Develop Bugs

Failed to mount /efs error

Hi all,
i've search and tried most of the methods on threads with similar issue but to no avail.
So i'm posting my situation here hoping someone with the expertise can help me.
My IMEI became null/null after flashing Criskelo rom. I had previously saved a copy of my efs.img on my PC.
When restoring my EFS backup, it says "/dev/block/mmcblk0p3: write error: No space left on device"
So i used Odin, flash a stock ROM with pit, bootloader, pda, phone and csc.
The flashing was successful with no errors but stuck samsung logo for as long as i can wait.
I then booted to stock recovery and notice it says "E: failed to mount /efs (invalid argument)"
so i did a wipe data/factory reset and wipe cache partition.
Reboot. Still stuck at Samsung logo.
I tried to sideload my efs.img but there is a "E: signature not verified" error
So i thought what the heck and flashed Chenglu's CWM via Odin. Phone successfully boot to CWM
i wiped data/factory reset, cache and dalvik. Reboot and still stuck at Samsung logo.
I then tried flashing CF-Autoroot, it was ok as well with no issues but stuck at Samsung logo again.
Rebooted back to CWM, Tried to mount efs, got an error saying error mounting efs
i flashed various stock rom via Odin, all process PASS with green but mostly stucked at samsung logo...
is my device soft bricked? or is my sd card is dead? or is my efs partition fried?
anyone kind enough to share his complete backup file? my country sells the n7105.
i bought the export n7100 instead so its kinda hard for me to find a friend with the same fone.
i have been flashing roms since the good old Galaxy S and this is the 1st time i cannot revive my phone from past experience...

bump for you, im facing the same error.

Hi mate, im not sure if this would work but have you tried the super wipe mod here http://forum.xda-developers.com/showthread.php?t=1925402.
worth a shot cant make it any worse.
also checkout this for a solution http://forum.xda-developers.com/sitesearch.php?q=E: signature not verified

Hi thanks... sadly links are down. will try the super wipe thing.
i remember doing the wipe in TWRP before flashing Criskelo.
i did get away with the signature thing. its easy. just turn it off in CWM.
i went to my local samsung service center and they rejected my phone as its considered "export" to them

did the super wipe.
Flash stock with Odin.
Still keep getting stuck at samsung logo on boot and recovery still shows : Error: Can't mount /efs

cant you restore it to factory settings and return it to where you bought it from.

GezDixon said:
cant you restore it to factory settings and return it to where you bought it from.
Click to expand...
Click to collapse
mine is under warranty, so I could try to restore to stock rom which gets stuck at the samsung logo.
problem is that going into download mode shows this :
custom binary download : 12
Current binary : samsung official
system status : custom

iv had alook round and cant see anything that will fix it, in odin theres a clear efs button.
edit: just found this info on a usb jig that resets counter to 0
http://forum.xda-developers.com/showthread.php?t=1934771

how do I go about clearing the EFS since it is greyed out.
so there's no work other solution to this, except for getting the jig?

likepeas said:
how do I go about clearing the EFS since it is greyed out.
so there's no work other solution to this, except for getting the jig?
Click to expand...
Click to collapse
Edit the ini file for Odin and set PhoneEFSClear=1 that'll check the EFS Clear option (even though it remains grey). See if that helps.

likepeas said:
mine is under warranty, so I could try to restore to stock rom which gets stuck at the samsung logo.
problem is that going into download mode shows this :
custom binary download : 12
Current binary : samsung official
system status : custom
Click to expand...
Click to collapse
same. my counter is 15
but i already ask a friend in malaysia to help me with samsung service center malaysia this weekend
i don't have the phone now. hope they don't nitpick on the counter thing

