Database Users

Speed Fix?

Any chance of bringing this speed fix by mimocan to the Captivate?
Supposedly some international version Galaxy S'ers are sitting pretty with 1700's Quadrant scores because of this fix among other firmware flashes, etc.
Can we replicate this for the Captivate?
Here's a little inspiration:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

"I have made a custom kernel to mount an ext3 partition on the sdcard at the boot time."
Can't make a custom kernel without source... and there is no source out yet... or even a stock firmware.

designgears said:
"I have made a custom kernel to mount an ext3 partition on the sdcard at the boot time."
Can't make a custom kernel without source... and there is no source out yet... or even a stock firmware.
Click to expand...
Click to collapse
Isn't the stock firmware in this? http://forum.xda-developers.com/showthread.php?t=731989
I've compiled kernels for linux before on my own PCs, and from what I can tell, he's just added ext3/ext4 support and customized the init.rc to mount the partition at boot time. I should dig around and see what I can find.

MANG~
I will worship the ground you walk if you can get this to work on Captivate.
I bricked my phone many times trying to make this work. Apparently when mimocan's kernel installed, external sd card can not be detectect and g sense will be off 90 degrees. however, all buttons do what they are suppose to do.
Anyways, please please help with this MOD. Alot of us Captivate owners are looking for this fix.

You will be my new hero if you get this working on the captivate.

sl8125 said:
MANG~
I will worship the ground you walk if you can get this to work on Captivate.
I bricked my phone many times trying to make this work. Apparently when mimocan's kernel installed, external sd card can not be detectect and g sense will be off 90 degrees. however, all buttons do what they are suppose to do.
Anyways, please please help with this MOD. Alot of us Captivate owners are looking for this fix.
Click to expand...
Click to collapse
You ain't kidding either! That fix is the [email protected]! I've finally gotten my Captivate to run decently with LauncherPro but it's that nothing compared to what it could do with this fix. It's a shame really, we have KILLER hardware and the software implementation has seriously crippled it.

designgears already posted the stock firmware... no? Twenty bucks to anyone who can get my captivate up to these benchmark scores.
Koush posted up the stock kernel too.
Sent from my Samsung Captivate using XDA app

I'd donate $20 as well.

im in for 20$ for a fix, even using SetCPU to 1000mhz whenever the screen is on I still get little stutters that feel like memory read issues, buddy was just over with his froyo nexus 1 and it was amazingly fast.
20$ is cheaper than the 35$ return see

I am in. I love to see happen. $$s for your time and bro.

Holy CHIT!
Ck this vid out. Its running the Mimocan Fix.
I need a FIX now. Come on man gotta do this.
http://www.youtube.com/watch?v=_b363eq0dXY&feature=related
http://www.youtube.com/watch?v=AjJdT-tlHOY

Well..... I just drooled all over my keyboard..... Anyone out there want to take a stab??? PLEASE!!!!

Hopefully that won't take much get running for us
Sent from my SAMSUNG-SGH-I897 using XDA App

I'm not a baller like some of you, but I would give 10 dollars to whoever makes this work with the captivate and maybe makes a vid on how to do it.

Don't worry it will come around.
Sent from my Nexus One using XDA App

it appears ext2/3 are already supported...
On my stock Captivate kernel /proc/filesystems shows ext2 and ext3 are already supported. Only boot scripts should need to be changed to use them. Also interesting, cramfs and romfs are supported but unused.

I tried this fix with ext3 and ext4, it didn't work just a black screen. Check this reply i posted to see my steps
vietphunguyen said:
Yep Ext4 nor Ext3 works on Captivate, it just goes to Black screen, Here are my steps below:
1.) Rooted Captivate
2.) Installed Busybox
3.) Made GParted ISO, booted computer up with GParted, Made the FAT32 2.5GB and EXT3/4 1.5GB (no labels and I have a 4GB SD)
4.) Put phone into Download mode (cmd: adb reboot recovery)
6.) Selected the v3/v4 for PDA, successfully worked, phone rebooted up fine
5.) adb shell, su, ran "mount -o remount,rw rootfs /" to mount the ext3/4 file system as writeable
6.) Ran the busybox commands (listed on main post of this thread)
7.) rebooted and it went to the Samsung Galaxy i9000 screen, then the 3g/att animation, then the galaxy S loading screen, then it turned black, when i tried ext3 and ext4,
8.) Cries, hoping someone finds a fix for captivate
Click to expand...
Click to collapse

in that case, anyone care to try the i9000 bootscripts with our kernel?

