[Q] is wipe necessery when instaling new rom? - General Questions and Answers

i don't want to loose any of my data or apps, but i want to have a new ROM. i'm just wondering if the wipe option is necessery when loading your new Rom on your device?

Would help if you stated what OS and device you are talking about.
But in general, no. Flashing ROMs formats the memory. Even if you could keep data on your phone, you wouldn't want to. It would almost certainly cause problems with the new ROM.
There are easy ways to backup personal data when you flash.

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[Q] What to do to avoid data loss when flashing

This question stems from a few niggling performance/lag issues on my Samsung Focus which I think will be cured by a fresh official ROM flash, but I do not want to lose any of my personal data.
I presume that when flashing a ROM, all data is lost. How can I essentially restore the lost data on the phone?
Can I backup using WP7 backup v1.9 (found on these forums) and then restore? Would this negate the point of the flash? What files are not backed up/restored (system files)?
Thanks,
jt
jt3204 said:
This question stems from a few niggling performance/lag issues on my Samsung Focus which I think will be cured by a fresh official ROM flash, but I do not want to lose any of my personal data.
I presume that when flashing a ROM, all data is lost. How can I essentially restore the lost data on the phone?
Can I backup using WP7 backup v1.9 (found on these forums) and then restore? Would this negate the point of the flash? What files are not backed up/restored (system files)?
Thanks,
jt
Click to expand...
Click to collapse
If you set zune to back up everything then all of your pictures and music is on your computer (Note: your ringtones will be gone). Your documents should be on Sky Drive unless you saved them localy, if so you can move them Sky Drive, your games and apps can be re-installed using either the Market Place or the re-installer app.
Thanks for the tip. I was already aware of those possibilities.
I think the SMS restore is a bit of an issue. From what I've read the only program available isn't perfect yet, so that leaves a complete backup/restore as the only option to preserve my messages.
This begs the question as to whether flashing then restoring a backup is a pointless exercise.
The sms tool , is this one you are talking about ? http://forum.xda-developers.com/showthread.php?t=1448197
Flashing and then restoring from a previous backup will not work. Backup is a complete image, it wipes out anything else.

[Q] Encrypting the NS but keeping full recovery functions

Hi there.
So, I wanted to encrypt my Nexus S to secure my personal data on it. The problem is, that I also want to update my CM9 rom every now and then. With the built-in encryption from ICS, the CWM recovery can't access the sdcard any more (and presumably also can't access other partitions to update files but can only wipe them which would remove the encryption there).
Anyway, to make this thread short: Does anybody knows (or even better: is using) a way how to encrypt the personal data on the phone but still being able to use a custom Rom and update that? Maybe there is an app I can use for that (I read about WhisperCore, but you don't hear anything new from it since twitter purchased it).
Is it even possible to encrypt the phone and then update the rom without losing the encryption?

Titanium Backup Regimens?

Hey everyone-just wondering what your preferred regimen for backups/restores is when using tibu. I backup all modified data for my apps nightly, but I don't really play with user data for the sake of conflicts when flashing between ROMs. Can anyone provide me with some insight as to how to keep as much system data as possible between ROM flashes(ie my email accounts, WiFi access points, some system settings, etc) that arent likely to conflict with other ROMs (so long as they're on the same version of Android)?
Just wondering if there's an optimal backup/restore regimen I'm unaware of.
Thanks guys!
Sent from my SAMSUNG-SGH-I727 using xda premium
Subscribed! Same questions have been running through my head.
System data will potentially corrupt your system, from one base (ROM) to the other. Wiping data is necessary to prevent bugs and glitches.
If you are flashing an update to an already installed ROM, you can forgo the data wipe (factory reset), and wipe only: cache, dalvik, and system. This will keep your data intact.
Doing a factory reset on occasion after several flashes, will clean up some potential problems.
Wiping SD card, internal and external, will also help with any potential problems. If wiping SD card you should only have to save media (pix, music, video) and any docs to your PC. Then format card, then add back your media and docs. You should notice better performance.
Wiping data can be necessary, a part of flashing ROMs. As far as TiBu I backup everything. When restoring you have the option to restore data or not. If you are restoring from a different ROM choose to only restore app.
ChillFactorz said:
System data will potentially corrupt your system, from one base (ROM) to the other. Wiping data is necessary to prevent bugs and glitches.
If you are flashing an update to an already installed ROM, you can forgo the data wipe (factory reset), and wipe only: cache, dalvik, and system. This will keep your data intact.
Doing a factory reset on occasion after several flashes, will clean up some potential problems.
Wiping SD card, internal and external, will also help with any potential problems. If wiping SD card you should only have to save media (pix, music, video) and any docs to your PC. Then format card, then add back your media and docs. You should notice better performance.
Wiping data can be necessary, a part of flashing ROMs. As far as TiBu I backup everything. When restoring you have the option to restore data or not. If you are restoring from a different ROM choose to only restore app.
Click to expand...
Click to collapse
Well I appreciate the reply, but this is all stuff I'm aware of. However if what you're saying is that nobody out there really bothers with restoring any system data from one base to another, then that answers my question and what I'm already doing is the best way to go.
Thanks.
stevenavm said:
Well I appreciate the reply, but this is all stuff I'm aware of. However if what you're saying is that nobody out there really bothers with restoring any system data from one base to another, then that answers my question and what I'm already doing is the best way to go.
Thanks.
Click to expand...
Click to collapse
No one restores system data unless they want problems.
Sent from my GT-P5113 using Tapatalk 2
Exporting sms and call log is the only thing I've ever need. I was extremely happy the day they added that.
I don't even backup app data anymore. Except for 2 authenticators I use. I prefer to keep as much stuff on cloud storage as possible. I trust my SR and ROM, I just don't trust myself.
Sent from my SAMSUNG-SGH-I727