i got the same problem
xenocide976 said:
Hi all,
i've search and tried most of the methods on threads with similar issue but to no avail.
So i'm posting my situation here hoping someone with the expertise can help me.
My IMEI became null/null after flashing Criskelo rom. I had previously saved a copy of my efs.img on my PC.
When restoring my EFS backup, it says "/dev/block/mmcblk0p3: write error: No space left on device"
So i used Odin, flash a stock ROM with pit, bootloader, pda, phone and csc.
The flashing was successful with no errors but stuck samsung logo for as long as i can wait.
I then booted to stock recovery and notice it says "E: failed to mount /efs (invalid argument)"
so i did a wipe data/factory reset and wipe cache partition.
Reboot. Still stuck at Samsung logo.
I tried to sideload my efs.img but there is a "E: signature not verified" error
So i thought what the heck and flashed Chenglu's CWM via Odin. Phone successfully boot to CWM
i wiped data/factory reset, cache and dalvik. Reboot and still stuck at Samsung logo.
I then tried flashing CF-Autoroot, it was ok as well with no issues but stuck at Samsung logo again.
Rebooted back to CWM, Tried to mount efs, got an error saying error mounting efs
i flashed various stock rom via Odin, all process PASS with green but mostly stucked at samsung logo...
is my device soft bricked? or is my sd card is dead? or is my efs partition fried?
anyone kind enough to share his complete backup file? my country sells the n7105.
i bought the export n7100 instead so its kinda hard for me to find a friend with the same fone.
i have been flashing roms since the good old Galaxy S and this is the 1st time i cannot revive my phone from past experience...
Click to expand...
Click to collapse
plz help im doing factory restet with odyn and evrey stock firemwere from difrent country doesnt worck. the phone is stoping on samsung logo ,i can instal custum recovery by odin but , after instaling in custum recovery omega 7.2 or cm10 the phone is not boting its stoping on first boot animation plz help, sorry for my bad eglish

i have the same problem ????

same here
Has anyone found a solution to this yet?! I have the exact same issues, phone died, then when powered back on was stuck in a boot loop, returned to stock and got the unable to mount efs invalid argument text, now its still stuck in a boot loop with a flash count of 8 so cant be sent in for repair, any advice is greatly appreciated!

I have the exact same problem
i have the same problem . . and to make matter worse i don't even have any warranty . . :crying: . ..
is there no way to to get the phone to boot in to the OS regardless of any functionality ??

I couldn't find the topic where i learned this info, but it's something like this: if you flashed the modem (i think so) and you have an EFS backup like me, you just need to flash any other thing and restore the EFS backup. But, if you don't, you must stay with the modem.
okay, i just found it: http://forum.xda-developers.com/showthread.php?t=2332913
Good luck. (And press the thanks button if i've helped you :fingers-crossed: )
Enviado de meu GT-N7100 usando o Tapatalk now Free

same problem, korean note 2
lost my IMEI, no EFS back up , cant detect internel storage ( SD card works though )
i have access to DL mode, i can flash recovery , but stuck in boot loop for flashing ROM

blueazure said:
same problem, korean note 2
lost my IMEI, no EFS back up , cant detect internel storage ( SD card works though )
i have access to DL mode, i can flash recovery , but stuck in boot loop for flashing ROM
Click to expand...
Click to collapse
Seem to have been struck by the same issue and no efs backup prior to this.
Custom binary download: 0
Completely stock Note 2 just got screwed after flashing new 4.4.2 ROM for my country via Odin, the ROM booted fine, transferred contents to PC, factory reset the phone, set google account and reinstalled apps and transferred saved data back. Data, phone calls and everything else was working. The phone got to 10% battery lost network (this is normal lately lol) and shut off when battery died. Phone never rebooted and stuck at Samsung logo. Recovery reports "/efs I/O mount error" tried the guides by ketan and a couple others nothing seems to help

same applies to me. Perhaps some hardware fried is my guess.

[Q] CM10 m2 Encryption Issue

Ok. I foolishly enabled encryption on my i711 and after putting in the password, the volumes unlock and the system starts. The problem is that if the screen goes off for any reason, the phone reboots. Tried all sorts of things to correct and decided I no longer wanted the phone encrypted. There is no way back. Ok, so I thought I could do a factory reset... No dice. The phone reboots and all is still encrypted and there.
Next I tried clockworkmod but couldn't do ANYTHING there because the encrypted volumes aren't mountable. I couldn't factory reset, install a new rom, etc.
Next I went to ODIN and tried to repartition. No luck there either. I flashed clockworkmod again for good measure and even tried Nand Erase All.
After this I booted into the phone and tried to repartition... Now I have a phone that displays the lovely CM10 boot screen but never gets passed that. I can still get into recovery.
Any thoughts on how to undo the encryption and reflash a rom?

