[TUT] What Is Nandroid And How To Use It [Complete Guide] [VeNuM] - Samsung Epic 4G Touch

If you are new to Android, you probably have seen the term Nandroid used. If you are rooting your phone for the first time, or even an old crusty flashaholic, a Nandroid backup could be the difference between saving your phone or have having a $500 paper weight.
What IS a Nandroid? It is a full backup of the partitions on your device’s NAND flash (NAND actually stands for NOT AND,which in simple terms means an electronic gate). Basically a backup of your phones hard drive if you will... The Nandroid backup is a snapshot of your device (it means everything on your phone – your apps, data, your current ROM and even the kernel is backed up) at the time you do the back up. If you restore the back up, it changes your phone BACK to that state. You will need clockworkmod (CWM). So make sure prior to this you have CWM on your device.
Your SD Card data is not backed up in the process. Although the Nandroid backup itself is created on your SD card. Make sure you have enough space on your SD card to make a COMPLETE copy of your phone. It is highly recommended that once you have done a backup, you manually copy it to your computer in case your sd card is wiped or corrupted..
Pre-requisites:
1. Rooted Device:
You need a rooted android device.
2. Custom Recovery
While the OS is running you cannot do a backup. The boot loader in the recovery enables you to take a backup of the OS while it’s not running.
ClockworkMod (CWM) recovery is the example used in this tutorial.
Steps to Make a Nandroid Backup via CWM:
Backup and Restore via CWM:
1.Boot into Recovery.
2. Select ‘Backup and Restore’ from the recovery screen.
Once you are in recovery, scroll down to the option ‘Backup and Recovery’ and select it. You can scroll up/down through the menu using the volume buttons and select options using the power button.
3. Start the backup.
Once you are on the Nandroid screen, select ‘Backup’ to start the backup process. You have the option to restore backup on the same screen.
The backup process may take a while. Be PATIENT.
4. Transfer the backup to your computer (optional but recommended).
Once you reboot, you can see the backup in the ‘clockworkmod/backup/timestamp’ (or similar file) directory on your SD card.
Move, copy, or paste this folder on your PC safely.
It’s THAT simple…
Restore from a Nandroid Backup via CWM:
1. Boot your device into CWM and navigate to the Nandroid screen.
2. Choose ‘Restore’ and begin the process.
If you select ‘Advanced Restore’option, you may select which part of the backup to restore – i. e. the boot,system, data or cache. Or choose the whole backup.
3. Reboot your device. Your system is now restored and is exactly the same as the time when the backup was taken.
Final Thoughts:
If you are planning on rooting your phone or even a hard core flashaholic it is essential you use this painless and easy tool to save you when you need it. As noted above you can even revert back to just the kernel, data or whatever that could become corrupt or just plain messed up in the future. I hope this helps you and happy flashing!! - VeNuM

Once again another well written tutorial VeNuM. Going to add this to my list of articles to point people to. Just hope the ones who really need it will actually look here first. Thanks again.

Nice guide VeNuM, will definetly help with the noobs

VeNuM,
This is an awesome Tutorial - thanks for taking the time to write it.

Hi, thanks for a nice simple guide.
After flashing speedmod k3-7 on Criskelo v8 I have lost root.
I would like to restore to before I flashed speedmod to regain root.
Is it possible to restore a nandroid if I don't have full root?
What part should I restore to regain root?
Or do you know a Better way to regain root?
I'm still a noob, so I really appreciate all info I get. Don't want to mess this up.
Sent from my GT-N7000 using xda app-developers app

Is CWM required?
Or can we do this in stock recovery?
FF18 SFHub Rooted

mcadamry said:
Is CWM required?
Or can we do this in stock recovery?
FF18 SFHub Rooted
Click to expand...
Click to collapse
Venum used CWM as an example, but no, stock recovery wont work. Youll need a custom.
The op prerequisites are pretty clear. ^^^^ Look up at the op..
Sent from my SPH-D710

Good detail in this. Thanks!
Sent from my SPH-D710 using Tapatalk 2

So what if I have expensive taste on paper weights? You got a problem?
Great tutorial, I know how to use it already but this should defiantely encourage more people to use nandroid making you the saviour of a lot of money.
:thumbup:

