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Unable to mount /data

I've managed to get that awful Rom (Destroyer) Manager off of my TF101G and have got Rogue on via PERI and now I'm trying to flash the stock ASUS ICS Rom but can't delete the Dalvik Cache because I'm unable to mount /data
Code:
- - Wiping all user data - -
Formatting /data...
Formatting /cache...
Formatting /sd-ext...
Formatting /sdcard/.android_secure
Cache wipe complete.
Formatting /cache...
Cache wipe complete.
Wiping dalvik-cache...
Error mounting /data!
I'm assuming that /data is stuck on read only?
Manually fixing permissions and then mounting /data also shows the same error.
HELP :crying:

I have the same problem. I know what lead me to it.
Its an Asus SL101
I have cyanogenmod correctly installed. In order to install a megatron rom I downloaded their app called megatron apps. Trying to download a rom from them I got validation error at end of download and I make the stupidity of change the download dir from /mnt/sdcard to /sdcard and then when I restart again it doesn´t load and CWM recovery give me the same errors (unable to mount /data or unable to mount /sdcard when cleaning cache or trying to restore a backup ).
The only thing I have been able to do its to install Rogue XM Recovery 1.5.0 instead of CWM 6.x ) but the problem to apply an update or restore a backup persists.
Any idea ?

Aaargh.
After a year and a half of heavy CWM and TWRP usage, this has suddenly happened to me too, possibly after flashing the updated TWRP blob from Goo Manager (although that's conjecture at best). My ROM (RaymanFX' CM10 v6) is fine in everyday use - no problems whatsoever, but now I want to update, and my recovery won't let me.
In the hope that something simply went wrong during recovery blob flash, I successfully deleted TWRP and flashed a different recovery (latest CWM) from ROM Manager, but the new recovery can't mount anything either - neither sd card, data, or cache. The error messages are more or less identical to TWRP's errors. My system MAY be readable, but I can't backup or restore or flash anything anyway, so I don't dare format it.
I don't have a Windows PC, so I haven't tried Easy Flasher. I could try it on my work computer if there's no way around it and if neither OSX or Ubuntu can help.
Any suggestions?

Error trying to wipe Internal Storage (TWRP)

Hi, I tried to do a full wipe from TWRP, but I was unable to wipe Interal Storage, next message appeared:
E:mount -o bind '/data/media/0' '/sdcard' process ended with ERROR=255
Anyways, the message of succesfull wipe appeared (and internal storage was in fact wiped). I don't know if I should worry (everything works fine after installing CM.12.1 nightly 08/06). The previous firmware installed was OxygenOs (I had a remote session thinking they would accept a RMA but they instead installed Oxygen with the latest drivers ). Every time I try to wipe that partition again I get the same message (but it gets wiped).
Thanks for your help and sorry for my english!

trionic said:
Hi, I tried to do a full wipe from TWRP, but I was unable to wipe Interal Storage, next message appeared:
E:mount -o bind '/data/media/0' '/sdcard' process ended with ERROR=255
Anyways, the message of succesfull wipe appeared (and internal storage was in fact wiped). I don't know if I should worry (everything works fine after installing CM.12.1 nightly 08/06). The previous firmware installed was OxygenOs (I had a remote session thinking they would accept a RMA but they instead installed Oxygen with the latest drivers ). Every time I try to wipe that partition again I get the same message (but it gets wiped).
Thanks for your help and sorry for my english!
Click to expand...
Click to collapse
hey and welcome ,
you should always install the newest Twrp. Just download it via playstore
an other method. Download multirom and install twrp from there.
For the next time. Wipe partitions. Try to repair theme and flash it back to ext4.
Now everything should be clean.
If your system runs without any problemes or issues its just a cosmetic issue not more.
regards

Are you using latest 2.8.6.0/2.8.6.1?

