Database Develop

Error mounting data and cache

Hello Everyone
I have run into an odd problem. My tf701 ran out of power while I was watching netflix on it. After that it got stuck on boot. When I tried to fiddle using CWM I found out that I cannot mount data or cache. Further more I get to see 5 lines of "E: can't mount /recovery/*" where * are folders within /recovery/ . I tried to format system using CWM or fastboot, they both say they succeed but when I reboot I still get my bootanimation. At this I am out of ideas as to how I can fix it. Furthermore thanks to being unlocked I lost my warranty .
Any suggestions as to how I can fix it?

devbro said:
Hello Everyone
I have run into an odd problem. My tf701 ran out of power while I was watching netflix on it. After that it got stuck on boot. When I tried to fiddle using CWM I found out that I cannot mount data or cache. Further more I get to see 5 lines of "E: can't mount /recovery/*" where * are folders within /recovery/ . I tried to format system using CWM or fastboot, they both say they succeed but when I reboot I still get my bootanimation. At this I am out of ideas as to how I can fix it. Furthermore thanks to being unlocked I lost my warranty .
Any suggestions as to how I can fix it?
Click to expand...
Click to collapse
Maybe I saw something like this I dont know. Did you try mounting system first and see if that fixes it? I have no idea.
EDIT: from CWM I mean. I had a situtation where some things would not mount. data being one of them.. Not sure what else. Then I just mounted /system and everything was ok. Could it be that for some reason system is not getting mounted and you not formatting it besides an empty directory.

YayYouFixedIt said:
Maybe I saw something like this I dont know. Did you try mounting system first and see if that fixes it? I have no idea.
EDIT: from CWM I mean.
Click to expand...
Click to collapse
Yes I tried no luck. When I try to format /data using fastboot it simply hangs both the device and the terminal too.

devbro said:
Yes I tried no luck. When I try to format /data using fastboot it simply hangs both the device and the terminal too.
Click to expand...
Click to collapse
some corruption seems to have occurred.
perform a hard reset in the 'stock' recovery (this will format /data).
then boot in and re-setup. any userdata you had will be gone (including media/content stored locally, etc.).
in case of /system corruption (after performing the above; you still cannot boot in), you can format that partition separately and re-flash it from the CWM file for the latest posted stock update.
you can find file(s) on droidbasement, as needed.

I belive I have the same probleme, how i could i do it right?

devbro said:
Yes I tried no luck. When I try to format /data using fastboot it simply hangs both the device and the terminal too.
Click to expand...
Click to collapse
How did you try to format data in fastboot??
That's done in recovery afaik.
nero0345 said:
I belive I have the same probleme, how i could i do it right?
Click to expand...
Click to collapse
What problem do you have? /data not mounting? Format it in recovery but you will loose everything stored on your internal SD.

I finally took my tablet in for a check with asus. They said that I ahve corrupted my boot and since I replace the recovery there is no way to fix it. the only way to fix it is to replace the motherboard at this point. It will cost 190$ to replace!!!!

Just as an update to the future readers. I ended up replacing my logic board inside using one that I got from ebay. My tablet now works just as new. As per advice of the Asus tech, DO NOT FLASH a new recovery. If anything goes wrong the original asus recovery is the only way to fix things.

devbro said:
Just as an update to the future readers. I ended up replacing my logic board inside using one that I got from ebay. My tablet now works just as new. As per advice of the Asus tech, DO NOT FLASH a new recovery. If anything goes wrong the original asus recovery is the only way to fix things.
Click to expand...
Click to collapse
I beg to differ....
The stock recovery can only flash firmware signed by Asus and perform some crude wipe operations.
With a custom recovery you have way more tools at hand to fix problems:
You can wipe or format partitions selectively
You can take nandroids and restore them
You can check the integrity of file systems on partitions
You can fix permissions
You can flash SuperSU, custom roms and more
Some have a build in file manager allowing you to move data off the tablet even if it doesn't boot anymore
Some have a build in terminal you can run commands from.
The list goes on...
But sure - you have to do all of the above including flashing the custom recovery correctly or you can seriously damage your device like you did.
I am really sorry that you lost your mainboard and had to buy a new one, but don't kid yourself: It was not the custom recovery damaging your tablet. It was you...

berndblb said:
I beg to differ....
The stock recovery can only flash firmware signed by Asus and perform some crude wipe operations.
With a custom recovery you have way more tools at hand to fix problems:
You can wipe or format partitions selectively
You can take nandroids and restore them
You can check the integrity of file systems on partitions
You can fix permissions
You can flash SuperSU, custom roms and more
Some have a build in file manager allowing you to move data off the tablet even if it doesn't boot anymore
Some have a build in terminal you can run commands from.
The list goes on...
But sure - you have to do all of the above including flashing the custom recovery correctly or you can seriously damage your device like you did.
I am really sorry that you lost your mainboard and had to buy a new one, but don't kid yourself: It was not the custom recovery damaging your tablet. It was you...
Click to expand...
Click to collapse
When I talked to the tech at their center, there is apparently some special actions that only their recovery can do. These actions are those that allow changing boot table and other low level functions of the tablet which has nothing to do with the built-in memory or system files.
If I did not replace the recovery, then the repair by asus would have only cost 40$.

