How do recover data from unrooted and boot-looped LG L9-II? - Android Q&A, Help & Troubleshooting

Dear users,
I read multiple threads throughout internet and couldn't find working solution. My lg with kitkat 4.4.2 had lagged so I removed battery. After this phone is boot-looping with startup animation forever.
I can explore files with adb shell when phone is in recovery mode but don't have access to dalvik-cache. Command "su rm -rf /system/data/dalvik-cache" gives "permission denied nor "adb backup -all" cause "unlock your device and confirm...".
I cannot root phone by copying SuperSu files into /system/app. The command "su cp.. " gives no answer and later when exploring /app there's no SuperSu program.
I was trying to explore through sudo nautilus on Ubuntu during using one of rooting tutorial but the phone just disappears in the list of mounted devices.
I have important data like phone contacts, messages and some pictures inside phone memory. I didn't backup all of them formerly.
Any ideas?

likkufri said:
Dear users,
I read multiple threads throughout internet and couldn't find working solution. My lg with kitkat 4.4.2 had lagged so I removed battery. After this phone is boot-looping with startup animation forever.
I can explore files with adb shell when phone is in recovery mode but don't have access to dalvik-cache. Command "su rm -rf /system/data/dalvik-cache" gives "permission denied nor "adb backup -all" cause "unlock your device and confirm...".
I cannot root phone by copying SuperSu files into /system/app. The command "su cp.. " gives no answer and later when exploring /app there's no SuperSu program.
I was trying to explore through sudo nautilus on Ubuntu during using one of rooting tutorial but the phone just disappears in the list of mounted devices.
I have important data like phone contacts, messages and some pictures inside phone memory. I didn't backup all of them formerly.
Any ideas?
Click to expand...
Click to collapse
Could you elaborate on "disappears?" Usually if something is present and suddenly disappears in lubuntu, that means the connection was broken (either physically or by software, such as when switching drivers by running a command). Anyway, have you tried letting it sit for a day or something? I figure the reason it "lags" might potentially affect booting time.
It's also helpful to know what data you want out of it. Some things need root, some things don't need root. If all you want is file X in user space, I imagine that'd be infinitely easier than trying to get a random bootloader setting.

Related

Can someone get....