davebugyi said:
Are you using latest 2.8.6.0/2.8.6.1?
Click to expand...
Click to collapse
real_pac said:
hey and welcome ,
you should always install the newest Twrp. Just download it via playstore
an other method. Download multirom and install twrp from there.
For the next time. Wipe partitions. Try to repair theme and flash it back to ext4.
Now everything should be clean.
If your system runs without any problemes or issues its just a cosmetic issue not more.
regards
Click to expand...
Click to collapse
I am using 2.8.6.1 (latest version). Unfortunately twrp doesn't allow me to repair / format that partition.
Thanks you both for your response

trionic said:
I am using 2.8.6.1 (last version). Unfortunately twrp doesn't allow me to repair / format that partition.
Thanks you both for your response
Click to expand...
Click to collapse
You're welcome but please don't a new thread write in the specific thread..
please reinstall twrp via playstore flashable zip or just flash the recovery img via adb or any oneplus one toolkit regards

real_pac said:
You're welcome but please don't a new thread write in the specific thread..
please reinstall twrp via playstore flashable zip or just flash the recovery img via adb or any oneplus one toolkit regards
Click to expand...
Click to collapse
I installed again with TWRP Manager and everything works perfectly now (no error message). Thanks again

trionic said:
Hi, I tried to do a full wipe from TWRP, but I was unable to wipe Interal Storage, next message appeared:
E:mount -o bind '/data/media/0' '/sdcard' process ended with ERROR=255
[...]
Click to expand...
Click to collapse
I faced this error once on twrp 2.8.6.1 a week ago. I wanted to restore my nandroid and the error repeatedly happened while restoring data-partition. I then booted the system and deleted some files from internal storage (which was about half full at the time the error occurred). Afterwards I rebooted to twrp and could successfully restore my complete nandroid. It's a bit shocking if you face this error when restoring a nandroid, because the restore process wipes the data partition first and then begins the restore.

real_pac said:
hey and welcome ,
you should always install the newest Twrp. Just download it via playstore
an other method. Download multirom and install twrp from there.
For the next time. Wipe partitions. Try to repair theme and flash it back to ext4.
Now everything should be clean.
If your system runs without any problemes or issues its just a cosmetic issue not more.
regards
Click to expand...
Click to collapse
That tip worked for me (i9192), I just install the last TWRP (I think this is not needed) and wipe /Data with ext4, wipe again to F2FS and restore, thank you.

unable to mount /system /data /cache internal storage

can any one help me
what i did was, formatting the system ,data partion using wipe option in recovery (twrp), by mistake the battery got removed during the process since then the problem occured..
my yuphoria device stuck on the boot logo
is not able to mount /system /data /cache and internal storage
it is booting in fastboot mode as well as in recovery but i m not able to flash any rom, in recovery its giving the error as unable to mount /system /data /cache, showing 0mb space in internal storage and system
i also tried to flash using fastboot but giving error at the system partition sowing system write failure.. can some one identify provide me with the solution .. thanks

Same problem
harshgoswami said:
can any one help me
what i did was, formatting the system ,data partion using wipe option in recovery (twrp), by mistake the battery got removed during the process since then the problem occured..
my yuphoria device stuck on the boot logo
is not able to mount /system /data /cache and internal storage
it is booting in fastboot mode as well as in recovery but i m not able to flash any rom, in recovery its giving the error as unable to mount /system /data /cache, showing 0mb space in internal storage and system
i also tried to flash using fastboot but giving error at the system partition sowing system write failure.. can some one identify provide me with the solution .. thanks
Click to expand...
Click to collapse
I'm also facing same problem.......shows 0MB in Internal storage(twrp).......and stuck with YU logo doesnt go further....

I am also facing the exact same problem. Did you find any solution ??

BOTDeveloper said:
I am also facing the exact same problem. Did you find any solution ??
Click to expand...
Click to collapse
same here. any solution?? please help guys !

Facing same problem. Did anyone solve the issue?

cm-13.0-20161219-NIGHTLY-lettuce.zip apply this update from sd card it works

Guys ,..... anybody plz any solutions..... developers!!

facing exact same problem
guys facing exact same problem. searched everywhere but couldn't find any solution. im very much frustrated right now. tried everything . nothing works

facing same problem
any update on howm top solvew thisa guys?

