E: Failed to mount/efs (Invalid argument) on Samsung galaxy note 2 - General Questions and Answers

Hello everyone, can someone help me please. I'm stuck on Samsung Logo and then it goes to Android system recovery <3e> with options:
reboot system now
apply update from ADB
apply update from external storage
wipe/data factory reset
wipe cache partition
apply update from cache
A triangle with a exclamation mark
No command
E: Failed to mount/efs (Invalid argument)
E: Failed to mount/efs (Invalid argument)
I have personal things on Samsung galaxy note 2 and I don't want it to get deleted. I have tried wipe cache partition because I have read it won't delete any personal data, but still note 2 didn't work.
Can anyone help me get back into Samsung note 2 without wiping it.
Thank You.

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Nexus 5 bricked during wipe cache... .-.

I installed android 5.0 via ota, next i go into recovery mode and i wiped cache...
but the wipe cache never finish... so i force reboot the phone, and now don't boot
i go again to recovery and it's say:
failed to mount /cache (Invalid argument)
Can't mount /cache/recovery/log
etc....
how to fix!?
the phone is all stock, i never modified this phone....
i wiped cache again and now the phone boot, but can't install any app (error -505)

[Q] GT-I9128E running into E:failed to mount /data failed to mount /cache

hello guys,
first of all i have read many posts about the problem and have tried most of them:
secondly:- i am sorry maybe it is not the right section but my phone model doesn't exit here
the problem in details : my phone is Galaxy Gt-I9128E
it freezes on Samsung logo , tried recovery boot with power volume up home key , i see the 6 recovery options in blue and
Successfully applied multi-CSC ." in yellow
and in red :
E:failed to mount /data (Invalid argument)
can't mount '/data' (Invalid argument)
E:failed to mount /data (Invalid argument)
E:Can't mount /data/log/recovery_log.txt
E:Can't mount /cache/recovery/last_install
i have tried the 6 recovery system options
1 from ADB : adb shell : connection closed but see the device some times
2 from external storage : downloaded the firmware to external sd card but the phone shut down every time trying to install it.
3 wipe data : wiped
4 wipe cache partition : wiped
download firmware with Odin 3.7 and 3.10 : Pass reboot but the same problem
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[Completed] P5Quad/Xolo Q800 Bricked error mounting /data

I've received suddenly an error about "gapps stopped working" and my phone shut down. After that I couldn't power it on, it gets stuck at the logo screen.
After that, I've power it on in the recovery mode, and I chose Wipe Cache Partition (big mistake I think). After this process it won't power on even in the recovery, so I followed a tutorial and I put CWM.
Now, I can power it on in the recovery mode but it stills get stuck at the logo screen.
I've tried many many ROMs from Xolo Q800, Gionee but I can't make it start.
I can't mount /data, I get "Error mounting /data"
I can't Factory Reset, I get:
"
Formatting /data...
E:format_volume: make_extf4fs failed on /dev/block/mmcblk0p7
Formatting /cache...
E:format_volume: make_extf4fs failed on /dev/block/mmcblk0p6
Formatting /sd-ext...
Formatting /sdcard/.android_secure...
Data wipe complete.
E:Can't mount /cache/recovery/log
E:Can't open /cache/recovery/log
E:Can't mount /cache/recovery/last_log
E:Can't open /cache/recovery/last_log
"
I've heard that I could make it start with a backup, but I can't find any backup. I've found one but it is for TWRP and I have CWM.
If I try to change it from CWM to TWRP I can't. It says that has been installed successfully but when I get in the recovery mode it starts with CWM not with TWRP.
Can anyone please help me? I don't know what to do...
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XDA Visitor said:
I've received suddenly an error about "gapps stopped working" and my phone shut down. After that I couldn't power it on, it gets stuck at the logo screen.
After that, I've power it on in the recovery mode, and I chose Wipe Cache Partition (big mistake I think). After this process it won't power on even in the recovery, so I followed a tutorial and I put CWM.
Now, I can power it on in the recovery mode but it stills get stuck at the logo screen.
I've tried many many ROMs from Xolo Q800, Gionee but I can't make it start.
I can't mount /data, I get "Error mounting /data"
I can't Factory Reset, I get:
"
Formatting /data...
E:format_volume: make_extf4fs failed on /dev/block/mmcblk0p7
Formatting /cache...
E:format_volume: make_extf4fs failed on /dev/block/mmcblk0p6
Formatting /sd-ext...
Formatting /sdcard/.android_secure...
Data wipe complete.
E:Can't mount /cache/recovery/log
E:Can't open /cache/recovery/log
E:Can't mount /cache/recovery/last_log
E:Can't open /cache/recovery/last_log
"
I've heard that I could make it start with a backup, but I can't find any backup. I've found one but it is for TWRP and I have CWM.
If I try to change it from CWM to TWRP I can't. It says that has been installed successfully but when I get in the recovery mode it starts with CWM not with TWRP.
Can anyone please help me? I don't know what to do...
Click to expand...
Click to collapse

Question Phab Plus "failed to mount /cache (invalid arguments)"

My Lenovo Phab Plus stuck on Lenovo logo I accidentally turn it off after I wiped data/factory reset.
Now every time I open the recovery it's says failed to Mount Cache (Invalid Argument).
I tried to format the cache partition throw fastboot but it failed.
and I can't use ADB because the debug USB was disabled.
I also tried to install tweak but didn't work.
Does anyone know how to fix this problem?
Sorry about my poor English

Samsung Galaxy S4 mini GT-I9195 does not boot

Hi there,
I was given a Samsung Galaxy S4 mini GT-I9195 by friend. The phone unfrotunately does not boot anymore. Upon pressing the power button the phone vibrates and proceeds to the "Samsung Galaxy S4 mini GT-I9195" logo screen. The logo is displayed for a couple of seconds, before the screen turns black. In order to restart the phone you need to remove and reinsert the battery, because pressing the power button does not help.
The phone still runs the original software, as far as I know. So no custom rumos, unlocked bootloaders or the like.
Entering recovery mode I am presented ith the following error message:
E: failed to mount /efs (Invalid argument)
E: failed to mount /system (Invalid argument)
Selecting "wipe cache partition" produces the following error messsages:
E: failed to mount /cache
E: Can't mount / cache/recovery/log
E: Can't open / cache/recovery/log
Selecting "wipe data/ factory reset" produces these errors:
E: format_volume: make_extf4fs failed on /dev/block/platform/msms_sdcc.l/by-name/userdata
Is there any chance left for me to revive the device or do I have a Samsung made paperweight?
Thanks a bunch!
Ron

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