Develop Bugs

Too many a2sd a2sd+ app2sd, really confused...

I'm really confused, first with all the different a2sd variants and ones that are made by Darktremor or other people or the FroYo version. This is as much as I know for this app.
Secondly, I really couldn't find any information on doing partitions manually or setting ALL partitions to ext since I have a linux box, I really don't care to use windows to copy over files or whatever. I have a VMware box to do that on my windows machine anyways.
Third, the ClockworkMod recovery has NO options to do the partition following Darktremor's faq, and I don't know if I should install another recovery after flashing my hboot to 0.93 S-OFF (Alpha)
Mind you I only had my android for about 6 days and this is my first one, so learning curve is hard.
Please help

1) the names can be confusing but old apps2sd is an ext partition on your SD card that appears to the system as internal storage. Froyo apps2sd is using Froyo to transfer mapps to the fat32 partition (normal partition) of your SD card. You just need to use context because people tend to use apps2sd for both.
2) you can use gepart to partition. You need a fat32 partition for apps to write to and for any personal data because Android looks to that partition for that kind of data. I have my SD card as 5 gb fat32 and 3 gb ext3. Fat32 goes first.
3) go to ROM manager. Partition SD card. Choose size....there is only 3 sizes though.
If anything I wrote is wrong I'm sure I'll be corrected.

Sorry to hijack the thread, but since this is related to a2sd in general I might as well ask it here. What's the effect of having a2sd+ on your battery? Would it lower battery life due to cache and apps being stored mainly on SD instead of internal memory? I observed that this was often the case when I store always-on apps on SD back on my old Windows device.

So no way of not using a fat32 eh?
It still seems I don't have much space left after using the Rom manager way. I have 120meg free on internal mem.
Could I just format using linux mkfs? I want to make the apps partition about 2GB to hold more apps. Though it seems some widgets can't take putting on SD card, it dissipates.

BriEE said:
So no way of not using a fat32 eh?
It still seems I don't have much space left after using the Rom manager way. I have 120meg free on internal mem.
Could I just format using linux mkfs? I want to make the apps partition about 2GB to hold more apps. Though it seems some widgets can't take putting on SD card, it dissipates.
Click to expand...
Click to collapse
Widgets must be installed on internal storage, or they wont work.

If you want an easy method to make a ext 3 partition use ROM manager premium from the Market. It will make you automatically an ext3 partition with a maximum of 512 mb which is enough (put swap to 0). Just keep in mind that first inside ROM Manager you need to select the option Flash ClockworkMod Recovery, and after that go to the SD partition option otherwise it wont work. And also remember you need to have the PREMIUM version otherwise it might not work
Now if you want to have more than a 512 mb you can use gparted. It is a livecd which means that can work on linux, mac or windows just reboot with the cd inside and is quite straightforward to use. Hope this helps.

Hello guys, any thought about that issue maybe?
http://forum.xda-developers.com/showthread.php?t=816098

Partition bigger than 512mb? (for App2SD+)

Hey everyone!
I was wondering.. can you partition your SD Card so i have more than 512mb available for installing apps? because im one of those who LOVES to have alot of stuff on my phone :b I have all the GAMELOFT games etc, and they take up alot of space! Currently i have a 4gb SDcard, but im getting a 32gig.. so i was wondering.. can i get a 2gb partition? so i have 2gigs of available space for my apps??
Also.. can someone explain me about the SWAP, and those EXT, EXT 2, EXT 3, EXT 4 and pro's and con's? or just give me a link to it, because i just cant find it
Thanks in advance..
- Mathias

yes
you can use gparted live cd/live usb to format the card
one thing to note though, if you have 1gb ext partition be aware that some data is still kept on the data directory of the device there fore you will run out of intenal storage before you reach your a2sd+ limit

Rastaman-FB said:
yes
you can use gparted live cd/live usb to format the card
one thing to note though, if you have 1gb ext partition be aware that some data is still kept on the data directory of the device there fore you will run out of intenal storage before you reach your a2sd+ limit
Click to expand...
Click to collapse
Aww.. i thought i just could have "unlimited" apps, all i needed was a big enough SDcard? Is there any way i can transfer that data to the SDcard too?

using data2sd or data2whatever but its more complicated
search the dev forums for it.