I'm in need of the stock kernal image and the clockwork recovery.zip file thingy.
NOT the zip verson of the kernal installer.
My situation, I was stupid and installed the voodoo thing, then for someone reason I tried to flash Froyo over Bionix with the voodoo kernal thing. It didnt work so I decided to deleted everything in clockwork. Then I was like omg I cant use clock work or boot my device (stuck on vibrant screen but I can get to odin and the stock recovery).
Later I read that voodoo stopped odin on the cm forum so I couldnt use it. Thats what some dude named viralblack said and theyre a mod so I'm guessing its true.
So my last 4 ideas are:
1)Try and flash a new Kernal Image in adb and hope it gets odin to work
2)Push the cw recovery to the phone
3)Run to the library and hope my computer is the problem
4)Pretend vb is wrong and keep trying the download screen thing
Sorry if this is in the wrong section but I guessed it could go here because I need some files....
flash Eugene's froyo that does not brick via Odin. he has instructions in his thread.
...and it's kernel NOT kernal people
Sent from my SGH-T959 using XDA App
kernel, sorry I guess?
Anyhow what if my pc doesnt notice the phone when its in download mode
RPGbig said:
kernel, sorry I guess?
Anyhow what if my pc doesnt notice the phone when its in download mode
Click to expand...
Click to collapse
Download the Samsung drivers, download ODIN, and then just follow the directions in the ODIN thread
Wow
You guys have nothing better to do than flame a newb?
If you spent half the time helping instead of flaming there MIGHT just be some people with a bit more knowledge than they had yesterday.
If you cant say something constructive/helpful --Why bother!
fcbarca17 said:
Download the Samsung drivers, download ODIN, and then just follow the directions in the ODIN thread
Click to expand...
Click to collapse
Push doesnt seem to work. Permission denied or something rather.
As I said in my first odin wont work, yes I did those things like 10 or so times.
You cant expect a newborn to know how to wipe themselves.
RPGbig said:
Push doesnt seem to work. Permission denied or something rather.
As I said in my first odin wont work, yes I did those things like 10 or so times.
You cant expect a newborn to know how to wipe themselves.
Click to expand...
Click to collapse
What do you mean "push doesn't work". Are you trying to push a file via adb? If you are getting permission denied errors, that is because you either do not have root access/permissions to write to the location you are trying to push to, or because the location you are trying to push to is mounted as read-only.
If you indeed have the necessary permissions (i.e., root), then `adb remount` will re-mount the device's partitions as read-write. If adb does not allow you remount the partitions in this manner, it is because you do not have the permissions to perform the duty.
If anyone is going to give any further help, though, you need to give us a bit more information. Can you access the device via adb? Can you boot into either download or recovery? (If you have adb access, you can usually boot into either of those with `adb shell reboot download` or `adb shell reboot recovery`.) Have you attempted to flash anything via Odin? What is the exact wording of the error messages you are receiving?
If you don't provide information, you won't receive any help. Vague responses such as "Permission denied or something rather" are useless because something rather can be any number of things. Also, attempting things without reading all of the information available beforehand is another way to ensure that people will be hesitant to give you help; this forum already has threads about where to locate the stock kernel image.
Also, instead of positing what-ifs such as "Anyhow what if my pc doesnt notice the phone when its in download mode", why don't you try putting your device into download mode and attaching it to a Windows computer with the proper drivers installed and Odin running, and then ask what the next step might be after you have attempted to do something?
People get angry about members flaming newbies for posting mistakes and asking for help, but if newbies looked for answers and read all of the information available before doing something they didn't understand (or only partially understood), then this wouldn't be a problem in the first place.
rpcameron said:
What do you mean "push doesn't work". Are you trying to push a file via adb? If you are getting permission denied errors, that is because you either do not have root access/permissions to write to the location you are trying to push to, or because the location you are trying to push to is mounted as read-only.
If you indeed have the necessary permissions (i.e., root), then `adb remount` will re-mount the device's partitions as read-write. If adb does not allow you remount the partitions in this manner, it is because you do not have the permissions to perform the duty.
Click to expand...
Click to collapse
Goalush Clockwork Recovery so I can flash Bionix.
What Happens:
1. Go into recovery
2. Connect to the phone with adb
3. I type 'adb push c:\update.zip /sdcard'
4. It says 'failed to copy `c:\update.zip` to `/sdcard/update.zip` : Permission denied
I type 'adb remount' its says ' remount failed: No such file or directory
rpcameron said:
If anyone is going to give any further help, though, you need to give us a bit more information. Can you access the device via adb? Can you boot into either download or recovery? (If you have adb access, you can usually boot into either of those with `adb shell reboot download` or `adb shell reboot recovery`.) Have you attempted to flash anything via Odin? What is the exact wording of the error messages you are receiving?
