[Q] EFS Partition - Nexus 6 Q&A, Help & Troubleshooting

Will we need to backup are EFS partition like the N5?

dirtbikerr450 said:
Will we need to backup are EFS partition like the N5?
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I'd say yes, but it's personal preference really. If you'd happen to lose your EFS, then you're screwed because it contains your IMEI, MAC Address, Wifi MAC Address, etc...
If you flash a lot of ROMs I would say yes, but if you flash zero ROMs or very few, then I would say it's not totally necessary. It only takes one bad flash to ruin your EFS.
No one replied so I figured, why not?

StrifeSoldierVII said:
I'd say yes, but it's personal preference really. If you'd happen to lose your EFS, then you're screwed because it contains your IMEI, MAC Address, Wifi MAC Address, etc...
If you flash a lot of ROMs I would say yes, but if you flash zero ROMs or very few, then I would say it's not totally necessary. It only takes one bad flash to ruin your EFS.
No one replied so I figured, why not?
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How does one go about backing up that partition?

elevatorguy said:
How does one go about backing up that partition?
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A custom recovery like TWRP.

mwalt2 said:
A custom recovery like TWRP.
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OK thanks. Would assume it's somewhere in an advanced setting somewhere? Don't remember seeing it in the regular backup part

elevatorguy said:
OK thanks. Would assume it's somewhere in an advanced setting somewhere? Don't remember seeing it in the regular backup part
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Just do a regular Nandroid backup in recovery via TWRP and there is a check box for the EFS partition. Check it along with anything else you might want to back up at the time. Make sure you are on the latest TWRP version, otherwise you may not have this option.

StrifeSoldierVII said:
Just do a regular Nandroid backup in recovery via TWRP and there is a check box for the EFS partition. Check it along with anything else you might want to back up at the time. Make sure you are on the latest TWRP version, otherwise you may not have this option.
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Thanks for the education. Will back it up now ?

elevatorguy said:
Thanks for the education. Will back it up now ?
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Not a problem. Sucks that you didn't get an answer until now though.

StrifeSoldierVII said:
Not a problem. Sucks that you didn't get an answer until now though.
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I wasn't the one who originally asked the question I just saw something about needing to backup something. I'm kinda paranoid about backing things up. Few more things to ask. Do you back EFS up with every nandroid and just restore it with everything else, or do you keep a copy of just the EFS itself and restore it separately if something messes up?

elevatorguy said:
I wasn't the one who originally asked the question I just saw something about needing to backup something. I'm kinda paranoid about backing things up. Few more things to ask. Do you back EFS up with every nandroid and just restore it with everything else, or do you keep a copy of just the EFS itself and restore it separately if something messes up?
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I do a one time back of of just the EFS for each major android update, then erase the older version.
Like right now I have the efs backup for 5.0.2. When 5.1 comes to play I will back that up and then delete the 5.0.2. Just my preference

the_rooter said:
I do a one time back of of just the EFS for each major android update, then erase the older version.
Like right now I have the efs backup for 5.0.2. When 5.1 comes to play I will back that up and then delete the 5.0.2. Just my preference
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One more question. Can you make a backup of just the EFS partition and restore just that partition or do you have to restore a complete nandroid of the whole system? Thanks I'm sure this is all basic stuff to you but I seem to learn something new every day.

elevatorguy said:
One more question. Can you make a backup of just the EFS partition and restore just that partition or do you have to restore a complete nandroid of the whole system? Thanks I'm sure this is all basic stuff to you but I seem to learn something new every day.
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I do just do the efs partition

the_rooter said:
I do just do the efs partition
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OK thanks. I'll make a copy of just that. Guess that means you can just restore that alone.

Hi everyone! I am a newby here. I just want the Efs backup from TWRP of 6.0 Marshmallow
Please anyone upload it. Thanks.

I'm sorry, but you can't use someone else's.
Sent from my Nexus 6 running cyosp using Tapatalk

I'm having some problems with wifi/bluetooth mac address and want to try to format efs partition and then restore it
already have an efs backup made with TWRP but couldn't find the option to format that partition in order to fix any possible FS error.
Did you know how?

Related

[Q] How Backup-TA works ? is it supposed to be just 177kb ?