As always, great tutorial. I've used it to make a backup, but thankfully never had to use it to restore. This does lead me to 2 follow up questions/scenarios:
1. The backup is provided you can get into CWM. What if the phone can't get into CWM and is "hard bricked"? Then I assume in this case you can't do anything, correct? What if you have the backup file on your PC as you suggested. Could you somehow through ODIN restore the backup file without access to CWM (provided the phone is recognized in ODIN)? Or would you have to use ODIN to restore, get it up an running, then install CWM, then use your backup to revert back? I guess it all comes down to if it's recognized or not in ODIN, if it is, then you're not really hard bricked; but if it isn't, your SOL?
2. If the phone can boot up, and let's say is stuck in a boot loop where it doesn't get into the rom, but can get into CWM, but the backup is corrupted. How would you transfer from your PC the backup without being able to "mount" the SD card to transfer it. Obviously with an external SD it's no problem, but what if you only use the internal?
Thankfully, I've never experienced any of the issues above, I'm just curious on the answers. Thanks guys.

Possible Sticky? Great guide, thanks!

Great tut. Just one question... Does the nand backup also create a backup of the internal sdcard ie /sdcard
Sent from my Galaxy R GT-I9103 using xda premium

The-Droidster said:
Great tut. Just one question... Does the nand backup also create a backup of the internal sdcard ie /sdcard
Sent from my Galaxy R GT-I9103 using xda premium
Click to expand...
Click to collapse
Wouldn't think that the backup calls to have the storage included. Not that I've seen anyway. That could lead to insufficient space for the backup itself. kernal, modem and ROM are what I believe to be in the backup.
Odd, cause I always pull everything out of storage and pictures to my laptop before doing a nand or anything. Just in case..
Sent from my SPH-D710

pretty useful, thanks a bunch dude :good:

Awesome, thank you for the great explanation. What does it mean when people create a stock nandroid? Are they reverting back to a stock ROM for the backup?

banabry said:
Awesome, thank you for the great explanation. What does it mean when people create a stock nandroid? Are they reverting back to a stock ROM for the backup?
Click to expand...
Click to collapse
Yes.
Sent from my SPH-D710 using xda app-developers app

BluesRulez said:
Yes.
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
As he said yes. You want a version that will bring you back to stock. So you can start over... Hopefully you will never need to use it...

Using agats kernal recovery it saves backups as .tar I'd there a way to fix? I've never used Odin so .tar are useless to me. I need the .zips
Force fed a failcake via Swype

What would happen if an insufficient space occurs?

z_extend_99 said:
What would happen if an insufficient space occurs?
Click to expand...
Click to collapse
Backup will fail and won't be a useable restore.
Sent from my SPH-D710 using Xparent SkyBlue Tapatalk 2

Related

Nandroid backup ?

