Database Users

Unable to mount /system, Error mounting /system!

So guys, I downloaded the latest CM nightly through the CMupdater app, I rebooted into recovery TWRP 2.6.3.0 at that moment I think, when I tried to flash my update it said "Unable to mount /system" and just stood there, I rebooted into recovery again and tried to mount it from the mounts menu without result.
Next I updated to the latest TWRP but the problem persisted, changed to the latest CWM and that too, is unable to mount /system displaying the message "Error mounting /system!"
I seriously don't want to lose my data as this was a simple update so I didn't make a backup but I don't know what the hell else I'm supposed to do.
Oh and BTW, trying to boot to system leaves me at the Google screen for an indefinite amount of time.
Thanks in advance
Edit:Turns out formatting system doesn't delete my data, I got impatient and did that, problem solved.

Fidelator said:
So guys, I downloaded the latest CM nightly through the CMupdater app, I rebooted into recovery TWRP 2.6.3.0 at that moment I think, when I tried to flash my update it said "Unable to mount /system" and just stood there, I rebooted into recovery again and tried to mount it from the mounts menu without result.
Next I updated to the latest TWRP but the problem persisted, changed to the latest CWM and that too, is unable to mount /system displaying the message "Error mounting /system!"
I seriously don't want to lose my data as this was a simple update so I didn't make a backup but I don't know what the hell else I'm supposed to do.
Oh and BTW, trying to boot to system leaves me at the Google screen for an indefinite amount of time.
Thanks in advance
Turns out formatting system doesn't delete my data, I got impatient and did that, problem solved.
Click to expand...
Click to collapse
Can you add SOLVED to the thread title..
Glad to see everything is ok :good:
Thx Josh

So, i just started getting this same error after updating to TWRP 2.8.2.0, I tried wiping the system and still got the error? I downgraded to TWRP 2.8.1.0 and wiped system again, and that seemed to fix the issue. Not sure if it was my own bug or 2.8.2.0 but just wanted to leave feedback for the next person who may be searching for help.

[Q] TWRP backup fails on data partition "E: Unable to stat /data/data/../cache/ .. "

[Q] TWRP backup fails on data partition "E: Unable to stat /data/data/../cache/ .. "
Whenever I try a full nandroid backup in TWRP it always fails once it gets a few hundred files into the data partition. However, it does complete the backup when the data partition isn't selected.
When I first start the backup a bunch of different red error messages come up for various cache files in the data partition.
"E: Unable to stat '/data/data/[variousapp]/cache/[stuff]/[hashvalue?]' "
I've got a rooted T-Mobile Note 3 with Jedi Elite ROM and TWRP 2.8.1.0, however I'm not completely sure that my phone is legitimately rooted. If I try to open the SuperSU app it says "There is no SuperSU binary installed,...", and applications constantly achieve root access then get denied it moments later. Or sometimes the applications achieve root access with no further issues, it's quite random.
Does anyone have any idea what could be going on?
EDIT: It also should be noted that the files in the error messages can be found when using the TWRP file manager, but when using any file manager application with the OS booted the "/data" folder appears empty.

Anyone have any idea?
Thanks

Well.... from the top of my head I would try to do these things:
1) install one of those "check to see if I am rooted" apps and run it.
2) flash a kernel that has been prerooted, i.e.:that it installs the SU binary to the appropriate location.
3) flash one of those .zip packages in twrp that root your phone.
4) check to see if you can make twrp install root for you ( i think when it doesn't detect root binary it offers to do that).
5) reinstall rom only part as a last resort?
Once you restore proper root access you might need to restore proper SELinux labels to /cache /system /data.
Let me know if you get to this part and need specific instructions.
Best of luck

CekMTL said:
Well.... from the top of my head I would try to do these things:
1) install one of those "check to see if I am rooted" apps and run it.
2) flash a kernel that has been prerooted, i.e.:that it installs the SU binary to the appropriate location.
3) flash one of those .zip packages in twrp that root your phone.
4) check to see if you can make twrp install root for you ( i think when it doesn't detect root binary it offers to do that).
5) reinstall rom only part as a last resort?
Once you restore proper root access you might need to restore proper SELinux labels to /cache /system /data.
Let me know if you get to this part and need specific instructions.
Best of luck
Click to expand...
Click to collapse
I flashed the latest SuperSU.zip and that ended up fixing root access. The Root Checker app verifies it as well as other applications being granted root access.
I tried flashing CF-Auto-Root in TWRP and it fails.
How do I restore the SELinux labels for those directories?