Hi All,
Totally new to the site.. was looking around for an answer but no much luck.
So question is how does backup ta works. I rooted the phone, and used the tool and now it has a backup. which is only 177kb
And does this mean that, later if i decide to go back to the stock rom, I can just recover from this backup ?
Thanks heaps for your help
Pavi:silly:
ounds like you backed up the cache only..?
What backup tool you use?
CM recovery or TWRP?
this
shoomacca said:
ounds like you backed up the cache only..?
What backup tool you use?
CM recovery or TWRP?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2292598
Compressed it can be 177KB, but that can be different per backup since the actual content isn't static. Extract the ZIP and check the size of TA.img, it should be 2MB (2048KB) round. Next time you better ask it in the Backup TA thread. Only read this one by coincidence .
yes!!
DevShaft said:
Compressed it can be 177KB, but that can be different per backup since the actual content isn't static. Extract the ZIP and check the size of TA.img, it should be 2MB (2048KB) round. Next time you better ask it in the Backup TA thread. Only read this one by coincidence .
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Hi,
I did try, but I cant actually reply to threads... Said i need at least 5posts to do so ?
and thank, yeah its 2mb so does it mean that i can go back to my original anytime ? if i decide to flash ?
thanks
Pavi:cyclops:
pavith said:
Hi,
I did try, but I cant actually reply to threads... Said i need at least 5posts to do so ?
and thank, yeah its 2mb so does it mean that i can go back to my original anytime ? if i decide to flash ?
thanks
Pavi:cyclops:
Click to expand...
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Yes.
See you in development soon .

Nandroid Backup Tim

Hi do you have a nandroid backup of HTC one Tim Italy with cid TIM-401,i don't find it anywhere!
mago988 said:
Hi do you have a nandroid backup of HTC one Tim Italy with cid TIM-401,i don't find it anywhere!
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Thats because people dont post nandroid backups as they contain personal information. Your best bet would be to look for a stock RUU for your device.
zelendel said:
Thats because people dont post nandroid backups as they contain personal information. Your best bet would be to look for a stock RUU for your device.
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I hope someone can help me because there are not any ruu
mago988 said:
I hope someone can help me because there are not any ruu
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There should be one on the HTC site. They normally keep a RUU for each model.
A nandroid from someone elses device will cause you more issues then anything as it contains Device files that are unique to each device like IMEI and others.
zelendel said:
There should be one on the HTC site. They normally keep a RUU for each model.
A nandroid from someone elses device will cause you more issues then anything as it contains Device files that are unique to each device like IMEI and others.
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Click to collapse
Not exactly true. It's perfectly safe and acceptable to share a nandroid of /system and /boot partitions, they don't contain any user specific data and can be useful for restoring the system in the absence of an RUU.
cschmitt said:
Not exactly true. It's perfectly safe and acceptable to share a nandroid of /system and /boot partitions, they don't contain any user specific data and can be useful for restoring the system in the absence of an RUU.
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Not sure how safe that would be when the system partition contains the Efs folder which controls the IMEI.
I have not used nandroid in a long time so I might have to look into how the recoveries handle these.
Bat cave One
zelendel said:
Not sure how safe that would be when the system partition contains the Efs folder which controls the IMEI.
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HTC One doesn't have an /efs partition, but do recall that on Samsung devices.
Even so, it's a mount point to a separate partition so it's not backed up with the /system partition. Check cat /proc/mounts to be certain.

How to back up my factory ROM?

