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Stupidly encrypted my Nexus S, how would I go about removing this encryption?

From what I read you need to unroot the phone but I can not find a guide about this. I do not need to remove the encryption right now but I would like to remove it soon so I can flash a new rom.

maybe this? http://forum.xda-developers.com/showpost.php?p=21755219&postcount=11

sean1984 said:
maybe this? http://forum.xda-developers.com/showpost.php?p=21755219&postcount=11
Click to expand...
Click to collapse
That guide is for the Galaxy Nexus. I will look it over later and see if I could possibly use it. At first glance it looks like I can't.

Probably just best to backup all your data (Titanium backup for apps, copy all SDCard contents to your PC) then go intor recovery:
factory/data reset
format /system
format /boot
Flash FULL OTA for your phone

I also stupidly encrypted my phone without realizing that I cannot undo it later on. Now most of my apps force closes very often especially the games that I have installed before encryption.
The phone also heats up very quickly at times. Not sure if it's related to this or not.
I'm just hoping that the next OTA update to either 4.04 or 4.05 would solve these issues. If not, then I'll have to do the whole factory reset thing

Harbb said:
Probably just best to backup all your data (Titanium backup for apps, copy all SDCard contents to your PC) then go intor recovery:
factory/data reset
format /system
format /boot
Flash FULL OTA for your phone
Click to expand...
Click to collapse
Just wanted to say that this worked for me. The one thing I would like to add though is that you will still need to mount the usb storage and format before you are allowed to copy files to the sd card.

Wiping encrypted /sdcard
Luckily, Clockwork can still make the USB interface available. If you're on Windows, you can format the "Removable Disk" device that appears when you use the USB mount option in "mounts and storage" in Clockwork. It only needs a quick format.
Once you're done with that, go back to Clockwork and wipe it. You should be good.

Wipe data/cache not working

I am trying to update my xoom to a new rom, ICS, and yet when I go into recovery to wipe data/cache, nothing gets touched by this command. I want to wipe the xoom clean and start over yet I can never get this command to work. I want to format the internal storage and start fresh yet every time I try this command all of the folders and apps and data are still left on the internal storage.
Any suggestions on how to get this fixed? I wanted to just mount the storage while in recovery and then perform a format on the device from within windows yet I can never get the device to mount from recovery. The only thing I can think of is to re-root/unlock the device and fastboot flash a new image to the device. Any thoughts?

beankid said:
I am trying to update my xoom to a new rom, ICS, and yet when I go into recovery to wipe data/cache, nothing gets touched by this command. I want to wipe the xoom clean and start over yet I can never get this command to work. I want to format the internal storage and start fresh yet every time I try this command all of the folders and apps and data are still left on the internal storage.
Any suggestions on how to get this fixed? I wanted to just mount the storage while in recovery and then perform a format on the device from within windows yet I can never get the device to mount from recovery. The only thing I can think of is to re-root/unlock the device and fastboot flash a new image to the device. Any thoughts?
Click to expand...
Click to collapse
Sometimes you have to mount /data and /system before those commands work. For some reason I see those file systems don't get mounted when cwm or twr loads.
Sent from my PG86100 using Tapatalk

[Q] TF101 Installing Custom ROM on Encrypted device

I recently managed to successfully root my TF101.
I installed CWM (Via ROM Manager) and downloaded CM9
I boot into CWM and attempt to do a nandroid...can't find path.
I attempt to just install from SDCard...can't find path
Realization (and research) hits that CWM can't see the external sd, and the system doesn't see it as SDCARD but EXT-.
CWM can't see the internal SDCard because apparently on the Tablet the ICS encryption locks that down (but doesn't on my EVO since the SC Card isn't part of the internal storage)
I attempt to perform a factory data wipe to clear out the encrtyption , but upon reboot CWM loads. I try to perform the boot-launcher data wipe, but then CWM loads.
I try to use CWM to factory reset but since it can see the damned SDCard because of the encryption, no dice.
My machine is not bricked, as I can still boot into the previous install but I can't seem unable to format the thing to install CM9.
What to do, and thanks.

It has been said multiple times before DO NOT USE ROM MANAGER.
Either use Thing O Doom's peri to install a different CWM or Gnufabio's Recovery installer or NVFlash a rom to completely wipe. And don't use encryption there is no point 99% of the time

I didn't check here first, which is obviously what was my first mistake.
Will any of those recoveries be able to access and format the SD Card area?
Also, I use encryption as I do have sensitive things on my machine that I don't want exposed in case the machine is stolen. First time I've ever had it give me a problem, as the phone encrypts differently.