Kagoshema said:
in that case, anyone care to try the i9000 bootscripts with our kernel?
Click to expand...
Click to collapse
how is this done? new to this. i'll give it a try.

Good luck with that. I hope it works for you. We really need this fix until Samsung can fix the "bottle neck" but that probably wont happen until froyo is ready.

[HOW TO] An easy way to fastboot to enable Swap

There is a lot of way to fastboot the fjfalcons' boot.img
But i will explain the simplest way for me.
I figure after that the soft i m using to fastboot is in french only... So sorry for the others but you just have 2click you have to do in this soft so even in french, everybody can make it...
1. Installation of EasyAdbTool
So first you have to download and install this small soft: EasyAdbTool
It simplify the process to use adb (Android Debug Bridge) to communicate between the PC and the Android Phone.
When EasyAdbTool is installed you have to extract the archive EasyAdbToolXDAPack I attached to this post in the folder where you installed the soft (c:\program files\easyadbtool )
(it contains the boot.img from fjfalcons and the fastboot script i take in the android sdk. We are putting all in the root of the folder app so you don t have to move in the folder to lauch it)
2. Fastboot
Now you just have to plug you phone (in USB debogging mode without it can t work).
Launch EasyAdbTool you will have this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
You click on the first button I circle (in the top left) : "Redémarrer en Bootloader" that s mean: " reboot in bootloader mode"
Your phone reboot in bootloader.
Now you have to click the second button circle (in the bottom right) : "Taper ma propre commande" that s mean "enter my own cmd"
Now you will enter in the terminal.
Here all you have to do is to type:
fastboot boot boot.img
You press enter and that s it!
Your phone will reboot and you must have this in the terminal:
3. Thanks.... (just a joke...)

Russian users have made launch scripts with fastboot binary that boots it with one click.
Here it is

fjfalcon said:
Russian users have made launch scripts with fastboot binary that boots it with one click.
Here it is
Click to expand...
Click to collapse
404 could you attach man i would like to take a look at that one please

fjfalcon said:
Russian users have made launch scripts with fastboot binary that boots it with one click.
Here it is
Click to expand...
Click to collapse
404 too... Could you repost it?
But your app boot in one click from the bootloader??? (So it just lauch the fastboot boot.img) or you have to be in bootloader first?
My method is just 2 clicks... I can believe it s not the fastest method !!! (loool)

http://xt720.ru/Files/Tools/CustomCore3.rar

fjfalcon said:
http://xt720.ru/Files/Tools/CustomCore3.rar
Click to expand...
Click to collapse
I confess.... Faster than mine!
Thanks
Edit and in english (if someone wonder about)

Using easyadbtool
when I enter fastboot boot boot.img it says fastboot is not a recognized command. Anyone else had that issue?

Do u have the fastboot and boot.img save in your easyadb folder?
Sent from my MilestoneXT720 using XDA App

x2rust said:
Do u have the fastboot and boot.img save in your easyadb folder?
Sent from my MilestoneXT720 using XDA App
Click to expand...
Click to collapse
Yes it s in the archive i link
Just extract in the easyadbfolder and you re good to go

thanks a lot. works without a problem!

do i need to have a swap partition on the SD or an ext2 or ext3?? thanks

rugebiker said:
do i need to have a swap partition on the SD or an ext2 or ext3?? thanks
Click to expand...
Click to collapse
You need to have your partitions on your SD card set up in this order (FAT, Ext2or 3 or 4, then Swap)

Woodrube said:
You need to have your partitions on your SD card set up in this order (FAT, Ext2or 3 or 4, then Swap)
Click to expand...
Click to collapse
what sizes do you recommend for the ext and swap partition?