[Q] Help! HTC One M7 TWRP update problem, can't access storage??

Hi,
I have an HTC One m7 on T-Mobile, rooted and running Android Revolution 82.0.
I messed up, now I need help to dig myself out of this hole. I do not understand some of this, this could be partly due to my stupidity.
I backed up my system and boot in twrp before i had done any of this.
Last night I wanted to update TWRP. I downloaded "TWRP manager" through the play store, I opened the app and went down to "install twrp" - i installed TWRP 2.8.1.0 through the app, it said flashing successful. Everything was fine. I rebooted my phone into recovery to verify that it had worked. The correct twrp version was displayed at the top. I rebooted my phone into system. After the boot sequence it loaded into the first time run set up manager (by this i mean the thing that comes on when you turn on your phone for the very first time). This shocked me. I went through the procedure to "set up" my phone. All my apps were gone, all settings, everything. It looked as if it were brand new. Even the pre-loaded apps for android revolution were gone. I rebooted back into twrp recovery, went to the file manager and went to the main directory "/". I looked for the folder "/storage" but it wasnt there. I went to go restore my phone to the backups i had made before i tried updating twrp to see if that would help. Nothing changed. after this, I reinstalled the rom through TWRP without wiping anything. All my apps were still gone, all settings were gone, yet all my photos were still there. All of my files for the apps are all there, they are all in the internal storage, all the folders are still in /data , i do not understand what happened. I am also concerned that when I am in recovery and i am in the file manager i cannot see "/storage", as if it is hidden from the recovery file manager. Also, when i select "backup" and it gives me options to backup system, data, etc., under data it only shows 756 mb of data, i have at least 2000 mb, I am wondering if my phone is accessing the storage somewhere else? Please help me find out how to fix my errors. I wish to go back to where i was, or at least figure out what happened to increase my knowledge and NEVER do something like this again.
for some reason which i do not know, my sdcard files are saved in different places? i assume this is just how it's supposed to be. these loacations are : "/storage/emulated/0" - "/storage/emulated/legacy" - "/storage/sdcard0" - "/sdcard" (all of these folders have all of the same files etc.)
Thank you,
Evan

ImMrBS said:
Hi,
I have an HTC One m7 on T-Mobile, rooted and running Android Revolution 82.0.
I messed up, now I need help to dig myself out of this hole. I do not understand some of this, this could be partly due to my stupidity.
I backed up my system and boot in twrp before i had done any of this.
Last night I wanted to update TWRP. I downloaded "TWRP manager" through the play store, I opened the app and went down to "install twrp" - i installed TWRP 2.8.1.0 through the app, it said flashing successful. Everything was fine. I rebooted my phone into recovery to verify that it had worked. The correct twrp version was displayed at the top. I rebooted my phone into system. After the boot sequence it loaded into the first time run set up manager (by this i mean the thing that comes on when you turn on your phone for the very first time). This shocked me. I went through the procedure to "set up" my phone. All my apps were gone, all settings, everything. It looked as if it were brand new. Even the pre-loaded apps for android revolution were gone. I rebooted back into twrp recovery, went to the file manager and went to the main directory "/". I looked for the folder "/storage" but it wasnt there. I went to go restore my phone to the backups i had made before i tried updating twrp to see if that would help. Nothing changed. after this, I reinstalled the rom through TWRP without wiping anything. All my apps were still gone, all settings were gone, yet all my photos were still there. All of my files for the apps are all there, they are all in the internal storage, all the folders are still in /data , i do not understand what happened. I am also concerned that when I am in recovery and i am in the file manager i cannot see "/storage", as if it is hidden from the recovery file manager. Also, when i select "backup" and it gives me options to backup system, data, etc., under data it only shows 756 mb of data, i have at least 2000 mb, I am wondering if my phone is accessing the storage somewhere else? Please help me find out how to fix my errors. I wish to go back to where i was, or at least figure out what happened to increase my knowledge and NEVER do something like this again.
for some reason which i do not know, my sdcard files are saved in different places? i assume this is just how it's supposed to be. these loacations are : "/storage/emulated/0" - "/storage/emulated/legacy" - "/storage/sdcard0" - "/sdcard" (all of these folders have all of the same files etc.)
Thank you,
Evan
Click to expand...
Click to collapse
The answer to your mysterious factory reset lies here in this link. For further information see the link in this link
http://forum.xda-developers.com/showpost.php?p=55741117&postcount=83118
When in the TWRP file manger your /storage is a Folder called /sdcard.
And the multiple storage locations. Not all of these are actually physical locations you only have one memory chip with one set of files, the other locations are just emulated/virtual copies of your main storage
If you found my post helpful, no need to say thanks. There's a button for that

