Database Develop

[Q] About Darktremor A2SD

I am using the rom which is Darktremor A2SD compatible. Every time I change another rom then all apps will get force close. I need to reinstall those apps.
Is it normal?
Anyone can help me? Thanks!!

When you change ROMs, it's advised to ALWAYS WIPE EVERYTHING. That includes EXT partition.
If you want your programs to run after moving to another ROM - back them up using Titanium, change ROM, and restore them.

Jack_R1 said:
When you change ROMs, it's advised to ALWAYS WIPE EVERYTHING. That includes EXT partition.
If you want your programs to run after moving to another ROM - back them up using Titanium, change ROM, and restore them.
Click to expand...
Click to collapse
Actually I'm not sure wiping EXT is necessary but certainly data, caches etc.. If problems continue, then wipe EXT too.
EXT should just have the APK's on it, they should just work.

If you're wiping /data, then you're left with APKs on EXT and no data structure for them in /data/data. Might be just the reason for force-closes.

Jack_R1 said:
If you're wiping /data, then you're left with APKs on EXT and no data structure for them in /data/data. Might be just the reason for force-closes.
Click to expand...
Click to collapse
most roms detect and "re-install" the ext apps on first boot. All 200+ for me
Wiping ext would be the very last thing I'd do to solve a problem.

I used to do this. But i learned that it breaks some apps, and the built in rom restore function will restore any apps you got from the market. You need to do a full wipe when going to a new rom. upgrade may not need this, but some devs like king dont know how to make upgrades so all of his new versions require a full wipe.

Thanks you all! Seems that full wipe is necessary

[Q] Updating a ROM (MIUI)

I am using MIUI 5.31 at the moment.
However it was known to be there'll be some update today after.
Is there any way to back-up and restore on the new version of ROM?
I have backuped all the systems and applications using the back-up menu.
Do I simply get new 5.32 and restore using the backup i created just now?
And to install a new version, from my old version 5.31, do I have to do
format /system
format /cache
format /data
and then install from SD card?
(or do I have to go back to Froyo? hopefully not )
And final question! Everytime I update the ROM, do i have to re-calibrate the battery? (Make battery full and wipe-out the battery status)
Thanks in advance! have a good day

um im newbie too so don't trust me too much
for updating existing rom.. do not require back-up and stuff..
u just /format system and cache and install the new Rom using CWM
it does not wipe out anything everything stays same except the rom version
hope this helps
Oh yeah and I wanted to ask question for calibration thing so.. if anyone have answer plz post XD

what does format /datadata do exactly? that in comparison with format /data

candoo100 said:
um im newbie too so don't trust me too much
for updating existing rom.. do not require back-up and stuff..
u just /format system and cache and install the new Rom using CWM
it does not wipe out anything everything stays same except the rom version
hope this helps
Oh yeah and I wanted to ask question for calibration thing so.. if anyone have answer plz post XD
Click to expand...
Click to collapse
Thanks! Now I have some ideas how to do it. I will try your way first. But don't we need to format / data aswell?
I'm also getting confused between format /data and format /datadata. ><
Sent from my GT-I9000 using XDA App

Feelosopher said:
Thanks! Now I have some ideas how to do it. I will try your way first. But don't we need to format / data aswell?
I'm also getting confused between format /data and format /datadata. ><
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
If you want to do a completely clean install, format cache, system, data and datadata. If you want to keep your apps etc, format system and cache. Hope that clears things up

Shrapnel2 said:
If you want to do a completely clean install, format cache, system, data and datadata. If you want to keep your apps etc, format system and cache. Hope that clears things up
Click to expand...
Click to collapse
^^ yeah thats the best way, u dont need to format /data everytime, only when you feel like a clean install.
as for battery calibration, this is not needed for upgrades. usually a battery calibration is required when a full firmware is flashed with ODIN.
And MIUI backup will allow you to restore backups on older / newer versions of MIUI, but as mentioned above, you dont need to backup unless you are going to format /data and /datadata - where apps are stored

Shrapnel2 said:
If you want to do a completely clean install, format cache, system, data and datadata. If you want to keep your apps etc, format system and cache. Hope that clears things up
Click to expand...
Click to collapse
yeah, just format cache and dalvik cache if want to maintain your apps!
Sent from my GT-I9000 using XDA Premium App

wow! thanks for the answers guys. It really helped me out to understand it more!!
I'll try out the new rom now. Thanks again!