rugebiker said:
what sizes do you recommend for the ext and swap partition?
Click to expand...
Click to collapse
The ext partition is really up to you. I have had one about 500mb and really felt that it was too much and wasted space. My current is about 350mb. I have about 60+/- apps and it is only about half full. If you are jsut starting this, my suggestion is to split the difference and go with about 400mb and see how you like it. Might find that later on you need more or less and by then, you will have more of this stuff under your belt to make that decision based on your needs.
Swap on the other hand is debatable. Some say it should be twice as big as your RAM +1. So if your RAM is 256 the your swap should be 513mb (256+256+1). Others say that it is fine if at or around 90-100mb since it is really just an overflow for static RAM when you are running a heavy RAM hungry app.
Check out this thread http://forum.xda-developers.com/showthread.php?t=1219050
Also might want to check with B_E_N and LibertyMonger as they use swap quite a bit.

Woodrube said:
Swap on the other hand is debatable. Some say it should be twice as big as your RAM +1. So if your RAM is 256 the your swap should be 513mb (256+256+1). Others say that it is fine if at or around 90-100mb since it is really just an overflow for static RAM when you are running a heavy RAM hungry app.
Click to expand...
Click to collapse
Also note that the x2+1 is advice from old multi-user systems. If you're swapping that much on your phone, you might as well use an abacus IMHO.

Woodrube said:
The ext partition is really up to you. I have had one about 500mb and really felt that it was too much and wasted space. My current is about 350mb. I have about 60+/- apps and it is only about half full. If you are jsut starting this, my suggestion is to split the difference and go with about 400mb and see how you like it. Might find that later on you need more or less and by then, you will have more of this stuff under your belt to make that decision based on your needs.
Swap on the other hand is debatable. Some say it should be twice as big as your RAM +1. So if your RAM is 256 the your swap should be 513mb (256+256+1). Others say that it is fine if at or around 90-100mb since it is really just an overflow for static RAM when you are running a heavy RAM hungry app.
Check out this thread http://forum.xda-developers.com/showthread.php?t=1219050
Also might want to check with B_E_N and LibertyMonger as they use swap quite a bit.
Click to expand...
Click to collapse
I couldn t say better!
I haver 513mb of swap and 1gb of ext (i haver a 16 gb card so i don t care if i waste a little... )
But i recommand ext4 if your rom support it (just the last cyano 6.3 or the last hellmonger ones on the last news...) a lot faster...
Sent from my MilestoneXT720 using XDA App

Mioze7Ae said:
Also note that the x2+1 is advice from old multi-user systems. If you're swapping that much on your phone, you might as well use an abacus IMHO.
Click to expand...
Click to collapse
Haha. I have an abacus and swap and don't use either. Not really sure how to use the abacus but apparently it has worked for 1000's of years. i still do use my slide-rule though from time to time for some base calcs.

can somebody give me that one click fastboot fr russian? link down.

http://android.fjfalcon.com/xt720/Tools/CustomCore3.rar

linux user
linux users :
OR (openrecovery) on your phone needed
reboot your phone, chose "bootloader" ....your phone in few seconds is in fastboot mode
open a shell in your linuxbox:
[email protected]:~/Scrivania/Boots$ sudo ./fastboot boot boot2.img
downloading 'boot.img'... OKAY [ 0.286s]
booting... OKAY [ 3.740s]
finished. total time: 4.027s
you can get fastboot and boot*.img here
http://android.fjfalcon.com/xt720/Tools/
remember to change permission : chmod +x fastboot
if you have not OR you can use adb from shell : adb reboot-bootloader
thank you fjfalcon, thank you again .... ciao

More RAM on LG GT540(Swap)