Danny201281 said:
The answer to your mysterious factory reset lies here in this link. For further information see the link in this link
http://forum.xda-developers.com/showpost.php?p=55741117&postcount=83118
When in the TWRP file manger your /storage is a Folder called /sdcard.
And the multiple storage locations. Not all of these are actually physical locations you only have one memory chip with one set of files, the other locations are just emulated/virtual copies of your main storage
If you found my post helpful, no need to say thanks. There's a button for that
Click to expand...
Click to collapse
So what I've gathered from this, is that all my apps are gone forever because I forgot to backup the data. And that is because "Then along comes the recent TWRP builds (2.7.1.2+) that read the bcb on boot. You flash it and boot into recovery, TWRP starts, reads the wipe_data command out of the bcb and proceeds to wipe the /data partition."? Also should I run the reset script in this post? http://forum.xda-developers.com/showpost.php?p=54370858&postcount=492
since I have a non-sprint htc one I'm not sure if this would do me harm or not. The reason I am asking all these questions is because I want to make sure I don't do something stupid again.

ImMrBS said:
So what I've gathered from this, is that all my apps are gone forever because I forgot to backup the data. And that is because "Then along comes the recent TWRP builds (2.7.1.2+) that read the bcb on boot. You flash it and boot into recovery, TWRP starts, reads the wipe_data command out of the bcb and proceeds to wipe the /data partition."? Also should I run the reset script in this post? http://forum.xda-developers.com/showpost.php?p=54370858&postcount=492
since I have a non-sprint htc one I'm not sure if this would do me harm or not. The reason I am asking all these questions is because I want to make sure I don't do something stupid again.
Click to expand...
Click to collapse
Yep that's about right. Running the script shouldn't do any harm but since you already experienced the Factory reset. The command should no longer be in your bcb anyway. As far as I'm aware this only happens once after a new flash and shouldn't repeat every time you use recovery.
But using the zip to clear your bcb is not a bad idea for piece of mind.

Different SD card partitions?

Disclaimer: I'm relatively new to the realm of modding the the kindle. I have a 2012 7" hd. I rooted it and loaded a 2nd bootloader and recovery via various tutorials. I attempted to to load a rom (lolipop 5.1 and corresponding gapps). The process seemed to go fine and when it booted into android the initial setup screens appeared (connect to wifi etc); but then I got a message that the setup wizard had failed. I tried "skipping" screens etc and regardless of what I did I couldn't get past that screen. I clearly either did something wrong or didn't have a good rom file. I was an idiot and didn't create a backup before flashing the new rom. So I mounted it in recovery and loaded a factory image that way and flashed back to norm. My intention was to start things over. I rooted again, went through the whole process; however, I'm seeing a weird phenomenon. When I am in windows (or ES explorer for that matter) and access the files on the sd card partition...I can load files onto there (for flashing in recovery etc); however, once I am actually in recovery and go to "install" the partition that I view in recovery is the files I had from the very first flash. I can create new files in windows or ES explorer and everything works as expected....but once in recovery, none of those folders are present...and the only zip files that are available to "install" are the ones I used the first time that didn't work. I'm clearly looking at some other partition or image in recovery than I am in windows. I have cleared cache and everything I can think of (again I'm a complete amateur). Does anyone have a suggestion of what I am doing wrong or how to resolve? Thanks in advance.
Cranky

The issue with your first problem was that it could have been a bad gapps, in the future try different gapps if you see weird problems like that, to your second problem, when flashing lollipop on a device that had ICS it'll change the directory of the SDcard, no biggie though, just search in recovery data/media/legacy or data/media/0 it should be in one of those that your files are in.
Sent from my Nexus 9 using Tapatalk

Try this.
Try to send files over using adb whilst in recovery. If you do not know how then watch this youtube(dot)com/watch?v=NaK5OxUeDKM
sorry im not allowed to post links because im a new user.

