Develop Bugs

S4 bootloop, E:failed to mount /system (Invalid argument)

Hello everyone,
i'm new to android devices and english is not my native language, so i'll try to explain my problem as well as i can.
the GT-I9195 won't boot, if i turn it on it freezes in the booting screen (the white logo with the model number).
so my first try was to recover it to factory settings by pressing volume up+home button+power. unfortunately this results in a red text that tells me: "E: failed to mount /system (invalid argument)", so the phone can't access the files that are needed for the recovery.
now i thought maybe kies could help me with this emergency firmware recovery but kies doesn't even recognize the phone, it stucks at trying to connect to the device.
ok at this point i knew this is getting complicated, i think the next step is trying to flash the right firmware by hand and restore the files needed for the recovery, buuut i don't know which firmware is the right one since i can't check the correct PDA/CSC/MODEM number.
now my question is how can i figure out which stock firmware is the right one, or maybe i can use some sort of costum firmware?
do i need to download any other files to make the phone work again? i ask that because when i open the odin tool there are buttons with bootloader/pda file/etc.
i hope that just somehow the files got corrupted and the intern flash memory ist still working and not damaged...
thanks in advance

cant enter recovery

Hi .
Got stuck on asus logo after update, so i entered recovery mode. I tried to delete cache but i got stuck somewhere on the way. Now when i enter recovery i get some text and the last line says "cant mount /cache/recovery/last locale"
Dunno what to do. I have not rooted the phone.
Help please

imageshack.com/a/img537/706/UlRgkH.jpg
I managed to take a foto of it =)

TWRP failing to mount /data + bootloop

Hi all,
After spending all my morning looking at various solutions I've resulted in opening a new thread.
I was trying to install a stock rom this morning however was stuck in a bootloop on the LG logo.
Trying to go back into recovery resulted in a black screen after the TWRP logo.
I was attempting to re-install TWRP to see if that would fix the problem however I only managed to get into Download Mode (is this the same screen as the Bootloader?) and adb/fastboot couldn't find the device.
Magically, TWRP boots up now however in the log it states the following:
Code:
E: Could not mount /data and unable to find crypto footer.
E: Unable to mount /data
E: Unable to recreate /data/media folder
E: Unable to mount storage
E: Unable to mount /data/media during GUI startup
E: Unable to mount /data/media/TWRP/.twrps when trying to read settings file
If anyone can point me in the right direction in how to resolve this I would be grateful.
Regards,
Ash

AshleyNG2 said:
Hi all,
After spending all my morning looking at various solutions I've resulted in opening a new thread.
I was trying to install a stock rom this morning however was stuck in a bootloop on the LG logo.
Trying to go back into recovery resulted in a black screen after the TWRP logo.
I was attempting to re-install TWRP to see if that would fix the problem however I only managed to get into Download Mode (is this the same screen as the Bootloader?) and adb/fastboot couldn't find the device.
Magically, TWRP boots up now however in the log it states the following:
Code:
E: Could not mount /data and unable to find crypto footer.
E: Unable to mount /data
E: Unable to recreate /data/media folder
E: Unable to mount storage
E: Unable to mount /data/media during GUI startup
E: Unable to mount /data/media/TWRP/.twrps when trying to read settings file
If anyone can point me in the right direction in how to resolve this I would be grateful.
Regards,
Ash
Click to expand...
Click to collapse
Looks like you trying to install stock Rom, Given the account you used a flashable zip. It didnt install all the way. and now your stuck with a messed up unstable device......
If you can get into TWRP, wipe everything at least 2 times.. Then install a Flashable ROM/gapps ect..
If you cant get into TWRP and only into Download mode.. Then you will have to flash stock kdz file...............
you can find all types of guides on that around here............

Eliminater74 said:
Looks like you trying to install stock Rom, Given the account you used a flashable zip. It didnt install all the way. and now your stuck with a messed up unstable device......
Click to expand...
Click to collapse
Thanks for your response, once I got into TWRP I couldn't wipe anything as it couldn't mount any partition nor could I flash anything from the external sd.
When I plugged it in there was no internal memory so I decided to use the TOT restore method to go back to stock which was successful and now I've got my custom stock rom back on.

[SM-N7502] bootloop !!

hello all
i have the beast note 3 (sm-n7502)
but .. my beast need to rest :crying:
actually i think i have a boot loop , it just shows " samsung logo " and wont boot
now you gonna ask me " do u install a new rom ? " actually i did nothing with my phone , the phone battery end , i plug the charger , come back and find my phone wont boot .
i can do a " factory reset " but i want my data ( apps , sms , game progress ,videos and photos)
i tried to install custom recoverys ( cwm , philz and twrp )
but nothing work it shows
E:cant mount cache/ recovery / log
E:cant open cache
E:cant mount /sdcard
i tried to recovery my data using " wondershare dr.fone " but my phone is not supported .
any idea to recover my data without doing a factory reset
i want to hear from you :fingers-crossed:

Unable to mount system TWRP issue

Hi everybody ,
I have a very big problem with my lg g3 , everything was fine , until one day I had an issue with my simcard that doesn't work.
So I decided to change my rom , (I went from Zoe Rom to Fulmics 6.6rom ) in order to maybe solve the problem
anyway I don't know what happened but everytime I want to wipe something TWRP writes in red :
"E: unable to mount /system"
"E: unable to mount /data"
"E: unable to mount /cache
"E: unable to mount storage"
So I do have access to my sd card in TWRP , I tried to install several roms but they all failed because " unable to mount ...."
Now I have no rom installed , I can only access to TWRP via the vol down button ,
I tried to access download mode but I can't : I have a little logo with download mode and then nothing , just a black screen.
I can't access download mode , when I plug my G3 it is reconized by windows , but it shows nothing for the internal storage , I can only access to my sd card. My phone is not reconized by lg flash tool nor by Lg pcsuite.
I am desperate , I don't know what to do , You guys are my last chance . I hope we will find a solution .
Btw sorry if I mad english mistakes.
Thank you all

i have the same issue

I've been there. but when they use the stock rom. My solution is to format the factory. nandroid last backup. I then flashing a custom rom.
Sent from my LG G3 using XDA Labs