[Q] How do apps "survive" flashing a kernel and ROM

Hi,
I was wondering: What is the reason when you flash a new kernel (BIOS) and ROM (OS) your apps can be still there?
Is it because the apps can be considered as portable programs - to use windows terminology - and anly some system folders are overwritten when flashing a new ROM?
Thanks,
TeTTiweTTi
when you install kernel, your apps will still untouched!
when you install new rom, your apps will be removed because this format the /system partition and wiping the data will remove your personal apps! but if you just made an update, I think your apps will will there.
As long as you dont wipe data or format system while installing a new rom then your apps will stay there but thats not recommended to prevent any bugs or issues that might happen to u.. Happy flashing
sent from my GT-i8150 cm10.1

[Q] How does a custom recovery works?

Ok, so i'm new to all this stuff about custom recoverys and ROMs. How exactly do they work?
Let's say i make a custom recovery image of my current ROM, wich is stock, does it just backup the OS or my personal files (music, photos, apps, etc.) too?
I'm asking this primarly because i want to upgrade my phone, but to do so i have to flash the stock firmware because i've modified some system files. Wich bring to my other question, flashing ROMs wipe user data? i've read some split responses to this, some people say it does some say it doesn't.
And my final question, let's say i made a backup, wiped my phone flashed stock firmware and updated, now how i recover my data from the
backed up ROM, i mean it is a different version, does it have an option to just restore user data?
Thanks in advance, and sorry if these are too much questions.
it'll back up system, data, boot.img and dalvik cache.
your sd partition isn't backed up, but all the stuff on it will be readable by whatever new rom you put on it (unless you wipe EVERYTHING [not a good idea]).
when you're changing roms/etc, you want to place the rom.zip + gapps.zip (and custom kernel.zip if you're going to use one) on your sd partition. you do this because usb storage mostly doesn't work with custom recoveries as of yet on this device meaning once you've wiped, if you don't have a rom on your sd partition you're mildly screwed in that you'd have to reflash everything from a stock image (meaning you will lose root, all your personal files and whatever rom was on the phone - basically everything goes back to stock bar the bootloader).
e: as for restoring all apps data, use something like titanium backup. i always have a backup on my sd partition of all my current apps (plus wifi passwords, accounts info, sms messages etc to save time/effort when restoring after putting a new rom on). i also always set TB to backup all modified/new data every night at about 3am, then upload the backup to google drive so that if i either brick my phone or accidentally wipe everything, at least i can get back to where i left off.
If you forget to place the ROM zip, and have formatted the device, it is not necessary to flash stock. You use adb side load which is present in every recovery.
in that case i need to remember that for future use - i hardly ever use my pc with my phone now as you can pretty much do anything (update recovery etc) on the phone alone.
that, and i'm on windows 8.1 which afaik doesn't play nicely with fastboot or adb.
twist3d0n3 said:
....and i'm on windows 8.1 which afaik doesn't play nicely with fastboot or adb.
Click to expand...
Click to collapse
....i think this is a rumor. Never ever had any problems on W8.1
^ good to know, thanks

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