Decrypt OxygenOS without losing data

Hello there!
Today, after a bit of tinkering around I managed to get my OnePlus 3 in a decrypted state without losing data!
However, this is NOT a method where your data will remain on the phone, it requires you to copy a backup to your PC and then copy everything back + fix permissions. In this guide you'll completely wipe/reset your phone prior to restoring everything.
FAQ:
Q: Why do I need an undecrypted phone?
A: So far (as of today, 06.07.2016) multiboot will not work on encrypted phones. That's probably the only reason why you'll ever want to decrypt your phone.
Q: Will updating the ROM force encryption again?
A: If you're using OxygenOS (or another encryption forcing ROM), yes. However if you flash the Full ROM ZIP and immediately after that SuperSU (DO NOT USE SYSTEMLESS OR IT WILL ENCRYPT AGAIN!!!) WITHOUT REBOOTING it'll not encrypt the device again. (Thanks to @JumboMan)
Q: I've followed your guide but my phone got encrypted again!
A: You've probably used the Systemless SuperSU version which does indeed not prevent your device from being encrypted again. Use the normal version available HERE.
You'll need:
A PC (obviously)
Unlocked OnePlus 3 (will probably work on other OnePlus phones, not tested!)
TWRP Recovery (follow THIS LINK for a guide)
About 50 GB of free space on your PC (depends on how much data you have on the phone)
ADB and Fastboot drivers installed on your PC (to get those connect your OP3 to your PC, as storage choose MTP, open the emulated OnePlus CD-Drive and install those drivers)
(Optional) 15 Seconds ADB Installer
A bit of time, roughly 30 minutes to 1 hour
!!!DISCLAIMER!!!
I'M NOT RESPONSIBLE FOR ANYTHING YOU'RE ABOUT TO DO HERE, THIS GUIDE IS PURELY WRITTEN "OUT OF MY HEAD" AND I CANNOT CONFIRM ANY OF THE FOLLOWING STEPS ANYMORE!!!!
ONLY DO THIS IF YOU KNOW HOW TO RECOVER FROM A HALF-INSTALLED OR COMPLETELY WIPED SYSTEM!!!​
How To:
READ AND ACKNOWLEDGE THE DISCLAIMER ABOVE!
Done? Are you really sure? ... Okay!
If you don't need your data backed up simply start at Step 10 and ignore the restore parts after that.
Still on OxygenOS (or any other ROM) make sure you've enabled ADB in Developer Options and connected + allowed your PC at least one time, else ADB in TWRP will not work.
If you have Titanium Backup, create a backup of all your apps before starting. Just in case, you never know...
Once done boot into TWRP (see above for an installation guide)
Create a normal TWRP backup
Type in "adb devices" to check if you're allowed to use ADB inside TWRP. If it says "unauthorized" refer to Step 1 again.
Once done open up a CMD on your PC and cd to the directory you want all your backup-files to be (or navigate via Windows Explorer to the folder, hold "Shift", right-click and choose "Open command window here...")
Type in "adb pull /data/media" and wait. Depending on the size this can take a few minutes.
After that's done make sure all your files are here and ADB is not reporting any skipped files.
Checked all your files? Okay!
In TWRP choose "Reboot" and "Bootloader". This will put your phone into Fatboot mode.
Type in "fastboot devices" to check if your phone is recognized. If not go into device manager, find the Google Bootloader drivers and install those.
NOW IS YOUR LAST CHANCE TO MAKE SURE EVERYTHING'S BACKED UP AND THERE!
Next type in "fastboot format userdata" and hit enter. This will completely wipe your device.
Boot back into TWRP by using the volume rocker and the Power Button.
ADB is probably not working now (will only report "unauthorized"), MTP however still works. Copy the TWRP folder we backed up earlier onto the device again.
Once copying finished restore the backup and reboot into recovery again. You're now able to use ADB due to the adbpub.key being present again. (You could've done this earlier but it's easier that way.)
Copy the rest back onto the device with "adb push / /data/media". (I'm not really sure if this command is right, beware!)
Now type "adb shell chown -R media_rw:media_rw /data/media" to fix issues later in the ROM.
You're basically finished now! Simply reboot and wait till it boots up again. If you're getting stuck at a "Wrong PIN" or "Wrong Pattern" screen SEE THIS COMMENT I made in another thread.
Finished!
As said, I'm not sure if I forgot something here or not. However I think I got everything covered

Thank you. This was a much needed guide for all of us
Sent from my ONEPLUS A3003 using Tapatalk

Nice

Noob questions: is the decrypted OS faster? Performances of the phone are the same? What about updates (any update will crypt it again?
Thanks for any feedback!
Sent from my OnePlus3 using XDA Labs

IlD4nX said:
Noob questions: is the decrypted OS faster? Performances of the phone are the same? What about updates (any update will crypt it again?
Thanks for any feedback!
Sent from my OnePlus3 using XDA Labs
Click to expand...
Click to collapse
Performance is about the same.
I have no idea if updates will crypt it again, I think not tho? Not sure.