You caught me on my way to bed but here are the instructions:
From terminal or adb shell
su
ll -Z
(check for any "unlabeled" text for /data /cache /system)
restorecon -Rv /cache
restorecon -Rv /data
mount -o remount,rw /system
restorecon -Rv /system
mount -o remount,ro /system
ll -Z (you should not find any "unlabeled" /cache /data /system)
Let me know how it goes

I tried all those commands from the terminal and it still shows all of the same "Unable to stat" error messages when backing up
The "ll -Z" command, is that supposed to be double pipe or double L? I'd never seen a double L command before so I couldn't get it to work if that's what it is.

Sorry to budge in but I have the same problem too on my oneplus one. Everytime I do something in twrp it saids unable to stat /data/data/com.android.chrome/something I wiped /data and it still does that. I tried to install custom rom and when it starts it saids something is wrong with my system udi and com.android.phone keeps on crashing. So I don't know how I am suppose to fix this. If I format /data I will lose all my pictures,music,apps,etc. since it will wipe /data/media? Any help?
Edit: Upon reading the first post again, I also can't perform nandroid backup because it fails at /data. Which was why I wanted to try different rom and wipe /data to see if it would be fixed.

patstar5 said:
Sorry to budge in but I have the same problem too on my oneplus one. Everytime I do something in twrp it saids unable to stat /data/data/com.android.chrome/something I wiped /data and it still does that. I tried to install custom rom and when it starts it saids something is wrong with my system udi and com.android.phone keeps on crashing. So I don't know how I am suppose to fix this. If I format /data I will lose all my pictures,music,apps,etc. since it will wipe /data/media? Any help?
Edit: Upon reading the first post again, I also can't perform nandroid backup because it fails at /data. Which was why I wanted to try different rom and wipe /data to see if it would be fixed.
Click to expand...
Click to collapse
pat, did you have any luck fixing this? i'm having the exact same issue with my oneplus
---------- Post added at 03:13 PM ---------- Previous post was at 03:05 PM ----------
utjock12 said:
pat, did you have any luck fixing this? i'm having the exact same issue with my oneplus
Click to expand...
Click to collapse
alright i said screw it and wiped internal storage and it fixed the issue. i had to push ROM onto the new storage through ADB but it seemed to fix the issue.
For anyone who is wondering you need to do a FULL wipe (ie in recovery wipe EVERYTHING including internal storage), then push or mount devices through recovery and put ROM back onto SD card.

bu_plus said:
Hi friend,
I have tried my best to locate the download link for the new ver. 5.00 ROM but with no success.
Kindly could you please provide me with the link. BTW, I'm using firefox browser.
Best regards,
bu_plus
Click to expand...
Click to collapse
Well you fixed it the easy way, I went to the thread on how to turn oneplus one back to stock.
http://forum.xda-developers.com/oneplus-one/general/guide-return-opo-to-100-stock-t2826541
I unzipped the 44s Stock ROM and manually flashed each file via adb to it, that cleared up all my problems. I did lose some data, at least at had my apps, messages, and pictures backed up.
Sent from my Oneplus One using XDA Free mobile app.

utjock12 said:
pat, did you have any luck fixing this? i'm having the exact same issue with my oneplus
---------- Post added at 03:13 PM ---------- Previous post was at 03:05 PM ----------
alright i said screw it and wiped internal storage and it fixed the issue. i had to push ROM onto the new storage through ADB but it seemed to fix the issue.
For anyone who is wondering you need to do a FULL wipe (ie in recovery wipe EVERYTHING including internal storage), then push or mount devices through recovery and put ROM back onto SD card.
Click to expand...
Click to collapse
I have this same problem with my OPO and I tried a full wipe including internal storage, but the "unable to stat..." problem still persists. Should I try using the "Format Data" option on TWRP instead of just the "Advanced Wipe"? I tried searching online for the difference but I can't really find any information.

monkey29992 said:
I have this same problem with my OPO and I tried a full wipe including internal storage, but the "unable to stat..." problem still persists. Should I try using the "Format Data" option on TWRP instead of just the "Advanced Wipe"? I tried searching online for the difference but I can't really find any information.
Click to expand...
Click to collapse
So I had my issue on my OPO also, still never confirmed what the actual issue was but after some googling I saw this thread and maybe one more with the same error description.
From TWRP I went Wipe->Advanced Wipe->Clicked ALL boxes.
From what I could tell the issue is actually on the "internal storage" partition which is your emulated SD Card.
I'm not actually sure what the "Format Data" option does tbh I never had to go that far.
Word of warning, make sure you have ADB working and you know how to push files to your phone. You can in theory use the "mount" option from TWRP and connect to a PC as an extendable drive but this functionality is super flaky and is known to not work on occasion.

you don't have to!!!!!!!!!!!
actually i formated it and i was looking for a way to transfer my zip file to internal storage ........... but when i clicked on backup/restore it started to install and booted normally !!!!!!!!!!!!! (by temp boot file)

Sad I am also facing this problem too. At last I have to format everything to get my phone working again, wiping /data does not work, must wipe /data including media.