Team roug's recovery has internal and external sd support and i think the encryption is an ics/tegra 2 bug more than anything

Ok, so I managed to get the new recovery on via Thing O Doom's peri. And I was able to install Revolver via the ext card...but upon boot I was prompted for my encryption pin and got the message that android was updating...My Build number is now Revolver but everything is the same as it was. I still can't factory wipe this damned thing.
Upon request to wipe, it boots back to recovery and says formatting data and cache, data wipe failed.
Tis site states http ://0xfeedface.org/blog/lattera/2012-06-04/installing-cm9-encrypted- android-tablet
The dilemma
When you encrypt your Android device, the /data partition is what gets encrypted. The partition in full is encrypted and cannot be mounted within CWM. CWM also cannot perform a wipe, since it cannot mount the /data partition. And CWM cannot mount the external SD card. This is our dilemma. No access to the internal SD. No access to the external SD. No way to perform a wipe and format the internal SD from CWM.
The Solution
What we need to do, then, is use adb while the tablet is in recovery mode to reformat the internal SD card, thereby removing the encryption. On the US Transformer Prime, the internal SD card is at /dev/block/mmcblk0p8. The partition for our spare SD card will be at /dev/block/mmcblk1p1. You will need to replace those device entries for any other device you might attempt this on. After formatting the internal SD card, we will mount it and then mount the external SD card at /data/media:
In CWM, wipe cache
adb shell
mke2fs -t ext4 /dev/block/mmcblk0p8 # Warning: This can take a while. Be patient.
mount /data
mount /dev/block/mmcblk1p1 /data/media
Now go back to CWM on your device, then go ahead and flash your CM9 and gapps zips like normal. You now have CM9 installed! The /data partition is not encrypted. If you do not need to flash any other ROMs (unlikely if you're reading this article), feel free to re-encrypt your device.
Click to expand...
Click to collapse
I don't know the block numbers for the TF01

you need to undo the encryption before you can wipe anything

You can't. Hence my problem. I cannot mount,delete, or format the SDCard. It sounds like the process in the above post is the solution, but I don't know how to find out what block numbers the tf101 uses.

If you don't mine losing your data NVflashing a rom will resolve all the problems

Yep nvflash will do the trick otherwise as the solution you found yourself explains
Use adb in recovery ( in other words hook it up on a pc ) for this you will need android sdk runnin on your pc
More info about adb u can find here
http://forum.xda-developers.com/showthread.php?t=1751439&highlight=adb+help
Good luck

Thanks to all, I have resolved my issue!
I had to download the stock rom, extract the blob, and use Wheelie for PC to NVFlash everthing abck to stock. I was then able to update over OTA, and use the excellent Thing O Doom's peri to re-root and flash the working recovery.
There should be several items in the Root FAQ up top, such as:
If you are encrypted and going to root, factory reset to get rid of the encryption FIRST since the encryption locks down the SDCARD partition (Unlike on the phone)and none of the recoveries can access it to mount. DON"T use ROM manage on the TF101 and always, always check XDA first.
:good:

darthrater said:
Thanks to all, I have resolved my issue!
I had to download the stock rom, extract the blob, and use Wheelie for PC to NVFlash everthing abck to stock. I was then able to update over OTA, and use the excellent Thing O Doom's peri to re-root and flash the working recovery.
There should be several items in the Root FAQ up top, such as:
If you are encrypted and going to root, factory reset to get rid of the encryption FIRST since the encryption locks down the SDCARD partition (Unlike on the phone)and none of the recoveries can access it to mount. DON"T use ROM manage on the TF101 and always, always check XDA first.
:good:
Click to expand...
Click to collapse
That FAQ is sadly pretty outdated, I wish I could liberate the OP
Glad all is working now though.

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 #

0 mb in TWRP internal storage

I searched for an answer and noticed it's a common issue. I am trying to flash a kernel on to my already flashed rom. I was wondering if there is a more current fix. More importantly, how can this be avoided in the future. Thank you guys!

Its caused by a bug/error with either the filesystem or encryption.
Did you wipe data after flashing the new ROM? Data from stock usually doesn't work with custom ROMs.
Do you have a PIN/password on Android?
Are you using the latest build of TWRP?
Press the menu button at the bottom of the screen in TWRP and post what the error message is in the red text.

It's caused by no root access

djhulk2 said:
It's caused by no root access
Click to expand...
Click to collapse
Something is probably wrong with the data partition. TWRP should always have root access.
Try in TWRP:
Wipe > Format Data > Slide to format
This will erase the data partition, so backup everything to a PC in Android first if needed. It should allow TWRP to mount /data again.

KemikalElite said:
Something is probably wrong with the data partition. TWRP should always have root access.
Try in TWRP:
Wipe > Format Data > Slide to format
This will erase the data partition, so backup everything to a PC in Android first if needed. It should allow TWRP to mount /data again.
Click to expand...
Click to collapse
I've debated on doing this. I'm not worried about losing pictures texts etc as they're backed up.
I read that it essentially leaves the device with no OS. If that's wrong please let me know!