ota updates might encrypt it again if you're on stock. depending if there's a new kernel. the kernel I think forces encryption. so we need a modified boot img to disable forced encryptions. or use a custom kernel that disables force encryption.
If you're on a custom rom based on aosp/cm. most of them doesn't force encryption. so there's no need to worry.
Sent from the moon and back

Thanks for the guide, will this wipe my internal storage?

daavid1995 said:
Thanks for the guide, will this wipe my internal storage?
Click to expand...
Click to collapse
Yes, however the guide shows you how to get a backup of ALL your files before anything gets wiped.
Ajo, und servus aus Österreich

IlD4nX said:
Noob questions: is the decrypted OS faster? Performances of the phone are the same? What about updates (any update will crypt it again?
Thanks for any feedback!
Sent from my OnePlus3 using XDA Labs
Click to expand...
Click to collapse
Yes. updates will encrypt data again.
if you want to remain non encrypted after update then following procedure.
1. download full rom zip (not ota zip)
2.flash full update zip
3.without rebooting after flashing update just flash SuperSU zip. SuperSU will patch your boot img to remain in non encrypted state.
Proof- myself tried it on 3.2.0 update and it works without any problem

JumboMan said:
Yes. updates will encrypt data again.
if you want to remain non encrypted after update then following procedure.
1. download full rom zip (not ota zip)
2.flash full update zip
3.without rebooting after flashing update just flash SuperSU zip. SuperSU will patch your boot img to remain in non encrypted state.
Proof- myself tried it on 3.2.0 update and it works without any problem
Click to expand...
Click to collapse
Added to the OP Thanks for testing!

Thanks, i will try
Dere haha :fingers-crossed::good:
EpicLPer said:
Yes, however the guide shows you how to get a backup of ALL your files before anything gets wiped.
Ajo, und servus aus Österreich
Click to expand...
Click to collapse

maybe stupid questions, but not clear for me:
is there a negative point decrypting the phone or are there any risks?
will decrypting have an effect on the security of the phone?

odooo said:
maybe stupid questions, but not clear for me:
is there a negative point decrypting the phone or are there any risks?
will decrypting have an effect on the security of the phone?
Click to expand...
Click to collapse
As long as you're not an "international searched criminal" where the FBI tries to break into your phone then, no
I'd say it is a bit less secure but who cares, anyone who wants access to your phone somehow gets it anyways, TWRP isn't helping here either since anyone can simply boot into recovery and recover all files from there nonetheless.
Decryption risks are only when you're not good at backing up your data, else there are no risks of doing so.

@EpicLPer:
17. Copy the rest back onto the device with "adb push / /data/media". (I'm not really sure if this command is right, beware!)
Click to expand...
Click to collapse
"adb push / /data/media" doesnt work for me. Can somebody help? I restored the TWRP-Backup and only need to copy the rest on the device.
Edit: I did it in another way, copied all files manually.

Can someons dcrypt this
IzpG+nubzE2m3krvbos0lVDLANkIkiekZt209MYU12Vzny8WNOS7o4JGNoVAm41e/44IYPHmh
0Y7NnLW1JghbWJwbzL1WIpQw7nkzQoH9dEwvTiloTg5BI1u9TYRExzLGQEDUqN2hjq1G5cn
CqDmYoQnMs2bMiuajZweq9ZDC7gLruq6dse0L96gzZFoC/33lF0h1mEh7SBgW3FrcsjhRQ==
Sent from my SM-N910P using XDA-Developers mobile app

Worked, Thanks

How can I check if my device is decrypted or encrypted?

odooo said:
How can I check if my device is decrypted or encrypted?
Click to expand...
Click to collapse
Go to Settings > Device Security and check if it says encrypted or if it gives you the option to encrypt. If second, you know it's decrypted.

Can somebody do some benchmarks? I am really curious whether it makes a difference or not.
from what I've heard it makes a big difference in sequential rw speeds, which are actually pretty important on android.