fza99 said:
Ok. I foolishly enabled encryption on my i711 and after putting in the password, the volumes unlock and the system starts. The problem is that if the screen goes off for any reason, the phone reboots. Tried all sorts of things to correct and decided I no longer wanted the phone encrypted. There is no way back. Ok, so I thought I could do a factory reset... No dice. The phone reboots and all is still encrypted and there.
Next I tried clockworkmod but couldn't do ANYTHING there because the encrypted volumes aren't mountable. I couldn't factory reset, install a new rom, etc.
Next I went to ODIN and tried to repartition. No luck there either. I flashed clockworkmod again for good measure and even tried Nand Erase All.
After this I booted into the phone and tried to repartition... Now I have a phone that displays the lovely CM10 boot screen but never gets passed that. I can still get into recovery.
Any thoughts on how to undo the encryption and reflash a rom?
Click to expand...
Click to collapse
I have some very bad news for you.... Encryption is a one way street. Once encrypted the only way back is to flash stock via fastboot.
I can't even start to explain how to use fastboot as I have never been in a situation where I have needed it.
recoveries lose all access on encrypted devices so this is the only way.
Here is some links to get you started... Please do research before you begin the process and make sure you've obtained the appropriate files. I will take no responsibility for bricking your device.
Flashing via Fastboot:
http://forum.xda-developers.com/wik...id#Android_Flashing_Guide_.28with_fastboot.29
Installing Fastboot on Windows:
http://www.redmondpie.com/how-to-set-up-android-adb-and-fastboot-on-windows-tutorial/
Sent from my SGH-I747 using xda app-developers app

Soft brick that wont go away - stock firmware uneffective

So my issue is pretty similar, see what you guys think. i been trying everything i can think of.
i updated from xtrestolite 2.1 to 2.2 with out wiping. everything worked fine except when i would make calls, the other people could not hear me. so i updated the bootloader and modem again (i had done it before) and the problem persisted. i flashed back to stock and was getting stuck at the s6 edge screen. the only way to get around this was and get my phone to boot was to flash aou kernel. i was still having a similar issue with calling so I download a modem from a diffrent server and all of a sudden, it was working again on stock firmware... AWESOME!
now that i had all that done and my phone working as it should, i reset my phone for the first time and i got the FRP lock, wont boot phone because custom kernel. GREAT
I then flashed stock of6 again, the tar ball, and the 4 piece version. no dice
i then found of8, tried to flash that still no dice.
id love to flash twrp and load a rom on, but FRP is a alsjdflajs.
the phone will flash successfully, but upon reboot, it will go into recovery, run its course, reboot, and get stuck that the galaxy s6 edge screen.
i use the vol and power click during recovery to see what its doing and everything seems to go fine. it will then say failed to mount /data. im hoping flashing this with the pit file will work, but i cannot download the pit file from my work computer (hahah its blocks on 4shard and mega).
anyone have any other advice? i will update if i figure it out.
Regards team,
-Mad
p.s. none of this is xtrestolite's fault, that rom has been nothing but good to me.. my phone has been picky though. after 5.1.1 i had to flash a custom kernel in order for the digitizer to function properly.... any help is appriciated guys.

SO UPDATE!
nothing good, i tried the pit with of6 and of8, no dice. still stuck.
anyone got a s6 edge w a broken screen? you can claim it lost for all i care.

no one?
i guess if anything past flash stock firmware people dont know? was hoping for alittle more insight.
im sure if i could flash a kernel i could get it to turn on, but FRP has be at bay...

no help for you bro...Samsung just needs to release there software fixing for this comunity...I'm looking a for a dev to answer my question in this section about just flashing zip files in twrp instead of using odin or whatever other methods that can avoid all these problems that are all similar...hopefully in next few months it will be addressed

Hey mate, try this...
http://forum.xda-developers.com/showthread.php?p=61531848
Sent from my SM-G925T using Tapatalk 2

holy... fu34%# /S45it.... IT BOOT?!
after flashing every firmware 100000 times...
THANK YOU!

I initially used odin to flash OI1 update, after a rom I was using caused problems and I got bootloop. It changed bootloader value to b:3 and I'm unable to downgrade now so I used smart switch which didn't recognize device so used emergency recovery and still bootloop. I have factory reset and wipe cache multiple times along with adb side load and individual flashes of bootloader, modem, kernel, flashed custom kernel and twrp to access fix permissions and to mount partitions with advanced wipe etc and still wont boot past logo. Also during one fix attempt phone said can't mount system.. Idk I'm not understanding where the problem is .everything says successful but I'm still in bootloop. Please help. I've spent hours everyday for the past week searching & trying different things that seem might help so open to any suggestions.