Solution for 0 MB storage in TWRP
Hi Brothers!
It's my first time posting here , so if i make a mistake i am sorry in advance for that.
Solution for 0 MB storage in TWRP is very easy.
You need to boot your phone into TWRP.
In 2nd step you need to go to WIPE option .
Select Data and click on FS Options e.g. trying to change its partition format, most phones use Ext4.
Do same with the Data.
And TADA!!!!
Your problem is solved
I hope it helps you guys getting answer after a long time because i saw it late. Sorry for that.

same problem
BOTDeveloper said:
I am also facing the exact same problem. Did you find any solution ??
Click to expand...
Click to collapse

Try to wipe everything
Format data using twrp
It should be solved.

Hi my YU Yuphoria 5010 started acting up since last week ,when i noticed that the phone was restarting randomly and the settings was missing and even if i clicked on the settings logo in the notification panel, nothing would happen .So i decided to flash a Cusstom ROM instead and boot into recovery.While trying to wipe cache,dalvik and data I got an error message "uable to mount data,cache ,system(invalid argument) and internal memory* was showing up as 0.So i thought my phone was bricked and tried reviving it with the sd card method.But everything else except for system flashed , and got an error FAILED (remote: flash write failure ) just for system .Anyway now I could boot into recovery using fastboot boot command and the internal memory started showing up correcty. The fastboot command is the only way i could get into recovery, if i try power+volume down it would just come up with the empty battery logo. After this i installed qualcomm drivers and manually changed the driver to Qualcomm HS-USB QD Loader 9008 and tried flashing through QFil with a flashable stock ROM and ended up with the error message:"Download Fail:System.Exception: Unable to download Flash Programmer using Sahara Protocol** at QC.QMSLPhone.Phone.QPHONEMS_SaharaArmPrgDownload(String sFileName)** at QC.SwDownloadDLL.SwDownload.QPHONEMSSaharaDownloadArmPrg(UInt64& version, String armPrgPath)
Download Fail:Sahara FailSahara Fail".
But after going through some of the posts I found that my phone might not be bricked in the first place.My device just shows up as 'Android' under Other devices in Device Manager.
The following are the details from device manager.
Device type: Other devices
Manufacturer: Unknown
Location Port_#002.Hub_#003
Problem code : 0000001C
Physical Device Object name: \Device\USBPDO-6
Hardware IDS: USB\VID_2A96&PID_300A&REV_0100
USB\VID_2A96&PID_300A
{259abffc-50a7-47ce-af08-68c9a7d73366}[13]: 6.0
{6a3433f4-5626-40e8-a9b9-dbd9ecd2884b}[4]: <true>
{6a3433f4-5626-40e8-a9b9-dbd9ecd2884b}[6]: <true>
I also tried to restore through TWRP recovery using the back up my brother created on his YU 5010A to no success.Changing the file system type and back to ext4 also didnt help. I use a Windows 10 64bit Laptop.
What could I possibly do to revive my phone?Kindly help.
Sent from my HUAWEI Y560-L01 using XDA Free mobile app

Not working for me
rahman.khan001 said:
Hi Brothers!
It's my first time posting here , so if i make a mistake i am sorry in advance for that.
Solution for 0 MB storage in TWRP is very easy.
You need to boot your phone into TWRP.
In 2nd step you need to go to WIPE option .
Select Data and click on FS Options e.g. trying to change its partition format, most phones use Ext4.
Do same with the Data.
And TADA!!!!
Your problem is solved
I hope it helps you guys getting answer after a long time because i saw it late. Sorry for that.
Click to expand...
Click to collapse
Not getting any help as the same failed to mount issue is continuing.

puriadeb said:
Not getting any help as the same failed to mount issue is continuing.
Click to expand...
Click to collapse
Wipe everything include system,internal storage and data.
Reboot TWRP to recovery again
Now check your internal storage will be mounted
After it connect phone with pc in mtp mode ( TWRP)
Copy any custom ROM
Then install it through recovery
Enjoy

nischait said:
Wipe everything include system,internal storage and data.
Reboot TWRP to recovery again
Now check your internal storage will be mounted
After it connect phone with pc in mtp mode ( TWRP)
Copy any custom ROM
Then install it through recovery
Enjoy
Click to expand...
Click to collapse
Hi,
I have tried this several times without any help.

