Backup efs file

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Deep Nox

Deep Nox

Senior Member
Aug 6, 2013
206
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How do i make a backup efs file for a gtab sch-i800 (cdma)? I have the app efs pro 1.9 and 2.0, but no success. The app does not have the tab bin file. (?). Any other ways to make a backup efs file?
Thanks.
W.

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priyana

Senior Member
Jul 21, 2007
3,172
1,278
you should be able to copy the /efs folder manually.
For P1000, when we flash CM rom, it backs up efs to sdcard ( /backups I think).
The oldest copy usually the most reliable (if before flashing CM you have a good IMEI)
 
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Deep Nox

Deep Nox

Senior Member
Aug 6, 2013
206
28
priyana said:
you should be able to copy the /efs folder manually.
For P1000, when we flash CM rom, it backs up efs to sdcard ( /backups I think).
The oldest copy usually the most reliable (if before flashing CM you have a good IMEI)
Click to expand...
Click to collapse

Hi priyana,
Seen alot of your posts! You give really good advice. Especially--this is the original gtab forum!:D
Anyway, how would i make a backup manually? I will look around in the other tab that's got the CM11 p1c rom to see if i can find it. I just hope terenceng will be able to fix the data bug in the cm build. I woyld love to activate the tab to 3g. I have 3 of these 'ole tabs around, so i don't have a problem finding the file. I just want to transfer it.
W.
Sent from my SCH-I800 using xda app-developers app
Update-- i copied the efs file. Now, how do i install it? Just copy it again or?
 
Last edited:
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priyana

Senior Member
Jul 21, 2007
3,172
1,278
Yes. Just keep in safe place. Note down the permissions too.
Although honestly I never restore efs before.
Usually the best way to restore it is by restocking to GB. That was the case of p1. I think it should be the same as p1c.


Sent from my GT-P1000 using xda app-developers app
 
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Deep Nox

Deep Nox

Senior Member
Aug 6, 2013
206
28
priyana said:
Yes. Just keep in safe place. Note down the permissions too.
Although honestly I never restore efs before.
Usually the best way to restore it is by restocking to GB. That was the case of p1. I think it should be the same as p1c.


Sent from my GT-P1000 using xda app-developers app
Click to expand...
Click to collapse

What are the permissions i need to note? Is it the rx dx x? Anyway, i got the file saved to the sd card on my tab with galaxy cubed. Now i want to move the sd card to my other tab with kitkat to copy the info there. Then all i have to do is update the imeid (meid for us cdma people) to the correct number. Finally, wait for terenceng to fix the data on his build. Hopefully i will have a FULLY working custom rom.:D

Sent from my SCH-I800 using xda app-developers app
 
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priyana

Senior Member
Jul 21, 2007
3,172
1,278
Permission of each individual folders and files.
Not sure if you can move between tabs.
It is an "encrypted file system" and I am sure it is encrypted from the hardware info.
That is why flashing a stock ROM can regenerate the content.
But anyway, hope it works.

Sent from my GT-P1000 using xda app-developers app
 
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Deep Nox

Deep Nox

Senior Member
Aug 6, 2013
206
28
priyana said:
Permission of each individual folders and files.
Not sure if you can move between tabs.
It is an "encrypted file system" and I am sure it is encrypted from the hardware info.
That is why flashing a stock ROM can regenerate the content.
But anyway, hope it works.

Sent from my GT-P1000 using xda app-developers app
Click to expand...
Click to collapse

When i go to the efs file using root browser, the file does not show any files or folders inside. So, how would i get the permissions?
Or, what would i need to return the tab to stock? I have a stock gb rom with root, heimdall and odin ready to go. Would i need a pit file of some sort? And, what about the different memory systems rfs,ext4, and mtd? Any problems here?

Sent from my SCH-I800 using xda app-developers app
 
P

priyana

Senior Member
Jul 21, 2007
3,172
1,278
Can't say about p1c. Wonder if anyone can chime in.