Click to expand...
Click to collapse
Yes, I can get into both.
I've download Froyo that doesnt brick. Unziped and got had the drivers from sansumg set up.
I usually type 'adb reboot download' to get into download mode for odin. Then when the phone shows the android guy with the shovel. Then my computer says that an unrecognized usb device has been connect.
This time I type 'adb shell reboot recovery' and its said
'-exce `/system/bin/sh` failed: No such file or directory (2) -'
rpcameron said:
If you don't provide information, you won't receive any help. Vague responses such as "Permission denied or something rather" are useless because something rather can be any number of things. Also, attempting things without reading all of the information available beforehand is another way to ensure that people will be hesitant to give you help; this forum already has threads about where to locate the stock kernel image.
Also, instead of positing what-ifs such as "Anyhow what if my pc doesnt notice the phone when its in download mode", why don't you try putting your device into download mode and attaching it to a Windows computer with the proper drivers installed and Odin running, and then ask what the next step might be after you have attempted to do something?
People get angry about members flaming newbies for posting mistakes and asking for help, but if newbies looked for answers and read all of the information available before doing something they didn't understand (or only partially understood), then this wouldn't be a problem in the first place.
Click to expand...
Click to collapse
RPGbig said:
Goalush Clockwork Recovery so I can flash Bionix.
What Happens:
1. Go into recovery
2. Connect to the phone with adb
3. I type 'adb push c:\update.zip /sdcard'
4. It says 'failed to copy `c:\update.zip` to `/sdcard/update.zip` : Permission denied
Click to expand...
Click to collapse
You have to be rooted.. But why would you even take the hard way to use clockwork? Just download it from the market..?
I have odin with all the files that will get u to stock of ur phone. Also the froyo files does not brick. So now i exactly dont know what u need. go cows
I messed up my phone and its stuck in a bootloop. I want to put that recovery on my phone so I can flash a new rom.
RPGbig said:
I messed up my phone and its stuck in a bootloop. I want to put that recovery on my phone so I can flash a new rom.
Click to expand...
Click to collapse
If your phone is stuck in a bootloop you need to flash your phone with odin
RPGbig said:
Goalush Clockwork Recovery so I can flash Bionix.
What Happens:
1. Go into recovery
2. Connect to the phone with adb
3. I type 'adb push c:\update.zip /sdcard'
4. It says 'failed to copy `c:\update.zip` to `/sdcard/update.zip` : Permission denied
I type 'adb remount' its says ' remount failed: No such file or directory
Click to expand...
Click to collapse
OK, if `adb remount` isn't working properly, then you have to manually instruct the system to remount the system partition as read-write. This is a little different from other Android devices, because Samsung insists on using their screwy RFS. On my device, the system partition resides at /dev/block/st19. If you can get an adb shell session, opened, you can verify it by running `mount`, and seeing which /dev node is assigned to /system. Then, manually remount the system partition with `mount -o remount,rw -t rfs /dev/block/st19 /system`; this must be done as root.
It does seem a bit odd that you are getting a permission denied error on /sdcard. Are you sure that /sdcard is mounted? You can verify the same way you check what /dev node holds you system partition. On my Vibrant, /sdcard is the mount point for /dev/block//vold/179:1 (yes, that is two slashes after block). So, the command to mount the internal SD card is `mount -o remount,rw -t vfat /dev/block//vold/179:1 /sdcard`.
Now those commands should ensure that you have both your system partition and SD card mounted as read-write. Now you can copy over the update.zip that contains ClockworkMod recovery to the root of your SD card (/sdcard) with `adb push drive:\path\to\recovery.zip /sdcard/update.zip`. I recommend specifying a destination filename for update.zip. Also, sometimes an adb push command requires the trailing / of a directory.
RPGbig said:
Yes, I can get into both.
I've download Froyo that doesnt brick. Unziped and got had the drivers from sansumg set up.
I usually type 'adb reboot download' to get into download mode for odin. Then when the phone shows the android guy with the shovel. Then my computer says that an unrecognized usb device has been connect.
This time I type 'adb shell reboot recovery' and its said
'-exce `/system/bin/sh` failed: No such file or directory (2) -'
Click to expand...
Click to collapse
This last statement looks like either your system partition is not mounted, or that it does not have a shell installed. From an adb shell session, check the /system/bin directory and see if there is indeed a shell binary there (either sh itself, or sh linked to another shell such as bash). If there is no /system, then it means that your system partition is not mounted, and you can follow the steps I previously mentioned to mount the system partition.
RPGbig said:
I messed up my phone and its stuck in a bootloop. I want to put that recovery on my phone so I can flash a new rom.
Click to expand...
Click to collapse
