format this partition?
erasing 'cache'...
OKAY [ 0.006s]
finished. total time: 0.007s

E:\platform-tools>fastboot erase userdata
******** Did you mean to fastboot format this partition?
erasing 'userdata'...
FAILED (remote: failed to erase partition
)
finished. total time: 0.011s

E:\platform-tools>

 

[ashish289]

I've tried it but it fails.

Here are the results.

bootloader locked or unlocked ? if locked then unlock the bootloader