Sorry for the dumb question, but a full nandroid backup, is done how? With titanium, or rom manager. Like I said sorry for the dumb question but everything I read just confused me. I'm really not that dumb just need some because I confused myself. Thanks!
Sent from my PC36100 using Tapatalk
I am new to this stuff but I learned pretty quick because I truly love my Evo so I want the best for it! (roms/kernels) but I over think everything so I need a few dumb questions answered from time to time...
JoshEvo
Nandroid backup is done through the recovery menu. Use titanium backup for the apps, sms backup for the texts, and for the contacts, go to contacts, hit menu then export to SD CARD.
Swyped from my sexy EVO.
They aren't dumb questions, you're just starting out. But:
1. Titanium backup is to backup your apps and system, in case you do a clean wipe. backup your apps every so often, especially when you changing roms.
2. If on clockwork recovery, you can backup your rom using it.
3. You can manually backup by turning the off the phone, powering back up, but holding vol+down ad you do, and then in the bootloader screen. Once there, select recovery, then go to backup/restore.
Thanks roxx, you cleared up what I said. You always seem to answer my questions or be in the same thread as me.
Swyped from my sexy EVO.
Cool thanks! I know how to flash roms through rom manager and kernels in recovery. I thought I was doing a nandroid backup by backing up my stock rom before flashing a new one. So I just boot into recovery (rom manager,or root manager) can't remember if it's root manager? But get into recovery and it will say nandroid backup? Once again thanks for helping me. I want to switch to a non-sense rom but don't wanna mess up my Evo!
Sent from my PC36100 using Tapatalk
Re read your answer and got my other question answered thanks all
Sent from my PC36100 using Tapatalk
Got it! Nandroid backup = backup/restore! So if I do a nandroid backup it will backup my phone/rom/etc... As it is now?
Sent from my PC36100 using Tapatalk
jacoballen22 said:
Thanks roxx, you cleared up what I said. You always seem to answer my questions or be in the same thread as me.
Swyped from my sexy EVO.
Click to expand...
Click to collapse
Anytime man, and you made perfect sense. And I'm always floating around.
Just_Josh said:
Cool thanks! I know how to flash roms through rom manager and kernels in recovery. I thought I was doing a nandroid backup by backing up my stock rom before flashing a new one. So I just boot into recovery (rom manager,or root manager) can't remember if it's root manager? But get into recovery and it will say nandroid backup? Once again thanks for helping me. I want to switch to a non-sense rom but don't wanna mess up my Evo!
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
Well you can boot into recovery from rom manager, just select reboot into recovery. And I believe you're referring to the bootloader screen. And it only says "nandroid' if you're on amon_ra recovery, but nandroid/backup are the exact same thing. On clockwork, navigate to backup/restore, then backup..and it'll take about 2-5 minutes. After that, go back to the main menu, and wipe factory/data, cache, and then go under advanced and wipe the dalvik cache. After that, install zip from sdcard > install zip > select your rom. And when you boot up, log in, blah blah, then use titanium backup to restore your apps but NOT system settings, or you can get some force closes.
If that's the case, why do I need to flash back to stock rom before flashing a new one? If I'm backing up my phone with a custom rom? Or do I flash back to stock then do a nandroid? You can stop me anytime...lol..I am normal...i swear I am
Sent from my PC36100 using Tapatalk
Just_Josh said:
If that's the case, why do I need to flash back to stock rom before flashing a new one? If I'm backing up my phone with a custom rom? Or do I flash back to stock then do a nandroid? You can stop me anytime...lol..I am normal...i swear I am
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
Lawlz, you don't have to flash back to the original stock rom before flashing a new one. You just backup your current rom, then flash the new one. You always backup befpre flashing in case something bad happens.
1. Backup/nandroid current rom
2. Wipe factory/data, cache, dalvik cache
3. Flash new rom
4.
And its good to ask questions.
Wow THANK YOU! That makes my life soo much easier. Thank everyone I think I now what I'm doing now and not just doing it! You guys rock!
Sent from my PC36100 using Tapatalk
Just_Josh said:
Wow THANK YOU! That makes my life soo much easier. Thank everyone I think I now what I'm doing now and not just doing it! You guys rock!
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
Anytime, and glad you've got it clear. Always here to help if ya ever need anything.
If they used the proper term, it might be much less confusing. Backups made from the recovery menu are synonymous with making an image of the phone's entire file structure (similar to acronis trueimage for windows). This includes all the system files, applications, settings, and any related customizations.
Titanium backup on the other hand serves the function of baking up an individual application and its' associated data. I don't think there's an equivalent of this on the pc, but you get the idea.
I still don't know where this term 'nandroid' comes from. I've seen it used both as a noun and verb on here, which only complicates matters for those not familiar with the android terminology.
gpz1100 said:
If they used the proper term, it might be much less confusing. Backups made from the recovery menu are synonymous with making an image of the phone's entire file structure (similar to acronis trueimage for windows). This includes all the system files, applications, settings, and any related customizations.
Titanium backup on the other hand serves the function of baking up an individual application and its' associated data. I don't think there's an equivalent of this on the pc, but you get the idea.
I still don't know where this term 'nandroid' comes from. I've seen it used both as a noun and verb on here, which only complicates matters for those not familiar with the android terminology.
Click to expand...
Click to collapse
'Nandroid' come from amon_ra, its what its listed from you when backup. Nandroid backup/restore. I personally don't know where it came from, but that's where people get it from.
I repeat what I hear, so nandroid could mean asswipe for all I know lol I never looked it up.
Swyped from my sexy EVO.
jacoballen22 said:
I repeat what I hear, so nandroid could mean asswipe for all I know lol I never looked it up.
Swyped from my sexy EVO.
Click to expand...
Click to collapse
I think it was a coined term relating to android, as that is the root of the word.
Nand is the type of flash memory that is used internally on our phones for the android system.
Nand + Android = Nandroid
I'm guessing that's how Amon came up with the name.
ckombo said:
Nand is the type of flash memory that is used internally on our phones for the android system.
Nand + Android = Nandroid
I'm guessing that's how Amon came up with the name.
Click to expand...
Click to collapse
Exactly how.