[Q] Wipe issue

I've been learning to edit and make ROMs for couple of months, some of the early works had been uploaded to a Chinese Milestone developers' BBS.
But there is a simple question which still confused me a lot. (- =)
Some senior developers in that Chinese BBS reminded their supporters in their threads to wipe before and AFTER applying the Rom in Open Recovery. But, why should we wipe AFTER applying the Rom? I've viewed some threads here, but none of them require to wipe after applying.
So I wonder if it is really necessary to wipe AFTER applying a new ROM. I'm very appreciate if you guys can answer my question and tell me why. Thx~~~
BTW, Xda is an excellent website. And it's much more professional than the BBS I used to visit. May you have a nice day~

It's a common myth. I'm not sure why it gets repeated over and over again.
One wipe is enough. Dalvik-cache is not populated again until the system is booting for the first time. While you are in recovery, it also doesn't matter if you wipe before or after you apply the update (unless the updater script in some particular update.zip also installs something to /data or /cache partition, which is not very common).
You can read cvpcs's thoughts on this matter here: http://cvpcs.org/blog/2011-06-05/time_to_wipe_data/cache

kabaldan said:
It's a common myth. I'm not sure why it gets repeated over and over again.
One wipe is enough. Dalvik-cache is not populated again until the system is booting for the first time. While you are in recovery, it also doesn't matter if you wipe before or after you apply the update (unless the updater script in some particular update.zip also installs something to /data or /cache partition, which is not very common).
Click to expand...
Click to collapse
Thanks a lot~ (I'm looking for some threads which can explain how "wipe" works. Actually I still got some problem about that, like " Why system app still maintain after wipe? Is it because those system app has a backup in Flash Memory, and it will restore after wipe the EEPROM?")

(This message is only for testing whether it is reply to the original poster or the people who answer it....)

[E]Xtreme said:
Thanks a lot~ (I'm looking for some threads which can explain how "wipe" works. Actually I still got some problem about that, like " Why system app still maintain after wipe? Is it because those system app has a backup in Flash Memory, and it will restore after wipe the EEPROM?")
Click to expand...
Click to collapse
System apps are installed into a different partition (/system), which also holds the OS files. Wiping data and cache only wipes the /data and /cache partitions and leaves /system alone. Otherwise the phone wouldn't work at all.

Dave Lister said:
System apps are installed into a different partition (/system), which also holds the OS files. Wiping data and cache only wipes the /data and /cache partitions and leaves /system alone. Otherwise the phone wouldn't work at all.
Click to expand...
Click to collapse
Got it~ That's very kind of you.

create ext4 for use with a2sd

hi,
i'm usin ra passion 2.2.1 and wan't to use a2sd from ics 4.0.3 evervolv. how can i create a part ext4?

Google:
"a2sd partition sd card".
Enjoy.

Try 4EXT recovery www.4ext.net
I think its the easiest way to create partition.
Or else you can do it in pc via partition managers(i use minitool partition wizard)
You can google it and also can search in youtube for video tutorials.
Sent from my Nexus One using Tapatalk

thanks for your help, i've done it in recovery.
one question is left:
what happen if i format the partioned sd-card under windows and do a full wipe in preparation for installing a new rom. i've read sd-ext even survive a full wipe? what does that mean? stays the partition untouched when i format the sd-card with windows? and what about the apps in the partition? are they still there even after a full wipe and can i use them after flashing a new rom out of the box?

Glad u succeeded in partitioning
Now if you format the fat32 partition in windows using those partition tools doesnt affect ur ext. Ext stays untouched but all the data on fat32 will be wiped(so backup first to pc)
If u want to merge there is an option called merge for that.
There is an free windows software called sdformatter, that formats the entire sdcard(fat32+ext)
Hope i helped a bit :thumbup:
Sent from my Nexus One using Tapatalk

ok. i wan't to format it with the windows internal function via right click. is it the same and the ext4 stays untouched?

Full wipe in recovery wipes SD-EXT too.

heinz gruber said:
ok. i wan't to format it with the windows internal function via right click. is it the same and the ext4 stays untouched?
Click to expand...
Click to collapse
i do beleive that it should be untouched, cos normally windows cannot see the ext partition and hence only fat32 will be formatted
Sent from my Nexus One using Tapatalk

ok. when ext4 stay untouched and i flash a new rom the apps are still in the launcher after flashing?

