Yes, just boot your phone and type them in the terminal.
As you can see from the commands, it saves the 2 images on your internal SD card.
[SOLVED][Guide] How to backup EFS + Modemfs folders
- Thread starter YMatrix
- Start date
Yes, just boot your phone and type them in the terminal.
As you can see from the commands, it saves the 2 images on your internal SD card.
Yeah, you can do just that. Just type in terminal emulator while it's booted.
Sent from my GT-I9070 using xda app-developers app
@YMatrix @KINGbabasula Ok, so I tried to be a responsible person and backup this files..... I don't know what the hell happened, I used this commands in terminal emulator:
$ su
# dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img
# dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img
Files were created without problem, but then i noticed that mi 3g connectivity was glitchy, and then realized that my Modemfs folder is empty: 0 files, 0 bytes. My backups are the correct size (10 and 16mb).
Tried to restore the modemfs image, but the folder is still empty. I DO NOT RECOMMEND THIS METHOD, just copy the folders as they are from a file explorer and be done with it..... i wish i had done this
EFS folder doesn't seem to have the same problem, don't know why. Does anyone know if i can get a modemfs "transplant" from another user with the same firmware ?? (my firmware is VSLP9 (Movistar Argentina firmware).
Just to be clear, 3G works sometimes, but most of the time (especially when switching over from wifi) i don't get any kind of data signal as if data mode was off...
$ su
# dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img
# dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img
Files were created without problem, but then i noticed that mi 3g connectivity was glitchy, and then realized that my Modemfs folder is empty: 0 files, 0 bytes. My backups are the correct size (10 and 16mb).
Tried to restore the modemfs image, but the folder is still empty. I DO NOT RECOMMEND THIS METHOD, just copy the folders as they are from a file explorer and be done with it..... i wish i had done this
EFS folder doesn't seem to have the same problem, don't know why. Does anyone know if i can get a modemfs "transplant" from another user with the same firmware ?? (my firmware is VSLP9 (Movistar Argentina firmware).
Just to be clear, 3G works sometimes, but most of the time (especially when switching over from wifi) i don't get any kind of data signal as if data mode was off...
@YMatrix @KINGbabasula Ok, so I tried to be a responsible person and backup this files..... I don't know what the hell happened, I used this commands in terminal emulator:
$ su
# dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img
# dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img
Files were created without problem, but then i noticed that mi 3g connectivity was glitchy, and then realized that my Modemfs folder is empty: 0 files, 0 bytes. My backups are the correct size (10 and 16mb).
Tried to restore the modemfs image, but the folder is still empty. I DO NOT RECOMMEND THIS METHOD, just copy the folders as they are from a file explorer and be done with it..... i wish i had done this
EFS folder doesn't seem to have the same problem, don't know why. Does anyone know if i can get a modemfs "transplant" from another user with the same firmware ?? (my firmware is VSLP9 (Movistar Argentina firmware).
Just to be clear, 3G works sometimes, but most of the time (especially when switching over from wifi) i don't get any kind of data signal as if data mode was off...
First of all the problem and your assumption it is connected to the backup you created is INCORRECT.
The 2 commands you quoted are a copy raw data process, thus what was there during the copy will be in the backup file.
I don't know why your modemfs is empty, and whether it is connected to your problem (could be a rom bug, communication problem etc.)
More over, the "copy+paste" process you advised should also work, BUT the dd command makes sure you backup the data (including time stamps and permissions) as is, making your backup exact, so your wishing of copying the folders via root explorer wouldn't have changed a thing.
modemfs is not empty - recheck
I did the same and at first sight when I came to check the modemfs folder by ES File Explorer I was stunned to see it empty. But I changed settings of ES File Explorer - enabled hidden files, root explorer and went for properties of the folder - there are 68 files, 6 folders. You can also check from terminal by typing the following command:
$su
#cd /modemfs
#ls -la
Before doing anything else I would advise you to check in my way.
@YMatrix @KINGbabasula Ok, so I tried to be a responsible person and backup this files..... I don't know what the hell happened, I used this commands in terminal emulator:
$ su
# dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img
# dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img
Files were created without problem, but then i noticed that mi 3g connectivity was glitchy, and then realized that my Modemfs folder is empty: 0 files, 0 bytes. My backups are the correct size (10 and 16mb).
Tried to restore the modemfs image, but the folder is still empty. I DO NOT RECOMMEND THIS METHOD, just copy the folders as they are from a file explorer and be done with it..... i wish i had done this
EFS folder doesn't seem to have the same problem, don't know why. Does anyone know if i can get a modemfs "transplant" from another user with the same firmware ?? (my firmware is VSLP9 (Movistar Argentina firmware).
Just to be clear, 3G works sometimes, but most of the time (especially when switching over from wifi) i don't get any kind of data signal as if data mode was off...
I did the same and at first sight when I came to check the modemfs folder by ES File Explorer I was stunned to see it empty. But I changed settings of ES File Explorer - enabled hidden files, root explorer and went for properties of the folder - there are 68 files, 6 folders. You can also check from terminal by typing the following command:
$su
#cd /modemfs
#ls -la
Before doing anything else I would advise you to check in my way.
guys plz the correct commands for using it in terminal emu ,
bcuz when i use adb shell :
bcuz when i use adb shell :
what i did wrong ?
On the first command you forgot the .img file extension.
On the second command you added a space character after the "/"
Sent from my GT-I9070 using Tapatalk 4
You did the backup commands correctly. The problems you had were with the syntax of the adb pull commands
Sent from my GT-I9070 using Tapatalk 4
where exactly ? i just used the commands on first post
so i copied and pasted it .. if it wrong edit it .