Using Swap on LG GT540​
What is Swap ?
Code:
If I'm right, Swap is used to move UNused running programs from RAM to a file created in SD card or a swap partition
What method are we using ?
Code:
We will Swap by using [URL="http://adf.ly/4Hoa5"]SWAPPER[/URL]
Pros:
Code:
More Free RAM and faster response
SWAP will Fix "auto-close of some HD games while loading problem".
Cons:
Code:
Takes more time when switching between tasks (Depends on SD card speed)
How to use Swap ?
Code:
Simple just Download Swapper from [URL="http://adf.ly/4Hoa5"]HERE[/URL]
Run application and allow superuser permission
select the amount of MB's you want to swap I recommend 200MB
Select active on boot and click save
How to know if swap is working ?
Code:
In "Terminal Emulator" type free and it should be somthing like this
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
VERY IMPORTANT NOTE : It wont work on (SDSL3) because of some permission bug if someone got it worked just tell me.
List of games I used and worked after Swap:
Code:
GTA III (Never ran correctly before swap)
X-Formula (Never ran correctly before swap)
Worms (Never ran correctly before swap)
Gangstar 1 and 2 (worked at random times before swap)

i do recommend using a swap partition, more stable and with an easy script usable so no need for using swapper.

We can also check is swap working in setcpu. I dont recommend swap on stock sd card because phone is slower. Being ohnest swap is only usefull for games
Sent from my GT540 using Tapatalk

hey i made a thread about this last time time to bump it!!!

Hi,
I tried 'swapper for root' from the market before rooting my 'LG Optimus Pro C660'
no action happened !
I rooted my phone thanks to this great community !!!
Now i re-installed the 'swapper for root' and this time i saw some action, i created a swap size and checked the 'active on boot' and there was a small pop-up saying the swap file was being created.
I got so excited hoping that my 256MB RAM would now be less bothersome...
But alas! my excitement was short-lived ... a 'free' command on my terminal showed swap at 0-total 0-used 0-free
Can somebody help me implement swap successfully on my device
thanks,
aiamuzz.

aiamuzz said:
Hi,
I tried 'swapper for root' from the market before rooting my 'LG Optimus Pro C660'
no action happened !
I rooted my phone thanks to this great community !!!
Now i re-installed the 'swapper for root' and this time i saw some action, i created a swap size and checked the 'active on boot' and there was a small pop-up saying the swap file was being created.
I got so excited hoping that my 256MB RAM would now be less bothersome...
But alas! my excitement was short-lived ... a 'free' command on my terminal showed swap at 0-total 0-used 0-free
Can somebody help me implement swap successfully on my device
thanks,
aiamuzz.
Click to expand...
Click to collapse
Make sure you select the fat partition. Also, make the file smaller. Stay at 200 until it doesn't work, and roll back.
Sent from my LG GT540 Swift using Tapatalk

Thanks for looking into my post.
My research lead me into partitioning my SD card for a swap partition(instead of the swapfile method of 'swapper for root') and enabling swap on it through a shell script from here...
Auto Swap Partition
I was able to execute everything including
mkswap /dev/block/mmcblk0p1 ...
which resulted in the following response...
"Setting up swapspace version 1, size = 1733292032 bytes uuid=4e22c415-5500-48f9-8dc8-a93ebde7794e"
But the final command to implement swap...
swapon /dev/block/mmcblk0p1
resulted in the following error...
" swapon: /dev/block/mmcblk0p1: Function not implemented "
Which did not enable swap successfully !!!
I believe in the case of 'swapper for root' too the same command played the spoil sport.
swapon: /sdcard/swapfile.swp: Function not implemented.
Any Help to have swap enabled on my Android device 'LG Optimus ProC660' is most appreciated.
thanks,
aiamuzz

@up if you want swap on you other phone im sure it needs custom kernel

Thank you!

thanks ...........

[Dev] Pit file modification to change datafs partition size?