Cache format issue .Solved using advanced wipe in TWRP
harshgoswami said:
can any one help me
what i did was, formatting the system ,data partion using wipe option in recovery (twrp), by mistake the battery got removed during the process since then the problem occured..
my yuphoria device stuck on the boot logo
is not able to mount /system /data /cache and internal storage
it is booting in fastboot mode as well as in recovery but i m not able to flash any rom, in recovery its giving the error as unable to mount /system /data /cache, showing 0mb space in internal storage and system
i also tried to flash using fastboot but giving error at the system partition sowing system write failure.. can some one identify provide me with the solution .. thanks
Click to expand...
Click to collapse
open TWRP recovery.Go to wipe section and select advanced wipe option here .Now select data and cache from check boxes.then click on change partition format.Select ext4fs .Wipe it then wait for sometime because sometimes it takes approximately 15-20 mins so be patient .It will successfully wipe and then you can see that everything is up to the mark !

puriadeb said:
Hi,
I have tried this several times without any help.
Click to expand...
Click to collapse
flash stock cyanogen rom again. Then install TWRP. Cross check at your end. We actually don't know which process you are following!
I have a YU5510A running Quarkos and YU5010A running AOSP Extended. I also flash a lot of custom Roms but never get any issue.

did you find any solution for this i can only access cyanogen recovery and fastboot mode .
harshgoswami said:
can any one help me
what i did was, formatting the system ,data partion using wipe option in recovery (twrp), by mistake the battery got removed during the process since then the problem occured..
my yuphoria device stuck on the boot logo
is not able to mount /system /data /cache and internal storage
it is booting in fastboot mode as well as in recovery but i m not able to flash any rom, in recovery its giving the error as unable to mount /system /data /cache, showing 0mb space in internal storage and system
i also tried to flash using fastboot but giving error at the system partition sowing system write failure.. can some one identify provide me with the solution .. thanks
Click to expand...
Click to collapse

duskyrahul said:
did you find any solution for this i can only access cyanogen recovery and fastboot mode .
Click to expand...
Click to collapse
Flash stock ROM using fastboot
For yu5010a you got fastboot package
Open flash all.bat
Just remove device code
02x1ebf or anything I don't remember what it was.
Remove it from all lines
Save flash all.bat
Run it
---------- Post added at 01:29 PM ---------- Previous post was at 01:26 PM ----------
duskyrahul said:
did you find any solution for this i can only access cyanogen recovery and fastboot mode .
Click to expand...
Click to collapse
Flash stock ROM using fastboot
For yu5010a you got fastboot package
Open flash all.bat
Just remove device code
02x1ebf or anything I don't remember what it was.
Remove it from all lines
Save flash all.bat
Run it
For 5510a
Download ygdp 5.0
Select developer option
Select CBP file
Wait for tool extract it
Now minimize tool
Go to folder
Ygdp 5.0
You find here downfiles folder
Copy it and paste in c:\
Run flash all.bat
Done
---------- Post added at 01:35 PM ---------- Previous post was at 01:29 PM ----------
If any one got error in mounting using twrp
Just follow steps
Goto wipe -> advance wipe-> format data->
Type yes
Wait for process completion
Now reboot twrp to recovery
You see everything is mounted successfully.
Note :- with this step you format everything from your phone so don't reboot to system
Now connect phone with pc and copy any downloaded custom ROM in external SD
Flash it
Enjoy

Can't flash anything through recovery. (failed to mount "/cpefs" (Invalid Response)

Can't flash anything through recovery. (failed to mount "/cpefs" (Invalid Response)
I recently got this phone and I've been trying to install a custom rom, however, I can't seem to do anything while using TWRP. For some reason the file explorer shows no files and no /storage folder. It also says that the /system partition weights 0MB. I've already tried formatting the /data partition from EXT4 to extFAT, but it won't let me because it cannot mount the "/cpefs" partition, which I've been unable to find any information about.
I can flash the stock firmware trough ODIN, and I can flash the recovery. The internal storage works fine, but nothing shows up when I open TWRP.
I've tried formatting the data partition, repairing it, changing the partition format, wiping, installing a custom rom, installing superSU. But it won't allow me to do any of those things. Either "/data" can't be mounted, or "/cpefs" can't be mounted while formatting /data.

