Develop Bugs

FIX: failed to mount /efs error message

There are a number of threads throughout xda-developers, but I had a very long journey to find a fix that worked with my T-Mobile T989 Galaxy S2 phone. In a nutshell, sometime over the last week I somehow corrupted my /efs directory/folder enough so that it wouldn't mount. The symptoms I started to have was that I couldn't load any custom ROM without it going into a boot loop eventually. Even the backups that I saved would not work! I was able to use Odin to factory reset my phone back to 2.3.6 gingerbread, and it would run, but if I tried to load any ROM including going thru a Kies factory update, it would fail. (Note I still had a valid IMEI number displayed) Then I saw the failed to mount /efs error on the factory recovery window. So after many attempts to find and try a specific fix for my T989, I came across this thread in the Skyrocket phone section. This guy named icenight89 came up with a method to fix their phones, with a note that it will work on T989's as well.
The fix for me that worked was for me to factory reset to 2.3.6 via Odin. Then load in CWM recovery and then Super-SU to root the phone. Then download a file on icenight89's thread called EFSFix.zip and upload it to your phone. (Nandroid backup first) then boot into CWM recovery and install this .zip file, and reboot, and voila the efs partition is mountable again!! Here is the link to icenight89's thread and in there are the file links: http://forum.xda-developers.com/showthread.php?t=1611796
Hope this can help shortcut the fix for our phones for someone else who runs into this.

E:failed to mount /efs (Invalid argument), Did I brick my tablet?

I bought a new never used Tab 3 for the intended purpose of using it as a universal remote. I wanted to strip it down and started right away with installing custom recovery, or at least I tried. No matter what I did I was not able to get Odin to properly load TWRP. It went through all the steps but I was not able to get into recovery other than stock.
Fast forward to the next day, I finally get it to work and somewhere in this process I somehow deleted or unmounted (I really am not sure) my efs folder/partition. If I try to reset deleting all cache and wiping everything including pulling the battery for a few minutes and flashing the stock ROM again I get hung up at the "SAMSUNG' logo. I have tried several ROMs and even tried using Odin to flash a new pit file with I found HERE. When I load both the pit file and my ROM into Odin it eventually says 'FAIL'. I can flash ROMs all day with no issue.
I can only assume that the error I am getting in recovery that says E:failed to mount /efs (Invalid argument) is my issue.
Adb is not really an option for me since I have little to none, more like none at all knowledge of using it. I assume since I have flashed several tries that USB Debugging is not enabled anyway and isn't enabling it key to using ADB anyway?
I have been at this for 2 full days searching everywhere and trying everything I see. I am at a loss and hate to think this new Tab is already junk.
Any help would be greatly appreciated!

The EMCC or something like that requires replacement

andynroid said:
The EMCC or something like that requires replacement
Click to expand...
Click to collapse
So I should junk it then? I only paid $80 for this Tab.

One trial you may try to flash a Cyanogenmod based ROM see if it can write out the partitions else if no luck time to replace that item as mentioned

I have tried flashing CM and still the same issues.
I have since found out what my issue is (or at least 99% sure), I somehow wiped out my efs partition completely. So running a new pit file with Odin does nothing because the partition is gone.
This is fixable and easy for someone who knows shell, but I don't. So now I am trying to figure it out. It's a matter of pushing the 6 following files to the phone using the adb push [file] /sbin/ command using adb which I have done, now I need to figure out the rest.
e2fsck
mke2fs
parted
resize2fs
sdparted
tune2fs

T
you can't do that in the way you think, it requires disassembling the recovery image, making modifications and repacking then reflashing the image.
If you are using an older recovery, namely twrp, install a newer recovery , check @nels83 's thread for a "modern" twrp build.
You can also try one of my philz builds.
Being as you have been abusing Odin, you may actually have damaged your tab.
BUT if you are connecting to wifi without a problem then it's unlikely that you have damaged your efs partition. It's more likely an error with the recovery build you are using, probably in the fstab.
m

Rogers - Device memory damaged

I have searched through the forum but haven't found any answer. I got this message on my phone 2 days ago,
"Device memory damaged, reset your device". I have tried to reset using the button provided but nothing happens. Have tried to Odin the factory ROM but it fails with "Write operation failed". Have also tried to flash CWM recovery and Philz recovery and they both flash fine but I have the same message when I boot.
Have tried to boot to CWM menu and tried to format/wipe/reset but to no avial. I get error saying can't mount /cache, an't read /cache.
Have not been able to find a Rogers pit file to repartition using Odin. All the files supplied are for SGH-I747 or i9300, I need one for SGH-I747M. Any body has one?
Any way to bring the phone back?