Just got a new unit and would like to make a full backup of the factory ROM before proceeding to try out different ROMs. I did find an old thread from 2011 [HOW-TO]Create Custom ODIN Images for Backup/Restore but I'm not entirely sure if this is still accurate advice.
Also, it says that the device needs to be rooted in order to make the backups. My understanding is that if I root the system it will be detected by the system and OTA updating will then be disabled, which is not what I want. So my second question is: Is it really necessary to root and if so what is the best temporary method?
Aethera said:
Just got a new unit and would like to make a full backup of the factory ROM before proceeding to try out different ROMs. I did find an old thread from 2011 [HOW-TO]Create Custom ODIN Images for Backup/Restore but I'm not entirely sure if this is still accurate advice.
Also, it says that the device needs to be rooted in order to make the backups. My understanding is that if I root the system it will be detected by the system and OTA updating will then be disabled, which is not what I want. So my second question is: Is it really necessary to root and if so what is the best temporary method?
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ODIN flash TWRP then backup your stock ROM.
ShrekOpher said:
ODIN flash TWRP then backup your stock ROM.
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Thanks that what I ended up doing because it was definitely easiest.
Aethera said:
Just got a new unit and would like to make a full backup of the factory ROM before proceeding to try out different ROMs. I did find an old thread from 2011 [HOW-TO]Create Custom ODIN Images for Backup/Restore but I'm not entirely sure if this is still accurate advice.
Also, it says that the device needs to be rooted in order to make the backups. My understanding is that if I root the system it will be detected by the system and OTA updating will then be disabled, which is not what I want. So my second question is: Is it really necessary to root and if so what is the best temporary method?
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Small piece of advice my friend, be sure to include EFS in the backup to be on the safe side, also I suggest making a copy on a external SD or transferring to a PC
Why efs?
glm0025 said:
Small piece of advice my friend, be sure to include EFS in the backup to be on the safe side, also I suggest making a copy on a external SD or transferring to a PC
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According to TWRP they say:
Some devices have “special partitions” like WiMAX, pds, efs, etc. These partitions almost never need to be included in a normal backup.
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I already did one restore from my backup which had not included efs and it worked ok. What exactly is efs and why would we need it?
Aethera said:
According to TWRP they say:
I already did one restore from my backup which had not included efs and it worked ok. What exactly is efs and why would we need it?
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Click to collapse
The EFS folder contains important information from the phone, like the IMEI for example, and if it gets erased by error it may affect your ability to successfully connect to a provider. Backups in TWRP will give you the option to backup important partitions one of those is the EFS folder, alternatively you may also use an application to make a backup (requires root) like EFS Manager(IMEI)-Note4 on the play store.

Need the data/data/com.android.nfc folder, sub folder, contents

xx
toastgodsupreme said:
Did a stupid thing, removed NFC via titanium backup. Restore borks it, probably doesn't fix SE status, or owner, or permissions, or SOMETHING. Or the symbolic link lib in the sub directory is broken upon restore. Don't know.
So how do I restore just this folder and it's contents to how it should be, symlinks, permissions, ownership, etc and all?
Lollipop 5.1.1
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Fastboot flash the system.img.
cam30era said:
Fastboot flash the system.img.
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probably be your safest course of action. Might as well get the newest marshmallow one while you're at it. That data folder should rebuild itself when you get the system app properly reinstalled.
If you do upgrade to marshmallow don't forget to flash the new bootloader, radio, and boot.img too.
cam30era said:
Fastboot flash the system.img.
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Where would I grab that at?
toastgodsupreme said:
Where would I grab that at?
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Here >https://developers.google.com/android/nexus/images
cam30era said:
Here >https://developers.google.com/android/nexus/images
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Funny thing, didn't know TWRP could restore specific parts of a nandroid backup, so while I was heading in to make another backup before doing this I saw that it was asking my for check boxes on what to back up, that prompted me to go into the restore backup area and lo and behold, it prompts what to restore... so i just restored system, now I have NFC functional.
After SO much time wasted on extracting stuff all i had to do was remember to look at the TWRP restore function... UGH. Thanks anyway, everything is working now.
@toastgodsupreme,
You didn't waste your time. Consider it a learning experience

Create EFS Backup?

How can I create an EFS backup? I do have TWRP installed but I don't see an option for it anywhere.
Wanna have a backup just in case something goes wrong with flashing and modding the device.
KuroRyu said:
How can I create an EFS backup? I do have TWRP installed but I don't see an option for it anywhere.
Wanna have a backup just in case something goes wrong with flashing and modding the device.
Click to expand...
Click to collapse
https://twrp.me/faq/whattobackup.html
KuroRyu said:
How can I create an EFS backup? I do have TWRP installed but I don't see an option for it anywhere.
Wanna have a backup just in case something goes wrong with flashing and modding the device.
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Click to collapse
Just don't restore it, you'll brick your phone

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