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nandroid restore

Before doing a nandroid restore, is it necessary to wipe data, cache and dalvik cache?

bctf1 said:
Before doing a nandroid restore, is it necessary to wipe data, cache and dalvik cache?
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No it is not required because nandroid backup has everything, including cache and dalvik cache.

tpbklake said:
No it is not required because nandroid backup has everything, including cache and dalvik cache.
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Thank you tpbklake for your quick reply.

[Q] About installing CM7 Nightly builds

Hey guys just a quick question about installing nightly builds on the nook. When Rom Manager asks whether to wipe data/cache and what not, if I select it, will it wipe the internal memory completely? leaving no user files behind? or will it only wipe the system files?

It will wipe everything and it will be a fresh install.
Sent from my LG Optimus V using Tapatalk

If you update, just wipe cache

It wipes the /data partition but doesn't wipe /sdcard /sd-ext or /met/emmc.
Sent from my MB860 using xda premium

EGM92 said:
Hey guys just a quick question about installing nightly builds on the nook. When Rom Manager asks whether to wipe data/cache and what not, if I select it, will it wipe the internal memory completely? leaving no user files behind? or will it only wipe the system files?
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Just wipe Davlik.

if boot is longer than normal after wipe, it's normal!

votinh said:
If you update, just wipe cache
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patruns said:
Just wipe Davlik.
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So... just wipe Davlik Cache is what you guys are saying?

Good question helped out a newb here

Jiv_au said:
So... just wipe Davlik Cache is what you guys are saying?
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Correct
Sent from my LG Optimus V using Tapatalk

Jiv_au said:
So... just wipe Davlik Cache is what you guys are saying?
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Note: wipe cache and wipe Dalvik cache are 2 different things.
+ wipe cache is a quick way to clean the current running ROM
+ wipe Dalvik is a completely clean.
After wipe Dalvik, next time it boots, it will take a lot longer time due to the device has to re-compile the whole thing before ROM start running and booting.

I think I need to drop a few lines about wipe cache/Dalvik.
As I posted above, I said it wiped clean.
Apparently, I am NOT 100% correct.
I just updated to nb198, wiped cache (formatting /cache) then wipe Dalvik cache.
After done updating ROM, booting up, I expected everything clean, completely fresh.
It's not the case, I went to Market and all old search history were still shown. Not only with Market but other apps too.
So
a. either wipe cache/Dalvik is NOT completely clean wipe or
b. it was completely clean but somehow, those old cache info, which stored somewhere I don't know, get automatically restored back.

Okay, I did a quick read of the FAQ for CWR, and came across these:
Wipe cache partition
Wipes the cache partition of the device to clear all the data accumulated there over use. This is often used before installing a new ROM, app, kernel or any similar mod via recovery.
Wipe Dalvik Cache
Allows you to wipe the cache for the Dalvik virtual machine (the custom-built Java virtual machine for Android).This is required before most ROM installations and at other occasions too, for fixing some problems.
So, I'm taking this guide on board and will wiping Cache AND Davlik. So that's two steps prior to installing a new CM7 nightly build.
votinh said:
I think I need to drop a few lines about wipe cache/Dalvik. *snip*
a. either wipe cache/Dalvik is NOT completely clean wipe or
b. it was completely clean but somehow, those old cache info, which stored somewhere I don't know, get automatically restored back.
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You didn't happen to store them in uSD card? Or perhaps app data/cache are separate from system data/cache...
Will look into it further...

[Q] Change rom using TWRP recovery

Hi, I'm on PA 3.99 rom and I'd like to install Purity Rom, but it's required a full wipe. My recovery is TWRP, so for a full wipe I need to wipe cache, dalvink cache, system and factory, right? Internal and External card isn't necessary, right? Because It will erase the Purity zip in my memory and I won't be able to installed. If possible I'd like a clear response, so I'd finally understand what to do exactly with no more worries.

Matteo Mazzu said:
Hi, I'm on PA 3.99 rom and I'd like to install Purity Rom, but it's required a full wipe. My recovery is TWRP, so for a full wipe I need to wipe cache, dalvink cache, system and factory, right? Internal and External card isn't necessary, right? Because It will erase the Purity zip in my memory and I won't be able to installed. If possible I'd like a clear response, so I'd finally understand what to do exactly with no more worries.
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That's correct, cache, dalvik cache, data and system. Your external sd and internal sd should be untouched.
☞Sent from here☜

A factory reset in recovery wipes /cache and /data ... the dalvik cache resides on the data partition and is thusly wiped also.
You could wipe /system to be "thorough" ... but the Rom zip.should have a format /system line in the updater script.
I only ever do a factory reset between roms.