Rastaman-FB said:
using data2sd or data2whatever but its more complicated
search the dev forums for it.
Click to expand...
Click to collapse
Even the alpharev clockworkmod can do the partitioning.
From another universe

droidzone said:
Even the alpharev clockworkmod can do the partitioning.
From another universe
Click to expand...
Click to collapse
But i need data2ext now

droidzone said:
Even the alpharev clockworkmod can do the partitioning.
From another universe
Click to expand...
Click to collapse
i have alpharev however if he doesnt have s-off flashing different recoveries would be more of an ass ache than just using gparted
i wont touch anything to do with clockwork recovery since 2.5.0.7 as thats the most stable one. anything after is problems

Rastaman-FB said:
i have alpharev however if he doesnt have s-off flashing different recoveries would be more of an ass ache than just using gparted
i wont touch anything to do with clockwork recovery since 2.5.0.7 as thats the most stable one. anything after is problems
Click to expand...
Click to collapse
I dont bother with CWM Partitioning either, since the moment one choose the partition option, the Fat32 is erased!

would it work to partition wid amonra then flash back to clockwork just to gain 1gb+ partition?

I myself have a 512 MB partition made using ROM manager. No hassle, no fuss. I'm already close to reaching low storage space warning.
My internal memory left is around 35MB while my A2SD has 57MB left. I have around 150 apps. Using Oxygen rom, froyo stable.
In my opinion, I think you should only make a 1GB partition if you use the HD sense roms. You will still run out of space in your internal memory before you even use half of your partition.
Its a hardware limitation of the Desire.

Ghettonine said:
would it work to partition wid amonra then flash back to clockwork just to gain 1gb+ partition?
Click to expand...
Click to collapse
why would you want to stay on cwm? amonra 2.0.1 is far superior imo
friedkimchi said:
I myself have a 512 MB partition made using ROM manager. No hassle, no fuss. I'm already close to reaching low storage space warning.
My internal memory left is around 35MB while my A2SD has 57MB left. I have around 150 apps. Using Oxygen rom, froyo stable.
In my opinion, I think you should only make a 1GB partition if you use the HD sense roms. You will still run out of space in your internal memory before you even use half of your partition.
Its a hardware limitation of the Desire.
Click to expand...
Click to collapse
this is why i mentioned earlier that if he wanted true ultd apps etc he would have to use the 1gb ext to go to data2sd instead

but ive heard that data2ext make you lag etc??

mathiasb2 said:
but ive heard that data2ext make you lag etc??
Click to expand...
Click to collapse
Read Sibere's Data2sd thread for that..No point discussing it here..

[Q] Pros and Cons of sd-ext?

Hi!
Just would like to know the pros and cons of formatting into ext4 on my SD.
As far as I can find :
Pros : Supports files larger than 4GB as Fat32 cannot
That's about it I think...
Cons : Windows cannot natively detect such a partition
Why I ask this is I just saw a this post
blahbl4hblah said:
Having sd-ext partition on your sdcard will always be benefical, the phone will run so much better believe me
Click to expand...
Click to collapse
I'm ready to go ext4 if there's any performance gain, who wouldn't? But what gain is there, and what would I lose in return?

ArmedandDangerous said:
Hi!
Just would like to know the pros and cons of formatting into ext4 on my SD.
As far as I can find :
Pros : Supports files larger than 4GB as Fat32 cannot
That's about it I think...
Cons : Windows cannot natively detect such a partition
Why I ask this is I just saw a this post
I'm ready to go ext4 if there's any performance gain, who wouldn't? But what gain is there, and what would I lose in return?
Click to expand...
Click to collapse
You're mixing things up here a bit I think. Sd-ext referrs to having a partition on your sdcard to allow support for Apps2SD (basically being able to move apps to your SD card and run them from there in order to free up space); you'd basically repartition the card so that there's an ext3/4 partition for apps and a FAT32 partition for data.
As for the ext4 filesystem, it does allow for larger file sizes and is also a bit faster but you're correct in the fact that you won't be able to natively mount it on a Windows system.
Sent from my T-Mobile G2 using XDA App