Can you boot into recovery using the VOL_DN and POWER method, or does the adb daemon ever come online during the bootloop? If so, then either boot into recovery from a powered-off state, or use the adb shell to boot it into recovery.
http://forum.xda-developers.com/showthread.php?t=810130
rpcameron said:
OK, if `adb remount` isn't working properly, then you have to manually instruct the system to remount the system partition as read-write. This is a little different from other Android devices, because Samsung insists on using their screwy RFS. On my device, the system partition resides at /dev/block/st19. If you can get an adb shell session, opened, you can verify it by running `mount`, and seeing which /dev node is assigned to /system. Then, manually remount the system partition with `mount -o remount,rw -t rfs /dev/block/st19 /system`; this must be done as root.
It does seem a bit odd that you are getting a permission denied error on /sdcard. Are you sure that /sdcard is mounted? You can verify the same way you check what /dev node holds you system partition. On my Vibrant, /sdcard is the mount point for /dev/block//vold/179:1 (yes, that is two slashes after block). So, the command to mount the internal SD card is `mount -o remount,rw -t vfat /dev/block//vold/179:1 /sdcard`.
Now those commands should ensure that you have both your system partition and SD card mounted as read-write. Now you can copy over the update.zip that contains ClockworkMod recovery to the root of your SD card (/sdcard) with `adb push drive:\path\to\recovery.zip /sdcard/update.zip`. I recommend specifying a destination filename for update.zip. Also, sometimes an adb push command requires the trailing / of a directory.
This last statement looks like either your system partition is not mounted, or that it does not have a shell installed. From an adb shell session, check the /system/bin directory and see if there is indeed a shell binary there (either sh itself, or sh linked to another shell such as bash). If there is no /system, then it means that your system partition is not mounted, and you can follow the steps I previously mentioned to mount the system partition.
Click to expand...
Click to collapse
I tried 'adb root' and then it said 'adbd cannot run as root in production builds'
By shell session do you mean 'adb shell'? No, I dont believe that works because I get 'adbd cannot run as root in production builds'
When you mean 'shell installed' you do I have it installed on the phone? If it isnt is there anyway I could do it now?
`adb push drive:\path\to\recovery.zip /sdcard/update.zip` didnt work and gave me 'c:\update.zip' to '/sdcard/update.zip': Permission denied
Can I flash /system via my pc onto my phone? or Use the external sdcard instead of the internal?
Dude, if your phone is stuck in a bootloop, you HAVE TO FLASH IT VIA ODIN. There's no other work-around.
RPGbig said:
I tried 'adb root' and then it said 'adbd cannot run as root in production builds'
By shell session do you mean 'adb shell'? No, I dont believe that works because I get 'adbd cannot run as root in production builds'
When you mean 'shell installed' you do I have it installed on the phone? If it isnt is there anyway I could do it now?
`adb push drive:\path\to\recovery.zip /sdcard/update.zip` didnt work and gave me 'c:\update.zip' to '/sdcard/update.zip': Permission denied
Can I flash /system via my pc onto my phone? or Use the external sdcard instead of the internal?
Click to expand...
Click to collapse
Why did you try `adb root`? I don't quite understand that.
A shell session would be `adb shell`, yes. On your computer's command line, invoke `adb shell`. You are now in a shell session. What does the prompt look like? Is it "#" or "$". If it is a hash, then you have root access via adb. If it is a dollar sign, then you do not have root access; try running `su` from within the shell session. If the prompt does not change to a hash, then you are stuck for the moment, because you do not have root access via adb, and therefore nearly all of the adb commands will not work.
By "shell installed" I was referring to a shell interpreter installed on your handset. bash is the most commonly installed Linux shell, and sh is usually just a pointer to bash. If your handset does not have either /system/bin/sh or /system/bin/bash (or anything similar), then you have an incomplete system, and it got messed up along the way with something you did.
But, since it seems that you cannot gain root access through adb, and therefore cannot (re)mount your partitions, you are basically limited in your options. All you can really do is put your phone in download mode, and use Odin to reflash a complete system (including a kernel image). I would also recommend that you use the repartition option in Odin to make sure that your partitions are reformatted and you are essentially left with a wiped and clean handest to start with.
(Lack of root access via adb has severely limited your options. You are basically left with Odin as your only avenue of recourse, unless you are willing to disassemble your device to get to the internal SD card.)
Have you opened yours? Is it an actual (micro) sdcard that can be taken out like the external one?
I typed 'adb root because typing 'adb' showed this
adb root - restarts the adbd daemon with root permissions
so I guess that was what you ment by root.
When I type 'adb shell' all it gave was - exec '/system/bin/sh' failed: No such file or directory (2) -
You need to stop trying to do it the hard way and just use Odin. If your phone is not being recognized then you need the correct drivers. Once installed, you should be back up and running within 5 minutes. Stop lollygagging and fix your phone already.

