ZTE BLADE X9 : failed to mount (invalid argument) - General Questions and Answers

Hi there:
Newbie here, I have facing problem with this device (ZTE V5 PRO N939SC aka Blade A711) .
with this following error:
e: failed to mount:/dev/block/bootdevice/by-name/cache ext4 (invalid argument)
can't mount /cache/ recovery/log
can't open /cache/ recovery/log
e: failed to mount:/dev/block/bootdevice/by-name/cache ext4 (invalid argument)
can't mount /cache/ recovery/log
I can't even boot the device
wipe cache/partition and factory reset
cant even work..
Pls. help and thanks in advance.

jenuel_11 said:
Hi there:
Newbie here, I have facing problem with this device (ZTE V5 PRO N939SC aka Blade A711) ......
Click to expand...
Click to collapse
I don't have this device but, you should be able to obtain some member guidance within one of the following threads that's specific to the Blade device.
https://forum.xda-developers.com/showthread.php?t=3342637
https://forum.xda-developers.com/showthread.php?t=1987960
https://forum.xda-developers.com/showthread.php?t=1644220
Good Luck!
~~~~~~~~~~~~~~~
I DO NOT provide support via PM unless asked/requested by myself. PLEASE keep it in the threads where everyone can share.

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E.Failed to mount /efs (invalid argument) dm verity Error...

Hello i hope everyone can help me
i buy the samsung sm-g920f from a person.
He say the telefon have a firmware problem and i think i can repair that.but now i see this telefon have many Problem and hope anyone can help me.
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I try to root.
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caplagi21 said:
Hello i hope everyone can help me
i buy the samsung sm-g920f from a person.
He say the telefon have a firmware problem and i think i can repair that.but now i see this telefon have many Problem and hope anyone can help me.
This Telefon Stuck on Samsung Logo.
I try it to flash original stock rom.
I try to root.
Nothing helps.
In Cwm mode read the telefon
No Support Single -sku
Supported API:3
E.Failed to mount /efs (invalid argument)
E.Failed to mount /efs (invalid argument)
E.Failed to mount /efs (invalid argument)
dm verity Error...
i dont have a efs backup i try it with efs from another s6 phone
i Try to fix that with adb/fastboot
cwm error
update from external storage is disabled
twrp sideload
adb shell error closed.
Please help me
Click to expand...
Click to collapse
Hi, did anyone help you with this problem, I have a similar problem and dont think I'm gonna get a reply.
I did search topics that had similar problems and solutions but didnt work for me

failed to mount '/dsp' (invalid argument) in leeco le 2 us model x522

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Pham_Duy2 said:
Hi, after i flashed stock rom by using fastboot..........
Click to expand...
Click to collapse
I don't have this device but, the following area of the forum is specific to your device and variants.
https://forum.xda-developers.com/le-2
With that guidance...
You should be able to obtain some member guidance within the following thread that's specific to your device.
https://forum.xda-developers.com/showthread.php?t=3515555
Good Luck!
~~~~~~~~~~~~~~~
UNLESS asked to do so, PLEASE don't PM me regarding support. Sent using The ClaRetoX Forum App on my SM-G900T device.
Pham_Duy2 said:
Hi, after i flashed stock rom by using fastboot on my computer after the i was in bootloop, and i was try to format my data and install my new rom, but everytime i format my data or instal new rom using twrp it say failed to mount '/dsp' (invalid argument), i was try format my data over and over time but it the same. I was try to change file system but it continue to say failed to mount '/dsp' (invalid argument). Please help me, thanks you.
Click to expand...
Click to collapse
hi, have you fix the problem ? cause i got the same problem

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