Will it wipe my rom too?? Or just internal storage??
---------- Post added at 04:03 PM ---------- Previous post was at 03:31 PM ----------
EpicLPer said:
Hello there!
Today, after a bit of tinkering around I managed to get my OnePlus 3 in a decrypted state without losing data!
However, this is NOT a method where your data will remain on the phone, it requires you to copy a backup to your PC and then copy everything back + fix permissions. In this guide you'll completely wipe/reset your phone prior to restoring everything.
FAQ:
Q: Why do I need an undecrypted phone?
A: So far (as of today, 06.07.2016) multiboot will not work on encrypted phones. That's probably the only reason why you'll ever want to decrypt your phone.
Q: Will updating the ROM force encryption again?
A: If you're using OxygenOS (or another encryption forcing ROM), yes. However if you flash the Full ROM ZIP and immediately after that SuperSU WITHOUT REBOOTING it'll not encrypt the device again. (Thanks to @JumboMan)
You'll need:
A PC (obviously)
Unlocked OnePlus 3 (will probably work on other OnePlus phones, not tested!)
TWRP Recovery (follow THIS LINK for a guide)
About 50 GB of free space on your PC (depends on how much data you have on the phone)
ADB and Fastboot drivers installed on your PC (to get those connect your OP3 to your PC, as storage choose MTP, open the emulated OnePlus CD-Drive and install those drivers)
(Optional) 15 Seconds ADB Installer
A bit of time, roughly 30 minutes to 1 hour
!!!DISCLAIMER!!!
I'M NOT RESPONSIBLE FOR ANYTHING YOU'RE ABOUT TO DO HERE, THIS GUIDE IS PURELY WRITTEN "OUT OF MY HEAD" AND I CANNOT CONFIRM ANY OF THE FOLLOWING STEPS ANYMORE!!!!
ONLY DO THIS IF YOU KNOW HOW TO RECOVER FROM A HALF-INSTALLED OR COMPLETELY WIPED SYSTEM!!!
How To:
READ AND ACKNOWLEDGE THE DISCLAIMER ABOVE!
Done? Are you really sure? ... Okay!
If you don't need your data backed up simply start at Step 10 and ignore the restore parts after that.
Still on OxygenOS (or any other ROM) make sure you've enabled ADB in Developer Options and connected + allowed your PC at least one time, else ADB in TWRP will not work.
If you have Titanium Backup, create a backup of all your apps before starting. Just in case, you never know...
Once done boot into TWRP (see above for an installation guide)
Create a normal TWRP backup
Type in "adb devices" to check if you're allowed to use ADB inside TWRP. If it says "unauthorized" refer to Step 1 again.
Once done open up a CMD on your PC and cd to the directory you want all your backup-files to be (or navigate via Windows Explorer to the folder, hold "Shift", right-click and choose "Open command window here...")
Type in "adb pull /data/media" and wait. Depending on the size this can take a few minutes.
After that's done make sure all your files are here and ADB is not reporting any skipped files.
Checked all your files? Okay!
In TWRP choose "Reboot" and "Bootloader". This will put your phone into Fatboot mode.
Type in "fastboot devices" to check if your phone is recognized. If not go into device manager, find the Google Bootloader drivers and install those.
NOW IS YOUR LAST CHANCE TO MAKE SURE EVERYTHING'S BACKED UP AND THERE!
Next type in "fastboot format userdata" and hit enter. This will completely wipe your device.
Boot back into TWRP by using the volume rocker and the Power Button.
ADB is probably not working now (will only report "unauthorized"), MTP however still works. Copy the TWRP folder we backed up earlier onto the device again.
Once copying finished restore the backup and reboot into recovery again. You're now able to use ADB due to the adbpub.key being present again. (You could've done this earlier but it's easier that way.)
Copy the rest back onto the device with "adb push / /data/media". (I'm not really sure if this command is right, beware!)
Now type "adb shell chown -R media_rw:media_rw /data/media" to fix issues later in the ROM.
You're basically finished now! Simply reboot and wait till it boots up again. If you're getting stuck at a "Wrong PIN" or "Wrong Pattern" screen SEE THIS COMMENT I made in another thread.
Finished!
As said, I'm not sure if I forgot something here or not. However I think I got everything covered
Click to expand...
Click to collapse
Will it wipe my rom too?? Or just internal storage??

zenfone 2 (z00d) not booting

Hello, a few days ago my zenfone started acting up (again), with built in applications crashing randomly and failing to boot half of the times. I always managed to fix it downloading the firmware from Asus' website and re-upgrate it, but this time it didn't worked out quite well. It now refuses to boot (sometimes gets stucked at boot, simetimes I manage to have asus screen). Booting into recovery prints `E:mount fail, change path to mount /dev/block/mmcblk1`, then errors about cache partiton not being found.
I've tried pretty much anything that would not result in data loss:
Wiping cache doesn't report errors, but doesn't help either,
Flashing stock boot.img and droidboot.img don't report error, but doesn't help either,
Flashing TWRP to recovery reports success, but I still get stock recovery,
Sideload fails coz it doesn't find expected mounts
Adb shell doesn't work as it can't find `/system/bin/whatever`
`adb pull /proc/partitions` returns what looks like a legit partitions list for mmcblk0 to me
Does anyone know what else I can try to rescue the data on the phone?