Cannot enable non-market apps on stock aria rom - please help

Let me first say that I have read every post I could find on this subject and tried them all with no success. I rooted my Aria using the Ubuntu Live CD so I could use Titanium backup and eventually try different roms. My phone is still using the stock rom. I then installed Titanium backup which reports "your system settings will prevent you from restoring applications. to correct this go to your phone's settings, then in "applications" and tick the "unknown sources" check box."
The unknown sources check box is of course not there because I have not been able to successfully run the code for allowing non-market apps.
From terminal in the Ubuntu Live CD with USB cable connected and set to charge only. I tried and got "remount failed: operation not permitted." at the adb remount step.
Linux Code:
sudo su
adb remount
adb pull /data/data/com.android.providers.settings/databases/settings.db settings.db
echo "update secure set value = 1 where name = 'install_non_market_apps';"|sqlite3 ./settings.db
adb push settings.db /data/data/com.android.providers.settings/databases/settings.db
adb reboot
I downloaded the android-sdk_r07 and extracted it to my C drive. From a Windows command prompt, I changed to the sdk\tools folder. Adb devices sees the phone but adb remount fails with "remount failed: operation not permitted."
Windows Code:
adb remount
adb pull /data/data/com.android.providers.settings/databases/settings.db settings.db
echo update secure set value = 1 where name = 'install_non_market_apps';|sqlite3 settings.db
adb push settings.db /data/data/com.android.providers.settings/databases/settings.db
I found a post from attn1 that I have not tried that said:
"Put your phone in recovery mode. Go to advanced>mount system and mount data. Follow steps in post #13 (using the windows or linux code above) in cmd screen and you'll be fine." I am not comfortable in trying this approach as there are not enough specific step details and I don't want brick my phone.
I would really appreciate the correct detailed steps to enable non-market apps using the supplied code either from Windows or the Ubuntu Live CD. Thank you in advance.
You are rooted, so boot into recovery and create a nandroid backup; if something goes wrong when pushing settings.db and you cannot boot, restore your nandroid backup. Then, as attn1 stated, perform the same steps you mention above, but while the phone is in recovery and you have mounted the system and data folders.
winsettr said:
You are rooted, so boot into recovery and create a nandroid backup; if something goes wrong when pushing settings.db and you cannot boot, restore your nandroid backup. Then, as attn1 stated, perform the same steps you mention above, but while the phone is in recovery and you have mounted the system and data folders.
Click to expand...
Click to collapse
Thank you winsettr for your post. It looks like running the commands from recovery did indeed work. Titanium backup no longer reports the "your system settings will prevent you from restoring applications. To correct this go to your phone's settings, then in "applications" error.
However, I expected to see the settings\applications unknown sources check box check box and it is not there. I guess I will have to try side-loading an app to confirm that it will work.
I think that gui option would be part of the rom, a part that AT&T has removed... So yeah, see if side- loading works now.
Sent from my Liberty using XDA App
FYI, I am indeed able to side load now from an .apk copied to the sd card. However, I am not able to install from an internet link. Trying to do so generates a "your phone is not authorized" error message.
Until you get a custom rom running, I wouldn't worry too much. Sounds like you can get any app you want (just download internet apps to sd then install). There may be an additional setting in settings.db but that's beyond my knowledge...
Sent from my Liberty using XDA App

Big issue.