Unsure of answer to this question...

I have Clockwordmod Recovery installed on my GSII (T989). If I do a full backup, and then flash a custom ROM/Kernel...can I just do a complete full restore if I don't like it (from the backup I made)?
Thanks!
Well there is no cyanogen recovery so that's probably why no one is replying fyi.
Sent from my SGH-T989 using xda premium
nuggstein said:
I have Cyanogenmod Recovery installed on my GSII (T989). If I do a full backup, and then flash a custom ROM/Kernel...can I just do a complete full restore if I don't like it (from the backup I made)?
Thanks!
Click to expand...
Click to collapse
I hope you mean clockworkmod and yes.
Sent from my SGH-T989 using xda premium
xsteven77x said:
Well there is no cyanogen recovery so that's probably why no one is replying fyi.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
Big typo haha.
Exodian said:
I hope you mean clockworkmod and yes.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
So I don't have to worry about losing anything? Once I restore, it will be like I never changed anything? (Almost like an image backup of a computer)?
nuggstein said:
Big typo haha.
So I don't have to worry about losing anything? Once I restore, it will be like I never changed anything? (Almost like an image backup of a computer)?
Click to expand...
Click to collapse
Make a backup im cwm recovery and you can flash back to it and all will be as it was.
Sent from my SGH-T989 using xda premium
nuggstein said:
I have Clockwordmod Recovery installed on my GSII (T989). If I do a full backup, and then flash a custom ROM/Kernel...can I just do a complete full restore if I don't like it (from the backup I made)?
Thanks!
Click to expand...
Click to collapse
Exodian said:
Make a backup im cwm recovery and you can flash back to it and all will be as it was.
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
No i wouldnt suggest doing that when u make a back up in cwm you making a backup of that rom! If your worried about your data use either
Titanium backup or
MyBackup Pro
Sent from my SGH-T989 using Tapatalk
umm...I thought CWM recovery backed up everything...including data (excluding microSD card).
So, if I restore it, it restores the original Kernel and ROM? Is that correct?
If something goes wrong, while flashing new kernels/ROMS, I can boot into recovery and just restore?
I'm already rooted, I just want to be sure before I start messing with my device.
Thaks!
nuggstein said:
umm...I thought CWM recovery backed up everything...including data (excluding microSD card).
So, if I restore it, it restores the original Kernel and ROM? Is that correct?
If something goes wrong, while flashing new kernels/ROMS, I can boot into recovery and just restore?
I'm already rooted, I just want to be sure before I start messing with my device.
Thaks!
Click to expand...
Click to collapse
you are correct the Nandroid backup built into the CWM recovery will back up everything on your phone as it is. including any ext partition on your external SD card. (will not backup your FAT partition where your normal downloads and pictures go, as this is where the backups are stored) but your ROM, all apps and their data and anything on your EXT partition (if you have one) will be backed up.
i suggest copying the clockworkmod backup folder to your computer before flashing anything else. just in case it messes up your SD card somehow.
doing the full restore will automatically restore ROM apps and data as they were when you backed up. feel free to flash as many roms as you want, just make sure to keep your backup safe. and to wipe all data in between roms as usual.
although titanium backup is amazing. and will backup apps and their data while booted inside your rom. its amazing, check it out.
Cwm backs up everthing including rom, kernel, and data. When you restore your backup it will restore your phone the way it was the moment that you backed it up.
Sent from my SGH-T989 using xda premium
malaeus said:
you are correct the Nandroid backup built into the CWM recovery will back up everything on your phone as it is. including any ext partition on your external SD card. (will not backup your FAT partition where your normal downloads and pictures go, as this is where the backups are stored) but your ROM, all apps and their data and anything on your EXT partition (if you have one) will be backed up.
i suggest copying the clockworkmod backup folder to your computer before flashing anything else. just in case it messes up your SD card somehow.
doing the full restore will automatically restore ROM apps and data as they were when you backed up. feel free to flash as many roms as you want, just make sure to keep your backup safe. and to wipe all data in between roms as usual.
although titanium backup is amazing. and will backup apps and their data while booted inside your rom. its amazing, check it out.
Click to expand...
Click to collapse
I have TB Pro...are you saying it will back all of my apps/data up, and I can just restore it from within my new ROM?
Correct. Just use caution when trying to restore system apps.
Good.Luck!
Sent from my SGH-T989 using XDA App
Dude don't sorry so much!!! Super Noob!!! JK! Well not really you are never going to want stock again...just carefully flash your desired ROM.. use TB to restore all of your apps and their data. Do a nandroid back up of your current rom then one of your favorite roms after you set it up to you liking.
Sent from my Darkness.
using xda premium... with Master and Slaves new Rom Paradox II.