I recently made a tool to modify PIT file. (here)
my ultimate goal is the following:
1. remove or shrink to minimum the UMS(internal_sd) partition
2. mount my external sd as the internal sd
as a first step i made 3 modified pit files out of the original 16gb pit file
1. has no UMS partition
2. has 128mb ums partition
3. has 0mb ums partition
can you please tell me
1. if the structure of these files is corrupt(by my tool) or not (the original pit has rw flag set to 1 for datafs partition, is that normal?)
2. which one is the best to try
3. will flashing a wrong pit file hard brick my phone?
4. if this is just a crazy idea
and if everyhing (miracoulously) goes well:
5. how to mount external_sd as internal_sd
edit: http://forum.xda-developers.com/showpost.php?p=26285877&postcount=12
is it better to use the gparted method described in this thread?
edit2: i did a little searching and i found a init.d script that does the mounting for the s3 (no repartitioning needed)
here http://forum.xda-developers.com/showthread.php?t=1772234
i tried to tweak the script he provided to achieve the result i wanted (which is slightly different)
original author script
Code:
sleep 2
mount -o remount,rw /
mount -t vfat -o umask=0000 /dev/block/vold/179:49 /mnt/sdcard
original system mounts
Code:
/dev/block/vold/259:3 /mnt/sdcard
/dev/block/vold/179:9 /mnt/sdcard/external_sd
modified script:
Code:
sleep 2
mount -o remount,rw /
mount -t vfat -o umask=0000 /dev/block/vold/179:9 /mnt/sdcard
mount -t vfat -o umask=0000 /dev/block/vold/259:3 /mnt/sdcard/external_sd
i haven't tried this whole thing out yet, since i'm awaiting to get my 32gb card in the coming days.
and also i'm awaiting for positive feedback from experienced users especially over the partitioning part (the idea of bricking my phone scares the s**t out of me

first off, I dont have an n7k, I have the AT&T version the i717...
That being said, Im looking for something similar i think, but I dont know how to modify or even generate/retrieve the pit file for the i717's ICS release, OR, if like you ask, will it even work!
I know on my TF101 (Asus Tranformer), when I modified the partition layout with nvflash the bootloader refused to go anywhere when I outright removed a partition, however changing the size to zero let it work. That was the TF101 with nvflash, and this a Samsung with Odin, yes I know, but they where the ends to the means in getting the same desired result!
Back to the pit file mod: did you get your 32GB card and can report on the outcome of doing the mod (if you ended doing it yourself, how did you modify the pit file), did you make sure to modify the mount places in the kernel/rom (wherever it needs to be done) to get it to work properly?
How is my desire similar? I want the 16GB dedicated entierly to programs (and the files associated), I dont want a 2GB limit and I dont want to store anything on the phone itself, thats why I LOVE external memory! So I can always take my info elseware! (ex: to another phone), id even nix mounting internal for anything other then /data! Id finally get my MicroSD card to be mounted as /sdcard! (its annoying trying to move TB without having to modify the save location everytime I change ROM's... I want it on the SDCARD that >>I<< think should ACTUALLY be my SDCard!
Thats a bit of a rant post but Im basicly looking for an update because if it can be done on the n7k, i dont see why it cant be done on the i717 as well!
Thanks!~
EDIT: in my excitement, and on my mobile browser (on my TF101), i missed the link to the tool you made... will look into it as well as waiting for a reply...

Hammerfest said:
first off, I dont have an n7k, I have the AT&T version the i717...
That being said, Im looking for something similar i think, but I dont know how to modify or even generate/retrieve the pit file for the i717's ICS release, OR, if like you ask, will it even work!
I know on my TF101 (Asus Tranformer), when I modified the partition layout with nvflash the bootloader refused to go anywhere when I outright removed a partition, however changing the size to zero let it work. That was the TF101 with nvflash, and this a Samsung with Odin, yes I know, but they where the ends to the means in getting the same desired result!
Back to the pit file mod: did you get your 32GB card and can report on the outcome of doing the mod (if you ended doing it yourself, how did you modify the pit file), did you make sure to modify the mount places in the kernel/rom (wherever it needs to be done) to get it to work properly?
How is my desire similar? I want the 16GB dedicated entierly to programs (and the files associated), I dont want a 2GB limit and I dont want to store anything on the phone itself, thats why I LOVE external memory! So I can always take my info elseware! (ex: to another phone), id even nix mounting internal for anything other then /data! Id finally get my MicroSD card to be mounted as /sdcard! (its annoying trying to move TB without having to modify the save location everytime I change ROM's... I want it on the SDCARD that >>I<< think should ACTUALLY be my SDCard!
Thats a bit of a rant post but Im basicly looking for an update because if it can be done on the n7k, i dont see why it cant be done on the i717 as well!
Thanks!~
EDIT: in my excitement, and on my mobile browser (on my TF101), i missed the link to the tool you made... will look into it as well as waiting for a reply...
Click to expand...
Click to collapse
in fact after further reading it turns out that, for a sound system, it is way better and much easier safe to use parted
so in the coming days (maybe tonight) i will make a definite guide about the whole thing with parted, if possible there will be also a part about adding swap
stay tuned

i finally got my sdcard and the whole thing out and got it to work properly (yeah)
but it's two late in the night and i'm too tired now to write a proper guide
so stay tuned for tomorrow
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

well done..
Sent from my GT-N7000 using Tapatalk 2

Bien joué
Just got my 32 GB micro sd as well and was thinking I should look into doing something like that. Looking forward to your guide!