So I was having the issue with the settings menu force closing after I rooted the device.
This morning I've done a factory data reset, gone to turn the tablet on, and I'm not getting "The application OLS (process com.sony.nfx.app.ols) has stopped unexpectedly. Please try again.
Can't access the device, tried another factory data reset, can't flash a firmware as I can't access the device.
Not very happy at all.
But any ideas please?
**I can get into the settings menu and when I press the home button is when I get the OLS force close, so I assume it's the home launcher, I did remove it when my device was working.....
I can't access device storage either, even when my device is on - or ADB, but I can access an SD Card through the boot menu.
Well factory reseting doesn't restore anything you deleted from system, but wipe anything else you installed.. so there's the big problem.
On my tab, I can force a boot loop by holding volume down when booting (hold vol down for what seems like an eternity/till you are satisfied that it is boot looping).
ADB seems to work here, so you could potentially push a different launcher apk and get it going that way.
Thanks for the response Dan,
What I can do is start the device, there's no launcher there, but inbetween the force closes I can get into the settings, there's no force closes when I'm in there.
I connect the USB, ADB Devices and it shows, I can pull from the /system but not push.
As soon as I type ADB Shell, then the commands, it tells me "error: device not found"
Exit out of ADB Shell, ADB Devices again, and it's there - but ADB Devices when inside ADB Shell shows nothing.
I've tried all of the OTA packages in the other thread and nothing - I'm at a bit of a loss, i doubt Sony would work with me on this one, so It looks like I've got £349 of paper weight. Any ideas on the ADB? At least then I could push a launcher in.
The issue clearly is becuase there's no launcher.
I remove the default launcher from the /system/app folder and install ADW, the factory reset obviously removed it, hence there's no launcher...
What if the APK for ADW was made into an update.zip?
Would it flash when I hold down power + volume+, Update System from zip?
bummer
Not really sure what can be done if you deleted them from the system and the reset does not reinstall them.
Perhaps someone who has rooted can send them to you, but not sure how that would work.
I'll get in touch with Sony tomorrow, now I know that this is my own fault, but under the warranty they are still abliged to fix it, I certainly won't be rooting it again, thats for sure.
I hope they will help me if I'm honest?
Did you have a look at if ADB works for you in the forced boot loop state I mentioned? It could possibly do some extras from there that you can't otherwise.
Also just try sending a third party launcher in so it's doesn't have to go to system, perhaps it will let you write the file then. And hopefully auto - detect it upon booting .
Tried it Dan, if I attempt ADB Install launcher.apk, it starts installation then;
[1] Killed pm install /data....
I'm getting permission denied in every ADB command when in the Boot Loop.
Thanks anyway - I've emailed them, and been totally honest about what I've done.
I could swear all day - I've fixed it, my tablets working again, what a bloody relief. Thanks ADB!
I tried to duplicate your problem with adb :-
Typed ADB Devices - reports attached device OK
Typed ADB Shell - prompt changes to $
Typed ls - shows root of tablet
Typed cd system - changed to system directory
Then ls again then cd app then ls again - shows all system apps
I then typed ADB devices again and lost the connection to the tablet
It would seem that on my tablet at least that typing ADB devices whilst within the ADB shell breaks the connection with the tablet
Thanks for testing it praed0r, I'm pleased to know that it's not just me that had that issue.
It may be of use to someone, but what I did was mount the /system partition as rw using busybox.
Code:
adb shell
su
busybox mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
From there I removed the app that kept forceclosing, in this case it was OLS (or something like that)
I then mounted the /data drive with;
Code:
busybox mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /data
Then using cp instead of ADB Push,
Code:
cp /sdcard2/golauncher.apk /system/app/golauncher.apk
Rebooted the device and it all worked fine, GoLauncher booted as my default launcher.
For some reason it didn't like adb push, and would give me permission errors, but mounting as busybox fixed it all....
I changed the build.prop so that it would system update, it indeed does, but all STOCK apps (Sony apps) force close, it could be becuase of the framework.jar from the other thread, so I'll try and source one from a kind individual. Then I'll do the update and my system will be OK.
I'd consider myself very lucky this time, lesson learnt not to tweak with things.
I'll stick to the build.prop/local.prop tweaks for now
Any idea why the system apps aren't working, i've retraced my steps to before it happened, the only notable thing that would have an affect was changing the framework.jar?