---------- Post added at 08:55 PM ---------- Previous post was at 08:48 PM ----------
Sorry dude , my english its not so well so please can u just QOUTE the command i should use i'll backup again , and i really dont know how i use PULL commands
i want detailed BACKUP and RESTORE commands pls
---------- Post added at 09:08 PM ---------- Previous post was at 08:55 PM ----------
@YMatrix is it like this ? i think u need to edit the command in first post because its without ".img" in pull command
where exactly ? i just used the commands on first post
so i copied and pasted it .. if it wrong edit it .
---------- Post added at 08:55 PM ---------- Previous post was at 08:48 PM ----------
Sorry dude , my english its not so well so please can u just QOUTE the command i should use i'll backup again , and i really dont know how i use PULL commands
i want detailed BACKUP and RESTORE commands pls
---------- Post added at 09:08 PM ---------- Previous post was at 08:55 PM ----------
@YMatrix is it like this ? i think u need to edit the command in first post because its without ".img" in pull command
Do not type # and $. It is there already (show do you have root access of not).
Backup Process:
Code:
adb shell
su
dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img
dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img
exit
exit
adb pull /sdcard/efs_backup.img efs_backup.img
adb pull /sdcard/modemfs_backup.img modemfs_backup.imgRestore Backup Process:
Code:
adb push efs_backup /sdcard/efs_backup.img
adb push modemfs_backup /sdcard/modemfs_backup.img
adb shell
su
d if=/sdcard/efs_backup of=/dev/block/mmcblk0p7
dd if=/sdcard/modemfs_backup of=/dev/block/mmcblk0p2
exit
exitadb pull /sdcard/efs_backup efs_backup
adb pull /sdcard/modemfs_backup modemfs_backup
This is missing .img and path where to pull fille. Files will be in root of your sd card - use copy/paste like you would do for image, song or whatever.
Last edited:
@iiD4x The code on the OP was missing .img just like @shut_down said.
I fixed the OP code so it would be "Copy + Paste"-able to a Windows Command window (without the "#,$" which messed your script running.
The adb pull / push commands are just if you don't want to copy / paste the files via explorer window.
If you need any more help, feel free to ask.
Good luck!
I fixed the OP code so it would be "Copy + Paste"-able to a Windows Command window (without the "#,$" which messed your script running.
The adb pull / push commands are just if you don't want to copy / paste the files via explorer window.
If you need any more help, feel free to ask.
Good luck!
I know that i dont neet to type #,$
I just copied from cmd after i do it
.
The problem is in PAC 4.3 when I do restore nothing change ..
Sent from my GT-I9070 using xda app-developers app
:silly: You should have said you're on CM Roms.
This process of backup and recovery is when you totally wipe your IMEI. On CM Roms, you don't wipe your IMEI but get a "global" one.
I am not sure why this happens (maybe @shut_down has more info on that), but a good way to work around it is by, reflashing stock, making sure your IMEI is back and then flash the CM Rom.
i was on Stock , and flashed CM .
no 3G
IMEI Known
IMEI SV 01
Baseband Known
but 3g not working , why i dont know ..~!
so i tried the EFS restore and modemfs
still not workin
any suggestions
P.S : all CM Roms same problem , i tried SamiOS and 3g working also on stock .
Last edited:
Did you do factory reset? Some people do not have network unless they do factory reset after changing ROM.
I do not know what can cause your problem. Check if it is 2g only checked in network settings. Settings>More settings.
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7Hello!
So I recently stumbled upon some information that while flashing all kinds of Roms, you might lose your IMEI, thus being left over with a nice paper weight.
To my understanding this information is stored in the EFS folder (though according to this thread it is actually stored in modemfs).
I googled around and saw many options: PC software, terminal commands, apps etc.
Since each phone utilizes this option in different ways, which would be a good way to backup these folders in case of emergency on the S Advance?
Thanks!
SOLUTION:
These are the commands from the ADB shell, but can also be used within the terminal.
Backup Process:
Code:adb shell su dd if=/dev/block/mmcblk0p7 of=/sdcard/efs_backup.img dd if=/dev/block/mmcblk0p2 of=/sdcard/modemfs_backup.img exit exit adb pull /sdcard/efs_backup.img efs_backup.img adb pull /sdcard/modemfs_backup.img modemfs_backup.img
Restore Backup Process:
Code:adb push efs_backup.img /sdcard/efs_backup.img adb push modemfs_backup.img /sdcard/modemfs_backup.img adb shell su dd if=/sdcard/efs_backup.img of=/dev/block/mmcblk0p7 dd if=/sdcard/modemfs_backup.img of=/dev/block/mmcblk0p2 exit exit
Thanks to @mr.harsh and @KINGbabasula for help and KINGbabasula for making the script!
Please note that the restore commands haven't been tested out, but theoretically its supposed to work.
If someone has made a backup and wiped his EFS folder, he wont mind testing it out3
in the terminal type:
Code:su cp /dev/block/mmcblk0p7 /sdcard/efs_backup cp /dev/block/mmcblk0p2 /sdcard/modemfs_backup
check that efs_backup is 10MB and modemfs_backup is 16MB.And this is for JB.I don't know about GB but most probably they'll be same...2
Copying the folders in theory should also work, its just safer to back them up using the DD command since you get the original structure, permissions, dates etc. of the partitions.
Thus when restoring its as if you never tampered with them, while the "copy folder" method doesn't give you the original data structure.
Again, it shouldn't make a difference (in theory), but we always like to be closest to the original2
I am surprised that your modemfs folder is empty
As for the folder size vs. backup size, this is because that these folders are actually partitions on the phone. when backing up using DD / CP commands you are backing up the whole partition (even the "empty" bits of data), which is why you get the according sizes (these are the partition's sizes).