Some odin help or tips really would be appreciated epic touch 4g

So i had a gingerbread rom installed on my epic touch 4 g. I really liked it everything was perfect. I decided however to try an I c s rom.
Before i put the ics rom on my phone i backed up the existing gingerbread rom. when i did so though it did not save it in a zip like i am used to instead for some reason it got backed up into 4 files 2 .tars and 2 other files. i want to go back to my old rom because everythig was perfect however i dont know how. i know i am supposes to use odin or aomething with .tar files but why are there 4 files in the folder i backed up to ? i have attached screen shot so you can see the files. any help appreciated. whrere do i get odin ? How do i use it to restore my old rom and which of these 4 files do i need to use or do i need to use all of them ?
Actually the screen shot not working. the four files in the backup file are
Boot.img
data.ext4.tar
recovery.img and system.ext4.tar
Sent from my SPH-D710 using XDA
How did you back it up? In clockwork mod? If so then all you need to do is go to custom recovery Power +vol up untill you see the first samsung screen then let go then go to backups and restore, restore and just select to restore the one that you want. They have the date that you did the backup on them so that makes it easier finding the one you are looking for.
Thanks for responding. that is how i would usually restore if it was a zip. but becausr it is not a zip and it is a .tar and .img files that way does not work. that is why i think i need to use odin. but i dont.know how to use odin
Sent from my SPH-D710 using XDA
Ok well here is what You do. You need either mobile odin or regular odin. Find the gunslinger kernel frim rogue. Its el29 based. Or if you want to be even safer get the el26 kernel from http://chris41g.devphone.org make sure you are only getting tars do NOT download the zip. Put it in odin under the pda option. Make sure only reboot is checked. Start odin. When it is done it will lock up. Its fine. Push and hold volume up plus power until you get into recovery. Now go and install calkulins format all a couple of times for good measure. Then go to your backup and restore and restore it. I know what happened man. When you looked inside the file you saw tars. Well when it backs up it creates those tars and is able to read only those tars. So cwm does work when restoring a backup. Also never ever use any repacked ics recovery to wipe anything. It will brick eventually. I would always recommend using odin to flash that kernel and do all your stuff from there.
Sent from my BAD A$$ EPIC TOUCH 4G
Also about odin. Phone is only for modems do not use it for roma or kernels. It is a sure way to mess things up. Pda is for your kernel and roms. The only thing I ever have checked is reboot. You will know if odin recognized your phone if the com box is yellow with a number and there is a ding. Btw odin only works with windows I believe. Heimdall is for linux. Never ever pull the cord out during a flash. To use odin your phone must first be in download mode by holding volume down and power until it gives you a warning about flashing custom firmware. Push volume up at that point and you are now in download mode
Sent from my BAD A$$ EPIC TOUCH 4G
towir022 said:
So i had a gingerbread rom installed on my epic touch 4 g. I really liked it everything was perfect. I decided however to try an I c s rom.
Before i put the ics rom on my phone i backed up the existing gingerbread rom. when i did so though it did not save it in a zip like i am used to instead for some reason it got backed up into 4 files 2 .tars and 2 other files. i want to go back to my old rom because everythig was perfect however i dont know how. i know i am supposes to use odin or aomething with .tar files but why are there 4 files in the folder i backed up to ? i have attached screen shot so you can see the files. any help appreciated. whrere do i get odin ? How do i use it to restore my old rom and which of these 4 files do i need to use or do i need to use all of them ?
Actually the screen shot not working. the four files in the backup file are
Boot.img
data.ext4.tar
recovery.img and system.ext4.tar
Sent from my SPH-D710 using XDA
Click to expand...
Click to collapse
That sounds like a CWM backup to me. They package it just like that. Here is a screenshot of my last backup through CWM.
View attachment 951989
If you see files with those names (or similar) then you've got a CWM backup and should restore it through CWM.
Good luck!
rwilco12 said:
That sounds like a CWM backup to me. They package it just like that. Here is a screenshot of my last backup through CWM.
View attachment 951989
If you see files with those names (or similar) then you've got a CWM backup and should restore it through CWM.
Good luck!
Click to expand...
Click to collapse
Cwm cant restore it because cwm is looking for a zip file and there is none
Sent from my SPH-D710 using XDA
You are trying to restore the wrong way! You are trying to install from zip versus using a recovery image. Go to 'Restore' in recovery NOT install from zip. Here is a vid I just found from Qbking77 http://youtu.be/jZRnH-_XZmM go to marker 6:30 and you will see the back and restore menu choose advanced restore. From there you'll select your options (usually all) and the file locations (usually external SD card) in the sdcard or clockworkmod directory.
leaderbuilder said:
You are trying to restore the wrong way! You are trying to install from zip versus using a recovery image. Go to 'Restore' in recovery NOT install from zip. Here is a vid I just found from Qbking77 http://youtu.be/jZRnH-_XZmM go to marker 6:30 and you will see the back and restore menu choose advanced restore. From there you'll select your options (usually all) and the file locations (usually external SD card) in the sdcard or clockworkmod directory.
Click to expand...
Click to collapse
Beat me to it!
towir022 said:
Cwm cant restore it because cwm is looking for a zip file and there is none
Sent from my SPH-D710 using XDA
Click to expand...
Click to collapse
Here's a link for some very basic info about CWM (it also has some screenshots from a CWM build, out may not be the same as yours but is close).
http://forum.xda-developers.com/wiki/ClockworkMod_Recovery
I'd strongly suggest you read this and everything else you can find about CWM, your phone, etc before you find yourself with a beautiful brick.
And it might not hurt to tell all the wonderful people here trying to help you avoid bricking your phone how thankful you are for their help...
I hit yalls thanks, because this **** feels y'all were no help.
Just poppin in for a short. Been hela busy.
Indrid Cole said:
I hit yalls thanks, because this **** feels y'all were no help.
Just poppin in for a short. Been hela busy.
Click to expand...
Click to collapse
Lol you da man! Thanks!
I thanked everyone have no fear it just took a minute
Sent from my Nook Tablet using Tapatalk