WobLight said:
Hello, a few days ago my zenfone started acting up (again), with built in applications crashing randomly and failing to boot half of the times. I always managed to fix it downloading the firmware from Asus' website and re-upgrate it, but this time it didn't worked out quite well. It now refuses to boot (sometimes gets stucked at boot, simetimes I manage to have asus screen). Booting into recovery prints `E:mount fail, change path to mount /dev/block/mmcblk1`, then errors about cache partiton not being found.
I've tried pretty much anything that would not result in data loss:
Wiping cache doesn't report errors, but doesn't help either,
Flashing stock boot.img and droidboot.img don't report error, but doesn't help either,
Flashing TWRP to recovery reports success, but I still get stock recovery,
Sideload fails coz it doesn't find expected mounts
Adb shell doesn't work as it can't find `/system/bin/whatever`
`adb pull /proc/partitions` returns what looks like a legit partitions list for mmcblk0 to me
Does anyone know what else I can try to rescue the data on the phone?
Click to expand...
Click to collapse
When you flash TWRP and try to boot into recovery, have you tried using adb with "adb reboot" command?
Have you tried the "fastboot boot twrp.img" command"(with the TWRP file renamed to "twrp.img")? If you can get that to work, you can temporarily boot a TWRP session and then use it to make a nandroid backup.
Have you tried creating an adb backup, as described in the link below?
https://forum.xda-developers.com/galaxy-nexus/general/guide-phone-backup-unlock-root-t1420351
If you have corrupted partitions, you might not retrive anything, you might have no choice but to use an option that wipes, repartitions and flashes the device.
Sent from my LGL84VL using Tapatalk

Droidriven said:
When you flash TWRP and try to boot into recovery, have you tried using adb with "adb reboot" command?
Have you tried the "fastboot boot twrp.img" command"(with the TWRP file renamed to "twrp.img")? If you can get that to work, you can temporarily boot a TWRP session and then use it to make a nandroid backup.
Have you tried creating an adb backup, as described in the link below?
https://forum.xda-developers.com/galaxy-nexus/general/guide-phone-backup-unlock-root-t1420351
If you have corrupted partitions, you might not retrive anything, you might have no choice but to use an option that wipes, repartitions and flashes the device.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
thanks for suggestions,
adb backup doesn't work. It complains about /system/bin/sh not found (looks like either the partition isn't mounted or the failed update erased it).
fastboot boot doesn't work. I was messing with boot.img before, and I found out that intel's boot.img (my zenfone is x86) is not standard format. fastboot logs `creating boot image...`, I suspect it doesn't work at all for intel's. It reports 'booting OK' but the phone doesn't reboot at all.
fastboot flash recovery twrp.img returns OK but still stock recovery...

WobLight said:
thanks for suggestions,
adb backup doesn't work. It complains about /system/bin/sh not found (looks like either the partition isn't mounted or the failed update erased it).
fastboot boot doesn't work. I was messing with boot.img before, and I found out that intel's boot.img (my zenfone is x86) is not standard format. fastboot logs `creating boot image...`, I suspect it doesn't work at all for intel's. It reports 'booting OK' but the phone doesn't reboot at all.
fastboot flash recovery twrp.img returns OK but still stock recovery...
Click to expand...
Click to collapse
I have an intel atom tablet that I used this tool to boot TWRP then root and create nandroid backups with.
https://forum.xda-developers.com/android/development/intel-android-devices-root-temp-cwm-t2975096
There may be similar tools for your intel tablet, or maybe you can modify this tool or work out something similar.
There is another similar tool that I used on an intel based RCA Viking III tablet.
Sent from my LGL84VL using Tapatalk

Droidriven said:
I have an intel atom tablet that I used this tool to boot TWRP then root and create nandroid backups with.
https://forum.xda-developers.com/android/development/intel-android-devices-root-temp-cwm-t2975096
There may be similar tools for your intel tablet, or maybe you can modify this tool or work out something similar.
There is another similar tool that I used on an intel based RCA Viking III tablet.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
It worked!!! :victory:
Thank you so much for helping me out with this, I spent over a week trying to fix/backup data, I was going to give up.
After backing up things properly I'll play with it, see if I can have it booting again (maybe not stock system ).

