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[Q] [HELP] N8000 : E: failed to mount /efs (invalid argument)

Hi guys ,
I really appreciate all the help you could do to me ,
I have a problem , that I can't install any custom rom and the error i receive is "E: failed to mount /efs (invalid argument) "
So I tried to flash the stock rom via odin after downloading it from sammobile and it did flash it but it stuck on samsong logo
tried flashing TWRP and installing Cyanogen but with no luck , stuck on cyanogen logo
tried omnirom and Gnabo , and the same problem it stuck on the logo ,
and when i go to the mount section on the custom recovery , "efs" is not mounted and it shows 0mb size
tried CWM and same problem
tried using adb while in CWM but I can't get a shell , it says file not found when using"adb shell" command
I tried re-partitioning using a "pit" from a post (not 100% sure it is for the same region but is said for n8000) and it finished successfully but still with the same problem
any ideas ?

Take it to a service center.

[Completed] Help for Lenovo S920-row softbrick: bootloop

Hi! After how many days of searching for sol'ns, I couldn't fix the s920 of my friend.
History: I rooted and installed twrp recovery, and forgot to unlock the bootloader of the phone (I didn't done any nandroid backup ). I did a basic factory reset then when I flashed a custom rom, it failed . Then when i rebooted the phone, it was stucked at bootloop. I couldn't access bootloader (since it wasn't unlocked) but I can still acces the twrp recovery. Then I decided to download it's stock rom/firmware but it failed. The error was showing E: unable to mount /data, unable to mount /emmc, unable to mount storage.
Is there any way I can fix this? I tried wiping again the data and storage but it shows the same error
I tried using spflash tool but flashing also failed, it can't detect the phone. The mediatek preloader USB VCOM appears at first then after 1-2 seconds it disappears. When i open the driver, it shows the phone isn't connected (code 45). I badly ne.eded help . Thank you

XDA Visitor said:
Hi! After how many days of searching for sol'ns, I couldn't fix the s920 of my friend.
History: I rooted and installed twrp recovery, and forgot to unlock the bootloader of the phone (I didn't done any nandroid backup ). I did a basic factory reset then when I flashed a custom rom, it failed . Then when i rebooted the phone, it was stucked at bootloop. I couldn't access bootloader (since it wasn't unlocked) but I can still acces the twrp recovery. Then I decided to download it's stock rom/firmware but it failed. The error was showing E: unable to mount /data, unable to mount /emmc, unable to mount storage.
Is there any way I can fix this? I tried wiping again the data and storage but it shows the same error
I tried using spflash tool but flashing also failed, it can't detect the phone. The mediatek preloader USB VCOM appears at first then after 1-2 seconds it disappears. When i open the driver, it shows the phone isn't connected (code 45). I badly ne.eded help . Thank you
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Greetings,
Thank you for using XDA Assist. First, please create an account so you can post in other forums. After that, you can ask your question here:
Android Q&A
You'll find expert advice there. Good luck and welcome to XDA!

[Completed] odin fails to flash official rom after reseting efs

My phone is Samsung Note 4 (SM-N910C) (XFM-N910CXXU2COJ5)
Earlier today i reseted efs using z3,but when i tried to write back the cert file it failed ;
So i decided to download official rom and flash it with odin, but strangely it failed to, and now it its stuck on(Firmware upgrade encountered an issue.Please select recovery mode in kies & try again).
Please i need your help on what to do, am i supposed to repair refs first so that odin could flash the official rom?

Sylar Rebel said:
My phone is Samsung Note 4 (SM-N910C) (XFM-N910CXXU2COJ5)
Earlier today i reseted efs using z3,but when i tried to write back the cert file it failed ;
So i decided to download official rom and flash it with odin, but strangely it failed to, and now it its stuck on(Firmware upgrade encountered an issue.Please select recovery mode in kies & try again).
Please i need your help on what to do, am i supposed to repair refs first so that odin could flash the official rom?
Click to expand...
Click to collapse
Greetings and welcome to assist. Have you tried using kies emergency firmware recovery ? It worked for me on the same device
Good Luck
Sawdoctor

need help with my galaxy s7

Please help i got stuck on samsung logo when i tryed to root my phone
i installed twrp over odin and then i flashed superSU but i got stucked
i tried to wipe data, cache etc. but twrp shows me:
unable to mount storage
failed to mount /data (invalid argument)
please help

Flash the stock firmware through odin. Which model+csc phone do you have?

phone not booting up help please....!!

Yesterday My galaxy grand duos suddenly got turned off and
Then it got struck in a bootloop for no reason !!!
When I boot into twrp then it doesn't mounts system/ preload and data partition ... And shows invalid argument....
I had aicp 6.0 installed(custom ROM)
Help please I can't loose my device ...

pratyaksh tyagi said:
Yesterday My galaxy grand duos suddenly got turned off and
Then it got struck in a bootloop for no reason !!!
When I boot into twrp then it doesn't mounts system/ preload and data partition ... And shows invalid argument....
I had aicp 6.0 installed(custom ROM)
Help please I can't loose my device ...
Click to expand...
Click to collapse
Best thing to do is flash stock rom via odin and start again - this will wipe the phone and restore stock firmware
You will need
odin
your phones firmware
usb cable
samsung usb drivers
a windows pc
Best search your device specific xda forum for firmware and how to's or you can get firmware via the sammobile website

Can't I flash a zip file...
How to flash firmware ... Through Odin can you elaborate
Which file is needed for that... I know how to flash recovery but not firmware

pratyaksh tyagi said:
Can't I flash a zip file...
How to flash firmware ... Through Odin can you elaborate
Which file is needed for that... I know how to flash recovery but not firmware
Click to expand...
Click to collapse
like I said - look at your phone device specific forum for how to's
https://forum.xda-developers.com/showthread.php?t=2751369
https://forum.xda-developers.com/showpost.php?p=61733408&postcount=3
you can google how to use odin but the instructions are on the first link given with odin itself in the post attachment

Hey buddy I am not able to flash through Odin can you please help..
every time I get struck on initialising or setup connection..: messgage

pratyaksh tyagi said:
Hey buddy I am not able to flash through Odin can you please help..
every time I get struck on initialising or setup connection..: messgage
Click to expand...
Click to collapse
Either
1 - you have not put your phone into download mode and pressed vol up to start connection
2 - you have not installed the samsung usb drivers
http://developer.samsung.com/galaxy/others/android-usb-driver-for-windows
if everything in odin is working you will see com:number in a coloured box under com:id on the left hand side of odin when your device is connected

The com:5 is visible ...
Kies is also not detecting my phone
I'll try after installing drivers

Not able to flash !!!