Root access in ADB shell

Hey guys I am struggling pretty hard right now. Currently my phone is locked out, I can't get past the lock screen.. something happened to the code I use, not sure. Anyway, I've read up online and people are saying that I could "rm *.key" and that should give me back access to my phone. So I'm in ADB shell trying to rm *.key but I can't get permission. My phone is previously rooted, and when I type su my phone light sup but because I can't get past the lockscreen I can't grant access.
Any suggestions on what I can do?
Have you an unlocked bootloader and TWRP installed?
Use: - Advanced - File Manager
Located the the *.key files your trying to delete and delete them.
Additional options: - [Android][Guide]Hacking And Bypassing Android Password/Pattern/Face/PI
corkiejp said:
Have you an unlocked bootloader and TWRP installed?
Use: - Advanced - File Manager
Located the the *.key files your trying to delete and delete them.
Additional options: - [Android][Guide]Hacking And Bypassing Android Password/Pattern/Face/PI
Click to expand...
Click to collapse
Can't mount /data/ and therefore can't access /data/system/*.key
What's the device name wherof you talking about?This could be occurred related to a malware previously installed on the device.You can perform a clean flash
turnsteph said:
Hey guys I am struggling pretty hard right now. Currently my phone is locked out, I can't get past the lock screen.. something happened to the code I use, not sure. Anyway, I've read up online and people are saying that I could "rm *.key" and that should give me back access to my phone. So I'm in ADB shell trying to rm *.key but I can't get permission. My phone is previously rooted, and when I type su my phone light sup but because I can't get past the lockscreen I can't grant access.
Any suggestions on what I can do?
Click to expand...
Click to collapse

Help performing data recovery after self-inflicted wipe

Greetings all,
This is a fully should-have-had-more-coffee-before-attempting scenario, but hoping there's still a way I can get data back.
*Backstory*
Have a Pixel 2 XL. Decided to try out Android P beta through the opt-in. Used it for a while, decided there were too many bugs that affected my daily usage, opted-out of Beta. What I didn't realize was that after downgrading back to Android O, the phone would perform a factory wipe on the /userdata folder. There's a specific subfolder on that partition that I'm hoping I can do a data recovery on.
*The Story so Far*
After spending a day googling and coming up to multiple XDA posts & few blog entries about data recovery on android, I have done the following.
- gain root devices using Magisk to flash patched boot image
- found that the /userdata is located at /dev/block/sda13 symlinked from /dev/block/platform/soc/.../by-name/userdata
- see that the most probable way of getting files back is to pull the entire partition over as a raw file, then use TestDisk (or qPhotoRec) to try and perform a data recover on the file as you would a normal drive, since there are few, if any, tools that will run recovery directly on the device.
*The Problem*
The research led me to attempting to run the following command as a binary safe transfer of the partition.
Code:
adb exec-out "su -c 'cat /dev/block/sda13'" > userdata.raw
However when I run that, while it does start creating the userdata.raw file on my local machine, it gets to ~4gb, then the file just stops getting any larger and I've let it sit for over an hour. The command in adb never times out or returns to a prompt, it's like it just stops transferring the output from adb into the file. I know the size of the userdata partition is ~65gb from going into shell and looking at it.
I've also tried various chmod hacks of temp setting 777 on the file just to see if I can do an adb pull on it, however nothing I'ved tried so far yields anything other than a Permission Denied when I try that.
Does anyone have any ideas on how I can get a complete transfer of the userdata partition over to my local drive so I can run data recovery on it?

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