OriginalGabriel said:
You're mixing things up here a bit I think. Sd-ext referrs to having a partition on your sdcard to allow support for Apps2SD (basically being able to move apps to your SD card and run them from there in order to free up space); you'd basically repartition the card so that there's an ext3/4 partition for apps and a FAT32 partition for data.
As for the ext4 filesystem, it does allow for larger file sizes and is also a bit faster but you're correct in the fact that you won't be able to natively mount it on a Windows system.
Sent from my T-Mobile G2 using XDA App
Click to expand...
Click to collapse
But don't we already have Apps2SD in GB, + all the apps that do it for you. How is this different, apart from some apps that can't natively be moved? And why is it faster? Internal memory should always load faster, should it not?

ArmedandDangerous said:
But don't we already have Apps2SD in GB, + all the apps that do it for you. How is this different, apart from some apps that can't natively be moved? And why is it faster? Internal memory should always load faster, should it not?
Click to expand...
Click to collapse
GB has the ability to do Apps2SD but it requires the partitioning as, I believe, a symlink is set up so that partition on the sdcard acts as a part of the devices internal storage.
As for speed, just moving apps to your sdcard won't speed up your phone; what that poster you quoted was talking about (most likely, I'd have to see the original thread) was converting your devices partitions (/system, /data, /cache, etc.) from ext3 to ext4. ext4 is a bit faster however some ROMs do not fully support it.
Sent from my T-Mobile G2 using XDA App

Ok, let's clear this up. GB has Apps2FAT32 (a2sd) natively. A2EXT is completely different but none of that is the point of the OP's question.
When it comes to our phones - there is almost no notable performance gain when using EXT4 over any other EXT format. Our phones don't utilize FAT32 internally - just on the sdcard. EXT4 is designed for use with massive file systems. A couple Gigs really doesn't access it's full potential.
While the question is interesting, I'm not really sure what you're planning on doing. Don't format your sdcard entirely in EXT format, and don't attempt to format your phones partitions as FAT32. The result would be... just don't do it.

Just read this on the portal
http://www.xda-developers.com/andro...hd2-data-successfully-moved-to-ext-partition/
This has two main advantages: larger sized data partition and more speed as EXT is inherently faster for I/O purposes.
Click to expand...
Click to collapse
How do I go about formatting a section of my SD into ext4, with existing SD data intact.
And how do I move apps that area already in my phone's internal memory to the ext4 partition? I know there's an option in ROM Manager and CWM, but just don't want to mess anything up

ArmedandDangerous said:
Just read this on the portal
http://www.xda-developers.com/andro...hd2-data-successfully-moved-to-ext-partition/
How do I go about formatting a section of my SD into ext4, with existing SD data intact.
And how do I move apps that area already in my phone's internal memory to the ext4 partition? I know there's an option in ROM Manager and CWM, but just don't want to mess anything up
Click to expand...
Click to collapse
As far as I know, only two ROMs actually support the real A2SD: PyroMod and MexDroid. It's recommended you format the EXT partition to EXT4 before you actually flash either of those ROMs, and you have to rename MexDroid in order to get A2SD working.

blackknightavalon said:
As far as I know, only two ROMs actually support the real A2SD: PyroMod and MexDroid. It's recommended you format the EXT partition to EXT4 before you actually flash either of those ROMs, and you have to rename MexDroid in order to get A2SD working.
Click to expand...
Click to collapse
Thankfully I am already using meXdroid~ Guess I'll just wait for the new version in the next few days to do the formatting. Can I backup all my apps with Titanium Backup, flash ROM (wipe data/cache and dalvik cache), restore with Titanium.
Or would I have to reinstall every app again so that it goes into the ext4 partition?

blackknightavalon said:
As far as I know, only two ROMs actually support the real A2SD: PyroMod and MexDroid. It's recommended you format the EXT partition to EXT4 before you actually flash either of those ROMs, and you have to rename MexDroid in order to get A2SD working.
Click to expand...
Click to collapse
There's a script to accomplish this on pretty much any ROM. It *should* work on current ROMs too. It's called 'darktremor a2sd'. Still find it amazing people forget about that one when this question comes up because it's one oldest methods of obtaining a2sd.
I'm still not understanding the OP's question. Are you wanting to do this for an IO performance gain or for space? I can understand doing it for space if you have a ton of apps but if you're doing it for performance it's a waste of your time. You're internal partitions should already be in EXT4 format (use 4EXT Recovery if they're not).