I have found that if I choose Slot A and reboot system it reboots me in to TWRP. If I choose Slot B it runs the OS like normal (except I still have issues using Facebook and it's services).
The ROM works and I can perform all the custom mods on it. I just want to flash a kernel and the problem persists. 0 mb in storage.
It's trial and error at this point. Fail fast fail forward. I have another phone I can use but I love the OnePlus. Any help will be appreciated!

https://andi34.github.io/faq/faq_twrp.html
I'm not willing to risk it until I know how to get the custom ROM on to the storage to flash it.

Yes formating by typing in yes will wipe it all,everything including pictures, with no rom on it at all. If u choose to do that, don't close twrp. Instead you should be able mount after wards, once mounted transfer the magisk zip, twrp, and your custom rom(has to be 1.5gb not 200mb through magisk). Flash magesik, install ram disk twrp, install rom. That was a method I've done before but if u want to keep everything there is other way
fastboot boot twrp.img, that command boots twrp if u have it or don't, installing to ram disk makes it permant...this boot command is just a one time thing each time. It's what I do when new firmware update, I loose root but I regain it each time

Never heard of formating data removing the OS, that would be if you wipe the system and normal wipe is like a factory data reset and therefore will not wipe your phone of the OS

djhulk2 said:
Yes formating by typing in yes will wipe it all,everything including pictures, with no rom on it at all. If u choose to do that, don't close twrp. Instead you should be able mount after wards, once mounted transfer the magisk zip, twrp, and your custom rom(has to be 1.5gb not 200mb through magisk). Flash magesik, install ram disk twrp, install rom. That was a method I've done before but if u want to keep everything there is other way
fastboot boot twrp.img, that command boots twrp if u have it or don't, installing to ram disk makes it permant...this boot command is just a one time thing each time. It's what I do when new firmware update, I loose root but I regain it each time
Click to expand...
Click to collapse
I attempted to format. It said
"failed to mount /data (device or resource busy)
"unable to mount storage"

Try this in recovery, sometimes its known to work.
Wipe > Advanced Wipe > Check Data and press Repair or Change File System > Change File System > Change it to EXT2.
Repeat the same process selecting Ext4
Wipe > Advanced Wipe > Check Data and press Repair or Change File System > Change File System > Change it to back to EXT4.
Try formatting data after this.

drey4211 said:
I attempted to format. It said
"failed to mount /data (device or resource busy)
"unable to mount storage"
Click to expand...
Click to collapse
Since you dont care about the data on the phone I would just do 1 of 2 things. 1st I would reflash twrp on to you phone if that doesn't work then I would just grab the fastboot ROM and just flash your phone back to full stock reroot and install twrp from scratch. I would not try to start repairing partitions. I wouldn't want to worry about screwing up the EFS partition

Well in an update, I formatted the
Storage and now I'm stuck in bootloader screen. It's unlocked but I'm having a hard time flashing a ROM through adb.

I use the twrp version 3.3.1-2
Best would be to just use fast command to boot it
But it should be under wipe/format data/then type in yes

That was what I was trying to have you avoid. If your can boot to fastboot download the fastboot ROM I told you to and run the flash-all.bat file. If your on 9.5.8 make sure you use the fastboot ROM of the same version. Do not flash azip of a different version firmware like 9.5.7.

It happens to me any time I'm in twrp and flash a rom then reflash twrp. It doesn't matter if I flash Magisk or not the issue always happens. What I do is use a USB C flash drive and plug it in when I want to flash/backup a rom. This way I can always access it. After flashing any rom then booting I'm always able to access my internal storage again. It seems like a bug in twrp.
The strange part is when this bug happens your files are encrypted in a 0 folder but you can still copy from your PC to your internal storage while in twrp.

I essentially soft bricked my device. Called OnePlus and they got me up and running. That's awesome that they have that service!

Are you removing all security? Pattern, pin and fingerprints? Are you decrypted? Never had an issue with flashing a ROM causing these issues which is why I'm asking. Something you've done at some point is causing this

I'm not sure what that was. Ironically enough I am now stuck in TWRP boot loop. Hopefully I can figure this out otherwise I have to call oneplus again.
I will admit I may not know everything but it's trial and error. I don't have anyone to really teach me this so I try to read the forums and learn. You guys have been great!

ajsmsg78 said:
It happens to me any time I'm in twrp and flash a rom then reflash twrp. It doesn't matter if I flash Magisk or not the issue always happens. What I do is use a USB C flash drive and plug it in when I want to flash/backup a rom. This way I can always access it. After flashing any rom then booting I'm always able to access my internal storage again. It seems like a bug in twrp.
The strange part is when this bug happens your files are encrypted in a 0 folder but you can still copy from your PC to your internal storage while in twrp.
Click to expand...
Click to collapse
I've the same issue.. did you find a fix? So annoying