look here
i finally finished i guide
it's here http://forum.xda-developers.com/showthread.php?p=31579304#post31579304
your feedback is welcome

[Q] Nexus System Partition Size

Hi, I'm not sure if this is specifically a Nexus question or a general Android question but I have both a Nexus 4 and Nexus 7 and have observed the same behaviour on both
I have posted in the General section with nor response so now I'm posting on specific forums
Basically what's happening is when I delete stuff from the SDcard the free space seems to be allocated to the system partition WTF?!
Take a look at the screenshots I'm going to try a couple of things - one of the suggested things was clearing the data in the Google Services Framework data >> Settings - Apps - All - Google Services Framework - Clear Data - which freed up some of it but not all, the next thing from here for me would be to flash the factory images again and see what I start out with
Both devices are on CM10.1 if that helps, is anyone else is having the same issue??
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The discussion on Google+ http://goo.gl/lNyLW
Ok so this is my partition sizes now after flashing the factory images back onto my nexus 7. No where near 5GB anyone have any idea what's causing this?

I am guessing you have a couple of CWM back up? Maybe 3-4 of them? Maybe you tried to delete some of them?
Buggy CWM Recovery. Especially if you still hang on to the older versions. Mostly because the way CWM save the backup files.

KyraOfFire said:
I am guessing you have a couple of CWM back up? Maybe 3-4 of them? Maybe you tried to delete some of them?
Buggy CWM Recovery. Especially if you still hang on to the older versions. Mostly because the way CWM save the backup files.
Click to expand...
Click to collapse
I just use TiBU and DataSync now, stopped doing nandroids a while back now
Sent from my Nexus 7 using Tapatalk 2

It's not "system data" for sure. It's some apps with root permission saving its file to locations it shouldn't be doing.
Some how l still think it is CWM, even as you stopped using it in a distance past (which is like 1-2 months ago). I recommend flashing newest CWM and see if there're still old back up files.
If you still can't find anything, try this
bassmadrigal said:
If you are rooted and have adb set up on your computer, you can find out what folders are using the most space by using the commands below, then change into that directory and run the command again.
Code:
adb
su
cd /
du -hd 1
--find the largest folder and change directory (cd) into it - if you find you no longer want to continue in the folder you are in, you can cd .. to get to the previous folder or cd / to get back to the root of the filesystem--
Code:
cd large_folder
du -hd 1
rinse
repeat
????
profit
This will allow you to find what folders are using the most space and can eventually lead you to any large files and can then let you find out if you can delete them or if you need to keep them.
Click to expand...
Click to collapse

isnt this what they were saying was the reason for no SD card and use of MTP ?; basically if i recall correctly the nexus devices do not truly assign partitions instead there is a storage 'pool' that anything can use dynamically.
We got tired of seeing OEMs include many GB of internal storage for music, while users were still running out of space for apps and data. This approach lets us merge everything on one volume, which is way better.
-- Dan Morrill, Android engineer at Google
Click to expand...
Click to collapse
so i guess there is no partitions its just all 1 volume.
source: http://www.androidcentral.com/why-nexus-devices-have-no-sd-card

noobdeagle said:
isnt this what they were saying was the reason for no SD card and use of MTP ?; basically if i recall correctly the nexus devices do not truly assign partitions instead there is a storage 'pool' that anything can use dynamically.
so i guess there is no partitions its just all 1 volume.
source: http://www.androidcentral.com/why-nexus-devices-have-no-sd-card
Click to expand...
Click to collapse
I wish that was the case but it not, the space goes to the system partition and I cant access it on the sdcard