Look at my /efs number of files

1|u0_a29@GT-P1000:/ $ su
root@GT-P1000:/ # find /efs
find /efs
/efs
/efs/nv_data.bin
/efs/nv_data.bin.md5
/efs/.nv_state
/efs/.nv_data.bak.md5
/efs/updated_filesystem
/efs/.android
/efs/nv.log
/efs/.nv_data.bak
/efs/imei
/efs/imei/mps_code.dat
/efs/imei/.nvmac.info
/efs/imei/bt.txt
/efs/lost+found
root@GT-P1000:/ #


Restock with pit needed to get back to bml+rfs (partition and filesystem)

When you flash cm ROM from custom recovery, it will check and convert to mtd partition and ext4 fs
So you don't worry about conversion.

Sent from my GT-P1000 using xda app-developers app
 
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Deep Nox

Deep Nox

Senior Member
Aug 6, 2013
206
28
priyana said:
Can't say about p1c. Wonder if anyone can chime in.

Look at my /efs number of files

1|u0_a29@GT-P1000:/ $ su
root@GT-P1000:/ # find /efs
find /efs
/efs
/efs/nv_data.bin
/efs/nv_data.bin.md5
/efs/.nv_state
/efs/.nv_data.bak.md5
/efs/updated_filesystem
/efs/.android
/efs/nv.log
/efs/.nv_data.bak
/efs/imei
/efs/imei/mps_code.dat
/efs/imei/.nvmac.info
/efs/imei/bt.txt
/efs/lost+found
root@GT-P1000:/ #


Restock with pit needed to get back to bml+rfs (partition and filesystem)

When you flash cm ROM from custom recovery, it will check and convert to mtd partition and ext4 fs
So you don't worry about conversion.

Sent from my GT-P1000 using xda app-developers app
Click to expand...
Click to collapse

When i open the efs file using root explorer, there is nothing there. ? . Any way, i've been reading up on restocking my 'ole gtab. I think i'm about to have a flashback!:p
I just flashed terenceng newest update. Cameras work, but video fc's evertime. App2 sd is now good. The last major fix is data. This could be some time in comming due to terenceng computer hard disk crash. So, i've got time.
Sent from my SCH-I800 using xda app-developers app
 
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  • 1
    P
    priyana
    you should be able to copy the /efs folder manually.
    For P1000, when we flash CM rom, it backs up efs to sdcard ( /backups I think).
    The oldest copy usually the most reliable (if before flashing CM you have a good IMEI)
    View
    1
    P
    priyana
    Yes. Just keep in safe place. Note down the permissions too.
    Although honestly I never restore efs before.
    Usually the best way to restore it is by restocking to GB. That was the case of p1. I think it should be the same as p1c.


    Sent from my GT-P1000 using xda app-developers app
    View
    1
    P
    priyana
    Permission of each individual folders and files.
    Not sure if you can move between tabs.
    It is an "encrypted file system" and I am sure it is encrypted from the hardware info.
    That is why flashing a stock ROM can regenerate the content.
    But anyway, hope it works.

    Sent from my GT-P1000 using xda app-developers app
    View
    1
    P
    priyana
    Can't say about p1c. Wonder if anyone can chime in.

    Look at my /efs number of files

    1|u0_a29@GT-P1000:/ $ su
    root@GT-P1000:/ # find /efs
    find /efs
    /efs
    /efs/nv_data.bin
    /efs/nv_data.bin.md5
    /efs/.nv_state
    /efs/.nv_data.bak.md5
    /efs/updated_filesystem
    /efs/.android
    /efs/nv.log
    /efs/.nv_data.bak
    /efs/imei
    /efs/imei/mps_code.dat
    /efs/imei/.nvmac.info
    /efs/imei/bt.txt
    /efs/lost+found
    root@GT-P1000:/ #


    Restock with pit needed to get back to bml+rfs (partition and filesystem)

    When you flash cm ROM from custom recovery, it will check and convert to mtd partition and ext4 fs
    So you don't worry about conversion.

    Sent from my GT-P1000 using xda app-developers app
    View

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