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(Q) Efs backup

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By thay, Senior Member on 5th January 2012, 10:36 AM
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Is there any valid reason for backup EFS in galaxy nexus ?
In other samsung devices efs is stored in the / dir but in this device is different.
 
 
5th January 2012, 01:37 PM |#2  
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Its also good to have backups, incase something gets corrupted its nice to have it.

http://forum.xda-developers.com/show....php?t=1352371
Last edited by Goat_For_Sale; 5th January 2012 at 01:51 PM.
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5th January 2012, 06:36 PM |#3  
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Quote:
Originally Posted by Goat_For_Sale

Its also good to have backups, incase something gets corrupted its nice to have it.

http://forum.xda-developers.com/show....php?t=1352371

Test but what is the correct way to backup and to restore ?
5th January 2012, 08:51 PM |#4  
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The image backup would probably serve you best. Rooted, ADB, and busybox installed:

Backup
Code:
adb shell
su
busybox dd if=/dev/block/platform/omap/omap_hsmmc.0/by-name/efs of=/data/media/my_efs_backup.img
Restore
Code:
adb shell
su
busybox dd if=/data/media/my_efs_backup.img of=/dev/block/platform/omap/omap_hsmmc.0/by-name/efs
I should mention that this puts an image backup at the root of the internal sd. You will want to copy this off and save it somewhere safe, preferrably multiple places.
Last edited by silow; 5th January 2012 at 08:53 PM.
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5th January 2012, 09:15 PM |#5  
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Quote:
Originally Posted by silow

The image backup would probably serve you best. Rooted, ADB, and busybox installed:

Backup

Code:
adb shell
su
busybox dd if=/dev/block/platform/omap/omap_hsmmc.0/by-name/efs of=/data/media/my_efs_backup.img
Restore
Code:
adb shell
su
busybox dd if=/data/media/my_efs_backup.img of=/dev/block/platform/omap/omap_hsmmc.0/by-name/efs
I should mention that this puts an image backup at the root of the internal sd. You will want to copy this off and save it somewhere safe, preferrably multiple places.

Very well fine thank's
This info is important and should be highlighted for prevent damage of imei after a bad flash
7th February 2012, 04:18 AM |#6  
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Is there a way to backup efs without busybox installed?
7th February 2012, 06:30 AM |#7  
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Quote:
Originally Posted by Keneez

Is there a way to backup efs without busybox installed?

Use this instead to backup efs and radio:

Code:
adb shell
su
for i in efs radio
do
dd if=/dev/block/platform/omap/omap_hsmmc.0/by-name/${i} of=/sdcard/${i}.img &
done
9th March 2012, 04:55 PM |#8  
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Unhappy
Quote:
Originally Posted by ArmanUV

Use this instead to backup efs and radio:

Code:
adb shell
su
for i in efs radio
do
dd if=/dev/block/platform/omap/omap_hsmmc.0/by-name/${i} of=/sdcard/${i}.img &
done

Do you have a GSM Nexus ? if so, can u upload the backup image ! i have a broken efs partition and i want to fix it
10th March 2012, 03:15 AM |#9  
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btw is it possible to fix Corrupted efs with another one's working efs ?
mudferret
10th March 2012, 03:38 AM |#10  
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Quote:
Originally Posted by M7amad90

btw is it possible to fix Corrupted efs with another one's working efs ?

Not legal (most likely) since you'd have a duplicate of their IMEI.
10th March 2012, 06:53 AM |#11  
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Quote:
Originally Posted by mudferret

Not legal (most likely) since you'd have a duplicate of their IMEI.

Ok , If i could compare them to each other ! i mean mine and the other EFS files to change the IMEI ti mine in hex editor , willl this work?

If not , what should i do ?

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