Accidentally Soft Bricked Tab S 8.4; tried firmware and PIT flash, no good.

I was given a Galaxy Tab S by a relative who works in a cell phone store. It was a demo device, and it had demo mode enabled. I initially attempted to reboot into recovery and do a wipe from there, but an error came up informing me that "MDM" had blocked this option (I assume MDM to mean manufacturer demo mode). The tablet was still working at this point, so I rebooted and got the exact model number, SM-T700. I googled for a bit and found the recommendation to be to reinstall the firmware. I've done a lot of ODIN flashes before, so I downloaded the correct firmware from the official firmware post here on XDA, rebooted to download mode, and flashed it without issues.
After 30 minutes, the tablet still just showed the Samsung boot screen. I did a hard reboot with volume up + power, and left it. After another 30 minutes, it still didn't show anything. I rebooted to download mode and tried flashing again. Same result. I rebooted to recovery and tried to wipe the device from there. MDM block.
After more searching, I decided to use the PIT file and the firmware file in ODIN. I've had to use PIT files a couple times before, so I was very careful in checking to ensure I had the correct one. I am very confident I did. I flashed that, and still the tablet would not boot.
I then decided to install TWRP and see if I could wipe from there. TWRP gave me some useful information: it returned that it could not mount any of the partitions on the device. 'could not mount /system', 'could not mount /data', etc.
I've done a lot of googling and reading since then, but I can't seem to find anybody else with the result. The closest thing I can find is a similar situation on some ASUS tablets, but the solution would definitely not work here. The only other thing I can find is people recommending to flash the PIT file, which I have no tried a second time and still does not work.
Does anybody have any suggestions? I don't know what else to do.

You didn't need the pit file, so forget about that.
The first thing you should have done is disable the reactivation lock.
Then flash the stock firmware, after that immediately boot into recovery and factory reset.
I would reflash the stock KitKat firmware and immediately boot into recovery after the flash and wipe data/reset
Ensure that during the flashing process there are no errors.

Updating, I got it figured out.
I tried 3 different firmwares, all of which flashed with no errors but did not work. 2 were KitKat, one was lollipop. I tried a fourth firmware (a Korean one from sammobile on lollipop) and it flashed exactly the same as all of the others, but this time it worked. I have no idea what was different with this firmware compared to the other three, but it worked, and I'm happy.
Activation lock cannot be disabled via the demo mode software on Samsung devices (unless there is a method of doing so I am unaware of), so that wasn't an option. I was unable to get the stock recovery to allow a factory reset. Teamwin recovery did allow a factory reset.
Either way, its working now.

Stuck in "blue" screen/odin and can't flash anything successfully

So I attempted to flash the renegade rom...do not think this has anything to do with that in particular, but now I'm stuck on the screen that says the software was not installed correctly. Holding down the power, volume up and home buttons will get me back to odin but when I try to flash anything in Odin (3.10.6), it gets about 20% done and fails. I can't get into the stock recovery again. Before this happened, I was on stock OI1 and had developer options up and bootloader option on , I tried to flash TWRP but kept getting an error, then I had flashed the unikernel (V6 I believe). The phone booted correctly, but the touch screen didn't work. I rebooted several time and tried again, still screen problem. I went into the stock recovery and did a factory reset, booted, screen still didn't work. I went back to odin tried to flash the G920PVPU3BOI1_G920PSPT3BOI1_G920PVPU3BOI1_HOME.tar, but it halted with the fail message at about 20%. Tried again, failed at same time point. Very frustrating because I've successfully rooted and installed multiple roms on my S4 and Evo prior.
At this point I am stuck in the blue screen that says you need to do smart switch to do an emergency recovery, I can get this over to odin, but not recovery. I tried both smart switch and Kies, and both say the phone isn't supported by the software(s). Yes, the drivers were installed prior to. I've tried waiting for the battery to discharge as well, nothing.
I'm at a loss of what to do now. Phone is inoperable and I can't even get into a screen that tells me anything about versions of hardware or software. The barcode is still intact and I can still get into Odin, but nothing more than that. Stock kernel to flash? Why won't odin finish the upgrades? Anything?
The phone is about to go in the trash...Help!