WobLight said:
It worked!!! :victory:
Thank you so much for helping me out with this, I spent over a week trying to fix/backup data, I was going to give up.
After backing up things properly I'll play with it, see if I can have it booting again (maybe not stock system ).
Click to expand...
Click to collapse
Be careful, this tool is built to work on a lot of different devices with different hardware and different partitioning, the differences in partitions means that it cannot create or restore nandroid backups on all devices that the tool can boot on. Some intel devices that this tool works on can create and restore nandroid backups, some can't, it just depends on how the device is partitioned. It can also be used to flash ROMs on some devices but not on others.
This tool can boot a temporary recovery session on a lot of devices but not all of them can use all of the features in the recovery that it boots.
This difference in partitioning means that trying to restore a backup or flash a ROM can break some devices because the partitioning isn't right. So just be warned, you will be exposing your device to a certain amount of risk if you try using all of the features in the temporary recovery session.
Also, this tool was designed to boot a temporary recovery session on intel devices that have a locked bootloader, this recovery session can not flash ROMs on intel devices that have a locked bootloader, it can only be used to flash devices that have an unlocked bootloader. If your bootloader is locked, you'll brick your device if you attempt flashing a ROM on your device using this recovery session.
Sent from my LGL84VL using Tapatalk

Droidriven said:
Be careful, this tool is built to work on a lot of different devices with different hardware and different partitioning, the differences in partitions means that it cannot create or restore nandroid backups on all devices that the tool can boot on. Some intel devices that this tool works on can create and restore nandroid backups, some can't, it just depends on how the device is partitioned. It can also be used to flash ROMs on some devices but not on others.
This tool can boot a temporary recovery session on a lot of devices but not all of them can use all of the features in the recovery that it boots.
This difference in partitioning means that trying to restore a backup or flash a ROM can break some devices because the partitioning isn't right. So just be warned, you will be exposing your device to a certain amount of risk if you try using all of the features in the temporary recovery session.
Also, this tool was designed to boot a temporary recovery session on intel devices that have a locked bootloader, this recovery session can not flash ROMs on intel devices that have a locked bootloader, it can only be used to flash devices that have an unlocked bootloader. If your bootloader is locked, you'll brick your device if you attempt flashing a ROM on your device using this recovery session.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
Thank for your concern, I've backed up contents of the sdcard and data partition (other partitions fails to mount) to an external SD. Ofc sdcard contents are just copy/pasted, as for data partition I've checked and looks like I can open the twrp archives from linux. I'm gonna try to clone the whole mmcblk0 before trying anything weird tho .

WobLight said:
Thank for your concern, I've backed up contents of the sdcard and data partition (other partitions fails to mount) to an external SD. Ofc sdcard contents are just copy/pasted, as for data partition I've checked and looks like I can open the twrp archives from linux. I'm gonna try to clone the whole mmcblk0 before trying anything weird tho .
Click to expand...
Click to collapse
You might can modify the tool itself or the TWRP .img that is built into the tool to modify it to work with the way that your device is partitioned, that way it mounts, reads and writes those partitions correctly.
Sent from my LGL84VL using Tapatalk

Droidriven said:
You might can modify the tool itself or the TWRP .img that is built into the tool to modify it to work with the way that your device is partitioned, that way it mounts, reads and writes those partitions correctly.
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
I've tried to use the twrp for z00d I have previously downloaded, I have to do some tweaking to make it boot. Even tho it looks like a newer version, console is crashing and partitions won't work anyway. Since stock recovery fails to mount cache I guess there's corruption somewhere on the device. I might have found the stock partitions.tbl, but if I manage to clone mmcblk0 to an external sd, I can perhaps mess with the image with linux and confirm whether is there's corruption.

WobLight said:
I've tried to use the twrp for z00d I have previously downloaded, I have to do some tweaking to make it boot. Even tho it looks like a newer version, console is crashing and partitions won't work anyway. Since stock recovery fails to mount cache I guess there's corruption somewhere on the device. I might have found the stock partitions.tbl, but if I manage to clone mmcblk0 to an external sd, I can perhaps mess with the image with linux and confirm whether is there's corruption.
Click to expand...
Click to collapse
Here is another tool that I used on an intel based RCA tablet, it might can be adapted to be used on your device if you know or can find out where the tool can be modified to work on your device.
https://forum.xda-developers.com/general/general/guide-rca-voyager-rct6873w42-unlock-t3582973
Sent from my LGL84VL using Tapatalk

Droidriven said:
Here is another tool that I used on an intel based RCA tablet, it might can be adapted to be used on your device if you know or can find out where the tool can be modified to work on your device.
https://forum.xda-developers.com/general/general/guide-rca-voyager-rct6873w42-unlock-t3582973
Sent from my LGL84VL using Tapatalk
Click to expand...
Click to collapse
Hello, I've tried a few more stuff today, by the looks of it, the device silently fails to write anything.
I've tried to use adb push to flash a fixed image to /dev/block/mmcblk0, tried fastboot flash, tried dd from the recovery, even tho it reports ok, nothing is actually written on the device. I've tried to rename a file in data (which does mount), but after unmounting/remounting the partition the file still have the old name.
Maybe I can try loading a system on the external sd instead, but that's it.
Thanks again for your help, I was able to recover the data which was actually my priority.
EDIT: partition command also fails