Cepillado said:
I recently got this phone and I've been trying to install a custom rom, however, I can't seem to do anything while using TWRP. For some reason the file explorer shows no files and no /storage folder. It also says that the /system partition weights 0MB. I've already tried formatting the /data partition from EXT4 to extFAT, but it won't let me because it cannot mount the "/cpefs" partition, which I've been unable to find any information about.
I can flash the stock firmware trough ODIN, and I can flash the recovery. The internal storage works fine, but nothing shows up when I open TWRP.
I've tried formatting the data partition, repairing it, changing the partition format, wiping, installing a custom rom, installing superSU. But it won't allow me to do any of those things. Either "/data" can't be mounted, or "/cpefs" can't be mounted while formatting /data.
Click to expand...
Click to collapse
Which phone you're using?
J7 Pro?
Secondly make sure to enable OEM unlock options from the stock ROM's Developer option!
Thirdly check the recovery patches etc of the desired recovery's webiste (you're using) and flash it through the recovery if you're facing the problem!
It'll work, mostly some users said they fixed this by the above mentioned step!
If no luck, maybe someone will sort it out for ya, soon! :laugh:
Good Luck! :good:

sosukeaizen said:
Which phone you're using?
J7 Pro?
Secondly make sure to enable OEM unlock options from the stock ROM's Developer option!
Thirdly check the recovery patches etc of the desired recovery's webiste (you're using) and flash it through the recovery if you're facing the problem!
It'll work, mostly some users said they fixed this by the above mentioned step!
If no luck, maybe someone will sort it out for ya, soon! :laugh:
Good Luck! :good:
Click to expand...
Click to collapse
Thanks for your reply. The model of the phone is SM-J710MN. The OEM unlock option is enabled, otherwise I wouldn't be able to flash the recovery. I am trying to use TWRP. Where would I find a recovery patch for this model?. Everything works fine in the recovery, but it won't let me wipe/format/repair or change ANY partition. It can't mount anything, and the error that I see the most often is that it cannot mount the /cpefs partition.

Cepillado said:
Thanks for your reply. The model of the phone is SM-J710MN. The OEM unlock option is enabled, otherwise I wouldn't be able to flash the recovery. I am trying to use TWRP. Where would I find a recovery patch for this model?. Everything works fine in the recovery, but it won't let me wipe/format/repair or change ANY partition. It can't mount anything, and the error that I see the most often is that it cannot mount the /cpefs partition.
Click to expand...
Click to collapse
try flashing a lower version of the same frimware you've already installed e.g if the latest is nougat 7.1.1 with the recent security update, try flashing with another nougat version that is lower to the recent one's security patch #

MiNote3 Unable to mount data

Basically I screw up last night, trying to flash a file that was not supposed to work on minote 3, android 7.
After some tries(flashing pixel experience and appearing the encrypted phone), I was able to flash miuiPro 8.9.20.
The phone works perfectly, but I have some errors, that I need some help:
-when I go to twrp, there is 0 zips in folder, I' can't find them anywhere
-basically when I try to flash magisk, it appears Installation failed
-I can't repair data, error: failed to mount /data
Thanks for all the help I receive.

Try mounting /data manually or format data.

Hi, try to flash fastboot rom with MiFlash and then flash the rom you want.

omercicek43 said:
Try mounting /data manually or format data.
Click to expand...
Click to collapse
thanks for your response.
I already formated my data
what do u mean by: format manually?

Wistake said:
thanks for your response.
I already formated my data
what do u mean by: format manually?
Click to expand...
Click to collapse
I didn't say something like that. I said try mounting data manually.