[Q] smelkusMOD nand backup

I flashed the smelkusMOD Recovery instead of Clockwork as everyone seems to adamantly suggest and had a quick question about the backup. It gives me a list of things to backup. By default the first 4 are selected and the rest aren't. Clockwork just ran a backup. I want any restore to basically bring my phone back to a point in time restore with all my apps/data/settings/etc. Am I fine leaving the defaults or should I select more options?
If ur SD card is partitioned for running a2sd u are going to want to select SD ext as well. Its generally a good idea to keep a backup of ur wimax but not necessary.
Sent from my PC36100 using Tapatalk 2
Cool. I will go ahead and add those just to be safe. Thanks.

How do I restore my phone with recovery?

I did a backup before and flashed a rom. Then i flashed another rom. I cant seem to restore through recovery. Says it cant find anything.
Sent from my SGH-T999 using xda app-developers app
gyggyty said:
I did a backup before and flashed a rom. Then i flashed another rom. I cant seem to restore through recovery. Says it cant find anything.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
If you wiped the data then it was erased... formatted the partition, same thing. It's gone.
Lesson learned....
Next time, if you make a backup CWM or otherwise, before doing any ROM installs, copy the backup to the external SD Card and/or your computer. That way, if you have to, you can copy the files back to the phone and recover the previous state. I am not really sure that the CWM backup does the modem partition, cause I thought my modem was a different version and restoring did not change the version to what I thought it would be. Don't hold me to the fire on that, like I said, I may be wrong on that....
Good Luck, & Aloha!
Thanks for the lesson. Dont know why CWM didnt save the backup to external in the first place. But there is still about 1gb data missing for some reason.

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