Thank you very much, it's what I wanted to hear! (Never understood if wipe factory was even wipe data ahah XD)

studacris said:
A factory reset in recovery wipes /cache and /data ... the dalvik cache resides on the data partition and is thusly wiped also.
You could wipe /system to be "thorough" ... but the Rom zip.should have a format /system line in the updater script.
I only ever do a factory reset between roms.
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Oh ok!! Now I get it! Really appreciate everyone answer! (Sorry for my English, lately I haven't been using it very much!)

CM12 - black screen after enter my PIN :(

I have a weird issue with my N9005 (hlte). I just got it new and am still a little inexperienced with flashing it. Preblem occurs when flashing ANY CM12 based rom. Flashing works well with TWRP 2.8.5.0 but once Android booted just after enetring my PIN the display turns off and I can't do anything and have to hard reboot my phone. CM11 runs without any issues
I'd relly like to go for CM12 so any help will be appreciated.

LS.xD said:
I have a weird issue with my N9005 (hlte). I just got it new and am still a little inexperienced with flashing it. Preblem occurs when flashing ANY CM12 based rom. Flashing works well with TWRP 2.8.5.0 but once Android booted just after enetring my PIN the display turns off and I can't do anything and have to hard reboot my phone. CM11 runs without any issues
I'd relly like to go for CM12 so any help will be appreciated.
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Did you wipe data and cache? After installation

kenny1991 said:
Did you wipe data and cache? After installation
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I performed a full wipe before flashing. Any advantages wiping again, once flashed?

LS.xD said:
I performed a full wipe before flashing. Any advantages wiping again, once flashed?
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If you read installation instructions from temasek it says clear dalvik and cache. For good measure. No full wipe after flash. Only cache and dalvik

If i full wipe my phone after flashing ... i got no System at all ...
It looks like -> this <-

e1n3r said:
If i full wipe my phone after flashing ... i got no System at all ...
It looks like -> this <-
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Lol
Haha I did correct myself and told you to not full wipe after flash. Only do that before flashing. Wipe dalvik cache and cache after flashing.
Do a clean install and try again. Full system, data wipe and caches in recovery. Use twrp doing that. Then flash and wipe cache and dalvik. Reboot. Use the latest build 8.7

kenny1991 said:
Lol
Haha I did correct myself and told you to not full wipe after flash. Only do that before flashing. Wipe dalvik cache and cache after flashing.
Do a clean install and try again. Full system, data wipe and caches in recovery. Use twrp doing that. Then flash and wipe cache and dalvik. Reboot. Use the latest build 8.7
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Yes Sir thats the way i do any time look my Video there is no full wipe after Install only Cache, Dalvik (Factory reset)
greets

Blisspop: updating without wiping data

Hi,
I've recently done a succesful flash of Blisspop after a full wipe.
Now I want to update, but I don't want to do a full wipe. Simply installing the zip on-top gives a permanent booting screen. Can you update without starting from scratch?

Did you wipe cache & dalvik after flashing updated zip?

I did not. Is that the only required extra step? And will I lose data if I do so?

Kalenden said:
I did not. Is that the only required extra step? And will I lose data if I do so?
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No, you only lose data when you wipe the data partition
In recovery, you'll see different named partitions, cache, dalvik cache, system, data, etc etc
If you wipe System, you wipe the ROM
If you wipe Data, you wipe your user data
Caches are just temp partitions, safe to wipe any time, only side effect is a longer first boot as Android needs to re-cache everything
But yes, you do need to wipe the caches when updating to a newer version of the same ROM/Droid version, and no you won't lose your data
Here's how I do it:
Wipe System
Wipe Caches
Flash new ROM
Flash new Gapps
Flash SuperSU if needed
Wipe Caches again
Reboot
Result = New ROM with no loss of data
That's a clean flash, a dirty flash is how you did it without wiping System
If you are moving to a newer version of android, or a different ROM, wiping data becomes more necessary, especially if the move is to an older version of droid

Thanks. I'll try it out.