Jack_R1 said:
Full wipe in recovery wipes SD-EXT too.
Click to expand...
Click to collapse
when i flash a new rom i use the format.zip form the xda user temasek which wipes system, boot, data and cache. so is sd-ext untouched when i use this file?

You insist on not listening and/or not understanding.
When you select "wipe data/factory reset" in custom recovery, EXT partition IS WIPED COMPLETELY. It doesn't stay.
I believe the same happens when using temasek's script, never bothered using it, so I can't say with 100% certainty.
If you don't wipe your phone and install a new ROM - be prepared for crashes of anything to everything, unless you install a ROM which is 100% compatible with what you have already - the next generation of the same ROM, usually.
If you're using A2SD and don't wipe EXT partition - you'll have crashes as soon as you boot, since system apps' data will be there (and wrong).
To keep your apps and their data, use one of the backup apps available in the Market, like Titanium Backup.

as Jack_R1 explained its always better to wipe everything(system,cache,dalvik n sdext) to be on safer side to avoid crashes n FCs.
Sent from my Nexus One using Tapatalk

Temasek's Extreme Wipe does Data/System/Boot partitions but don't remember seeing ext in the list
However, as alluded too, I would format all outside phone with sdformatter or I think gparted, although never used that one
I thought I read a long time ago Windows formatter not recommended and do a full wipe not partial with whatever you use
Back up sdcard first
also, I believe you can use the Alignment Cool zip to get ext 4 from 3 on Amon and not lose anything--still backup
you do know MeDroid uses Ia2sd and different from a2sd on implementation

You don't need to wipe the regular FAT partition on SD card between flashes, because there's nothing there that loads automatically. And "wipe data/factory reset" option in recovery also wipes /sdcard/.android_secure.

hey guys, thanks for your answers i will keep them in mind.
edit:
one more question:
if i uses temaseks script and the sd-ext is untouched and i flash a newer version of my rom, are the apps then still there after flashing and booting the updated system? or is there another step i've to do?

No, the apps aren't there anymore - or to be correct, the apps are there, their data is gone (because the app data doesn't reside on EXT partition, unless you use specific mounting methods).
When you flash an updated version of your ROM, just don't wipe anything at all unless the instructions specifically mention having to wipe before installing that version. That means - don't execute temasek's script at all.

[Q] The wisdom of formatting the system partition

I'm getting ready to update my old ParanoidAndroid (with CWM v5.5.0.4) with the CarbonRom.
I've backed up all kinds of logs, settings, and data that I think I may want to restore with the new rom.
I've also made a CWM backup (although of course I hope not to use it).
My question is - should I format the system partition (from CWM, Mounts & Storage option) before flashing the new rom?
I've seen people say emphatically that to get a clean install you need to do this.
Yet I've seen other's write just as insistently that you should NOT format the system partition. Do they say this because it is too dangerous? If I format the system partition and then for some reason the new rom won't load, does that mean my CWM is wiped out, making it difficult to recover?
I think I do want the system format because I don't want a bunch of old files hanging around ... but I want to make sure this is not too dangerous.
I've also seen others who recommended also formating the boot partition. Is there any value in that? Sounds even more dangerous ... no?
~Paul

pmennen said:
I'm getting ready to update my old ParanoidAndroid (with CWM v5.5.0.4) with the CarbonRom.
I've backed up all kinds of logs, settings, and data that I think I may want to restore with the new rom.
I've also made a CWM backup (although of course I hope not to use it).
My question is - should I format the system partition (from CWM, Mounts & Storage option) before flashing the new rom?
I've seen people say emphatically that to get a clean install you need to do this.
Yet I've seen other's write just as insistently that you should NOT format the system partition. Do they say this because it is too dangerous? If I format the system partition and then for some reason the new rom won't load, does that mean my CWM is wiped out, making it difficult to recover?
I think I do want the system format because I don't want a bunch of old files hanging around ... but I want to make sure this is not too dangerous.
I've also seen others who recommended also formating the boot partition. Is there any value in that? Sounds even more dangerous ... no?
~Paul
Click to expand...
Click to collapse
You can format system,data, internal storage and cache without any worries if you are on PA rom read install instructions in carbon rom thread after or before.
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