Internal Storage failure?
This happens to me all the time all of a sudden. I did not change anything at all, except for flashing a new CM version.
I also get a strange stat error, something with google.photo cache.
Yesterday, I have then flashed the new 2.8.6(7) and that gave my phone the rest. It might be because I flashed through TWRP itself into the recovery partition, but now additional to the backup error above when I want to erase dalvik cache, the recovery just hangs. I also can't restore a backup atm.
Now I have reflashed the real 2.8.6.0 recovery and it still hangs when I want to wipe dalvik... wtf is going on here?
And oh yea, my phone does not boot anymore either, it just loops at the flash screen...
UPDATE:
After I found some info on this thread about similar issues, I factory reset my phone with stock recovery (TWRP was not reliable anymore, even the 2.8.6.0 version that was running perfectly before) and then reflashed the latest CM on a wiped internal storage. Now I am up and running again with minimal loss of data due to my TB backups that are scheduled and save to the SD.
But this leaves a very weird feeling back, basically my phone was rendered useless out of nowhere (I was running the previous CM for 2 weeks already), making TWRP backups impossible and forcing me to wipe the internal storage with all media on it without giving me the chance to back it up (MTP in TWPR was also very flaky and died several times half in copy operations). Something is going very wrong with this phone, never ever had that on any of my 5 previous htc devices and the fact that the OnePlusOne users are among the main ones that reported similar issues, I have a feeling it is linked to cheap storage quality. Motorola is a Chinese company now after all... :-/

Hello,
I had the same issue with my Galaxy s4 GT-I9500, it said "E: Unable to stat /data/...", wiping didn't fix, but after I run "format data", it fixed the issue for me.

I have been going through the same issue. I can fix it for 'a while' (by wiping and formatting data) before it comes back again. Anyone knows how to get rid of this once and for all?

Encrypted 9505 won't boot

Good morning XDA fellows,
I am encountering a slight issue: I have encrypted my i9505 two days ago and I went blindly into installing the latest 5.0.2 CM 12 build. I have done a wipe and went into installing from zip which booted the CM setup but stopped at the Encryption Unsuccessful message. If I reboot, it starts the CM setup and stops at the same message.
If I try to mount the sdcard ( the phone's main memory ) it gives me an error and therefore I've put all the files on an external sd ( sdcard1 ).
What is the safest thing I should do in order to avoid a hard brick? Would you recommend me to flash a stock firmware with odin via download mode? Would the encrypted volume mess with odin ?
Yours sincerely,

Hello,
if you point to use CM don't encrypt your device, at least for now. You don't need to flash with Odin now, just go in recovery and format internal memory (/data and /data/media), then flash CM zip

AntaresOne said:
Hello,
if you point to use CM don't encrypt your device, at least for now. You don't need to flash with Odin now, just go in recovery and format internal memory (/data and /data/media), then flash CM zip
Click to expand...
Click to collapse
Hi Antares, I receive an error when I try to format anything that has to do with the internal memory: E: Error mounting /data E: Error formatting /data . The same thing applies when I want to install any zip from the internal memoryE: Can't mount /sdcard. I suspect it has something to do with the encryption. I am not interested in recovering anything because I have already backed up before copying the setup files on both the internal and the external sd ( before it crashed ).
Thank you in advance,
EDIT: I have tried to flash it with jodin3 on a Macbook Pro and it didn't end up successfully. I have flashed using Odin 3.10 and the system booted up so that I could remove the encryption. Once done, I have flashed AntaresOne's CM12 build and everything works flawlessly. Thank you for your support!

chypp said:
Hi Antares, I receive an error when I try to format anything that has to do with the internal memory: E: Error mounting /data E: Error formatting /data . The same thing applies when I want to install any zip from the internal memoryE: Can't mount /sdcard. I suspect it has something to do with the encryption. I am not interested in recovering anything because I have already backed up before copying the setup files on both the internal and the external sd ( before it crashed ).
Thank you in advance,
EDIT: I have tried to flash it with jodin3 on a Macbook Pro and it didn't end up successfully. I have flashed using Odin 3.10 and the system booted up so that I could remove the encryption. Once done, I have flashed AntaresOne's CM12 build and everything works flawlessly. Thank you for your support!
Click to expand...
Click to collapse
Glad to know you solved.
In case of issues with my ROM write in its thread (Q&A one)
Inviato dal mio GT-I9505