Does Odin flash any part of the stock rom? Which part fails to be written?

HELP! restoring stock rom on Verizon galaxy S5 (G900V)

First of all to admins..., I hope I'm posting this in the right section. If I'm not, please move it or direct me.
I have a Verizon S5 - G900V that is soft bricked and I have been pulling my hair out trying to restore stock rom to it via Odin. It fails every time. I have tried so many versions - some fail with aboot, which I understand means that th version I'm flashing is older and I can't downgrade. Fair enough. The only one that seems to work is G900VVRU2DPD1 (which shows up as the version in recovery mode) but it fails at loading the SYSTEM stage. In Odin on Windows it shows fail (AUTH) an on t device it shows secure check fail: system
Reactivation lock on the device in download mode shows OFF And I can't boot into the OS to verify that.
I have all the necessary device drivers installed in windows.
The device, I believe, is not rooted.
Using kies doesn't work because I asks for for device serial which I d know and does n show under the battery (only shows IMEI an model) and using the Verizon repair Assistant doesn't even see the device
I have wiped cache partition and did factory reset from recovery mode.
I have done exhaustive Google searches an been on many xda dev posts for weeks and not finding anything that works.
I've also tried pushing with adb sideload....didnt work.
The only thing I can think of, and think I might have read somewhere, is that my problems are caused by a locked bootloader. I anyone here able to attest to that?
One other thing...in recovery mode, if I select mount system, it gives errors in red e:Failed to mount /system (invalid argument).
Any experts here able to help me get passed this to successfully flash stock rom (or any rom even modified) back into this device and end my madness?
Any help would be appreciated.
Thanks in advance

Bump

any experts out there able to help me on this one?

Can't access recovery and bootloader

Hi,
I have Samsung Galaxy S4 Mini (serrano3gxx). I was using this ROM and CWM recovery. I really don't know how it happened. My phone shut down and when I booted it, I saw this message "Encryption Unsuccessful", so I was not able to access my storage. Then, I've searched how to fix this. I tried to backup storage in recovery and I got this error every time "Can't mount /system, /cache, /data", even while trying to mount them manually. After a few try (flashing etc.), I've become to not access ROM (also bootloader) and CWM recovery. When I tried to access them, I only got "Black screen" and nothing appeared on screen. Then, I could access "Download Mode". At this point, I've tried to flash another ROMs (including stock ROM) and recoveries via Odin. Firstly, Odin detected my phone but ADB not. Secondly, when I tried to flash something that I mentioned, Odin's log screen stuck on "Initialization" step. I've waited 1 hour only for flashing recovery... Nothing flashed and still stuck same step...
Now, actual situation is that I can't access even Download Mode! Before this, phone was shaking when I plugged it to charger or USB port and tried to power it on. Now, this is also changed, it is not shaking...
Guys, I am saying "wth is it" now. These occurred step by step:
1. Shut down and message "Encryption failed/unsuccessful".
2. Can't mount /system /cache /data.
3. Can't access both of ROM (bootloader) and recovery // Black screen
4. Can't access Download Mode.
Note that, all of required drivers installed, even Kies. By the way, Kies detected my phone but it could not complete loading to recognize.
I've found this article but I don't know if it is solution.
I guess phone's storage is corrupted.
So, my phone's storage is fried? What should I do? Thanks for helps I will get.

Try flashing the complete stock rom not just the recovery. Or find a fix and flash it!!

Maybe you should get a pit file and flash that. Reanimated a S3 mini with that.

kurtn said:
Maybe you should get a pit file and flash that. Reanimated a S3 mini with that.
Click to expand...
Click to collapse
As I wrote, I can't access/reach recovery and download mode. How can I do that if you know it? I am still searching how to fix this but it is hopeless case I guess. "getting a pit file" is ok. I found it for a few roms including stock rom. But how can I flash it? I could not find this.