sfinkedbeef said:
So I attempted to flash the renegade rom...do not think this has anything to do with that in particular, but now I'm stuck on the screen that says the software was not installed correctly. Holding down the power, volume up and home buttons will get me back to odin but when I try to flash anything in Odin (3.10.6), it gets about 20% done and fails. I can't get into the stock recovery again. Before this happened, I was on stock OI1 and had developer options up and bootloader option on , I tried to flash TWRP but kept getting an error, then I had flashed the unikernel (V6 I believe). The phone booted correctly, but the touch screen didn't work. I rebooted several time and tried again, still screen problem. I went into the stock recovery and did a factory reset, booted, screen still didn't work. I went back to odin tried to flash the G920PVPU3BOI1_G920PSPT3BOI1_G920PVPU3BOI1_HOME.tar, but it halted with the fail message at about 20%. Tried again, failed at same time point. Very frustrating because I've successfully rooted and installed multiple roms on my S4 and Evo prior.
At this point I am stuck in the blue screen that says you need to do smart switch to do an emergency recovery, I can get this over to odin, but not recovery. I tried both smart switch and Kies, and both say the phone isn't supported by the software(s). Yes, the drivers were installed prior to. I've tried waiting for the battery to discharge as well, nothing.
I'm at a loss of what to do now. Phone is inoperable and I can't even get into a screen that tells me anything about versions of hardware or software. The barcode is still intact and I can still get into Odin, but nothing more than that. Stock kernel to flash? Why won't odin finish the upgrades? Anything?
Odin Screen Reads:
ODIN MODE (red)
PRODUCT NAME: SM-G920P (white)
CURRENT BINARY: Samsung Official (white)
SYSTEM STATUS: Custom (White)
FRP LOCK: OFF (white)
Secure Download: Enabled (blue)
KNOW WARRANRY VOID: 1 (0x0384) (gray)
AP SWREV: B:3 K:2 S:2 (gray)
The phone is about to go in the trash...Help!
Click to expand...
Click to collapse

What I would recommend doing is to try using Kies 3 its pretty much Samsung's take on iTunes. It maybe able to help you. Otherwise, try redownloading the latest tar avabile which is: OJ7 also, try Odin v3.10.7

1619415 said:
What I would recommend doing is to try using Kies 3 its pretty much Samsung's take on iTunes. It maybe able to help you. Otherwise, try redownloading the latest tar avabile which is: OJ7 also, try Odin v3.10.7
Click to expand...
Click to collapse
Thanks for replying.
I tried Kies and Smart Switch, but both did not recognize phone. I did manage to find out that TWRP has a sprint variant and that it seems to be incorrectly labeled in many posts. The sprint variant is 2.8.7.0 NOT 2.8.7.1. I managed to flash it in ODIN and now it boots into Recovery, which is a start. I tried applying the renegade rom, but it wouldn't finish and I'm left with a 'no OS detected, do you want to reboot?' from TWRP.
TWRP website isn't much help (but I love that product). At this point, still cannot tell what firmware is on device and where to go from here. I think I may need a recovery of some sort, but don't have. Tried flashing OJ7 tar as recommeded but it continues to fail when it hits the 'system' part of the download.
Still need advice/help....etc.

Since you are now in recovery, wipe everything!
Cache, System, Data, Internal Data and Dalvik Cache. After that, reboot into Odin and try restoring once more in odin. If that does not work, then wipe everything again and try installing Renegade once more.

1619415 said:
Since you are now in recovery, wipe everything!
Cache, System, Data, Internal Data and Dalvik Cache. After that, reboot into Odin and try restoring once more in odin. If that does not work, then wipe everything again and try installing Renegade once more.
Click to expand...
Click to collapse
Thank for the reply. I did just that and after installing Renegade with kernel version 8, three times, the phone is up and running. Really appreciate the help.

sfinkedbeef said:
Thank for the reply. I did just that and after installing Renegade with kernel version 8, three times, the phone is up and running. Really appreciate the help.
Click to expand...
Click to collapse
, NP glad I could help.

no roms install on my s6 edge after forget to copy rooms file into TWRP
1619415 said:
, NP glad I could help.
Click to expand...
Click to collapse
now my phone in download " blue screen " mode
please someone help me :crying:

billyfatra said:
now my phone in download " blue screen " mode
please someone help me :crying:
Click to expand...
Click to collapse
You should be able to use odin on your PC tp send an image to your phone.
Lookup, for example, how to root your phone in these threads.
Sent from my SM-G920P using Tapatalk