Gt i9506 10 gb used by system after flashing.

hello there!
some months ago i tried a custom firmware on my 9506 (i think that was the first version of arya mod) but i didnt kinda like it so i downloaded again the stock fw and flashed it back.
i did my typicall "download the basic apps" routine and on the 4th app an "insufficient storage available" message appeared on my screen and i was like "lol whats wrong?" i checked on and i found that 10.6Gb was used by system.
Well i thought that i downloaded maybe a bugged stock rom and i didnt have the free time at the time to check whats wrong so i decided to live with it till i find some spare time to check it again.
Yesterday i downloaded and flashed the lineage os fw and i was sure that this would fix the problem...but...well it didnt..still 10.6 used by system.
i tried wipe EVERYTHING (dalvik/cache/system/internal) and reflashed again but still nothing,i flashed again the stock rom,still nothing, i searched online but i didnt find a solution, i downloaded diskusage app to see where are those 10gbs but i couldnt figure out where they where.
So if anyone knows anything or had the same or similar problem it would be great if he/she write here and give a solution or some tips.
Thanks in advance

Try format data from recovery.

Pwnycorn said:
Try format data from recovery.
Click to expand...
Click to collapse
Thanks for your reply!
You mean the wipe option or am i missing something?
I did wipe everything via twpr recovery from the "advanced wipe option" and checked everything except my sdcard and still nothing.
is there any other way to completly format it ? if so,then how i can do it?

bakos360 said:
Thanks for your reply!
You mean the wipe option or am i missing something?
I did wipe everything via twpr recovery from the "advanced wipe option"
Click to expand...
Click to collapse
There's a format data option there too.

Pwnycorn said:
There's a format data option there too.
Click to expand...
Click to collapse
lol i didnt see it and it was in front of my eyes!
i tried that too today but here is what is happening
Updating partition details...
...done
Full SELinux support is present.
Running boot script...
Done.
MTP enabled
E:unable to wipe '/data' -- unknown file system ' auto enable to format to remove encryption.
Mount media patd for recreate TWRP settings. /data/media/o
TWRP settings saved
Updating partition details...
...done..
for some reason it seems that its enable to format '/data'
any other option ? =/

bakos360 said:
lol i didnt see it and it was in front of my eyes!
i tried that too today but here is what is happening
Updating partition details...
...done
Full SELinux support is present.
Running boot script...
Done.
MTP enabled
E:unable to wipe '/data' -- unknown file system ' auto enable to format to remove encryption.
Mount media patd for recreate TWRP settings. /data/media/o
TWRP settings saved
Updating partition details...
...done..
for some reason it seems that its enable to format '/data'
any other option ? =/
Click to expand...
Click to collapse
Try flashing the stock ROM together with a PIT file

i fixed it guys
i flashed again cwm recovery and i formated EVERYTHING from there and then reflashed again the rom and gapps and that fixed the problem.
Thanks for your help !

For the record, CWM's incremental backup feature was what I believe was stealing your space. If you still have CWM on that device, make sure to set the default nandroid backup format to ".tar" instead of ".dup", clear out your nandroid backups, clear all the allocated space, and then upgrade to the latest version of TWRP.
CWM hasn't been updated in a few years now and has difficulty installing modern ROMs.

you are right i think.
if i recall corectly when i flashed that rom back then before the problem appeared, i used cwm recovery so yeah maybe thats the main reason that this happened.
i allready set the default backup to .tar and cleared out all the nandroid backups and i allready use TWRP now.
thanks for the tip mate!

ATT G2 D800 Unable To Mount /data, /system, or any other partitions

I was trying to fix an annoying error in which my phone would power down and go into a boot loop out of nowhere by installing a custom rom. I've installed new roms on plenty of phones, so it usually isn't any problem.
However, upon using the app AutoRec that was recommended by many to install a custom recovery (and yes I did make sure I used the Lollipop version for my Lollipop phone), my phone was wiped and now has no OS. I can get into TWRP, so I can use ADB and push files, but there's no file system to install to if I decide to flash. Programs like LGUP and LG Flash Tools can't communicate with the unmounted storage.
Repairing, wiping, and reformatting the file system from within TWRP only produces the "Unable to mount '/data'" error. I can't mount the partitions manually. Commands to format the system don't work either. I've been stuck on this for days. Please help.