KCRic said:
There's a script to accomplish this on pretty much any ROM. It *should* work on current ROMs too. It's called 'darktremor a2sd'. Still find it amazing people forget about that one when this question comes up because it's one oldest methods of obtaining a2sd.
I'm still not understanding the OP's question. Are you wanting to do this for an IO performance gain or for space? I can understand doing it for space if you have a ton of apps but if you're doing it for performance it's a waste of your time. You're internal partitions should already be in EXT4 format (use 4EXT Recovery if they're not).
Click to expand...
Click to collapse
I'm doing it for the performance. Have been using 4EXT for a few days and loving it. Already converted internal memory to ext4 from ext3. If further partitioning my SD card for performance is really not noticeable, then I guess I've got nothing to worry about

4EXT Recovery not formatting sd-ext?

Hi all,
having quite a few problems with 4EXT recovery, and it formatting my sd-ext partitions. I read quite a few thread on here about using 4EXT to correctly partition memory cards, and I recently (tried) upgrading my rather old 8Gb class 4 Transcend micro-sd to a Samsung 32Gb Class 10, and thought I'd do things properly.
I boot into the recovery, hit Tools, Partiton SD Card, hit the tick to say "I'm ok with it destroying my data" remove all partitions, select 1024Mb for first partition, and after that I've tried about 5 different combinations, including skipping both the second partition and the swap, trying two 1Gb partitions for SD-ext and no swap etc etc. It then prompts me to pick EXT3 or EXT4, and I always choose EXT4.
Everytime I do this however, the EXT partition is never formatted, despite it telling me it completed successfully. This means that when I install my rom (MIUI-XJ Data2EXT one) the rom will not boot as it has no EXT partition to write to (I'm presuming as I get no specific error).
Has anyone else had similar problems or can they point me in a direction where I might be going wrong?
Thanks in advance to anyone who can help shed some light on a user who is rapidly going grey here lol

Which recoveryversion do you use?
Sent from dGB using Transparent XDA App

I suggest you use the rmd recovery. when the recovery is booted it tells you what partitions you have on the sd card. other than that it is by far the best sd-card formatting recovery i have used. the only better option is gparted i think
i have had similar problems with 4ext and i am not using it anymore

There's no such generally known bug in 4ext. if you're facing issues, I suggest you contact Maximillian with logs. I haven't seen anyone with a greater passion for fixing things.. That's the way you contribute to development-by helping fix any issues.

hassand said:
I suggest you use the rmd recovery. when the recovery is booted it tells you what partitions you have on the sd card. other than that it is by far the best sd-card formatting recovery i have used. the only better option is gparted i think
i have had similar problems with 4ext and i am not using it anymore
Click to expand...
Click to collapse
RMD is crap. There is a huge bug whereby there are issues backing up .android_secure.
We identified this in the thread yet as far as we are aware, has not been addressed. It would be good if not for that bug.

MatDrOiD said:
Which recoveryversion do you use?
Sent from dGB using Transparent XDA App
Click to expand...
Click to collapse
I'm using 1.0.0.3 RC3 4EXT Recovery Touch
hassand said:
I suggest you use the rmd recovery. when the recovery is booted it tells you what partitions you have on the sd card. other than that it is by far the best sd-card formatting recovery i have used. the only better option is gparted i think
i have had similar problems with 4ext and i am not using it anymore
Click to expand...
Click to collapse
I'll see if this makes any difference. I did try and reinstall Clockwork Mod Recovery over 4EXT but for some reason it didn't work, and I still have 4EXT, but right now I'll try anything lol

Reno_79 said:
Hi all,
having quite a few problems with 4EXT recovery, and it formatting my sd-ext partitions. I read quite a few thread on here about using 4EXT to correctly partition memory cards, and I recently (tried) upgrading my rather old 8Gb class 4 Transcend micro-sd to a Samsung 32Gb Class 10, and thought I'd do things properly.
I boot into the recovery, hit Tools, Partiton SD Card, hit the tick to say "I'm ok with it destroying my data" remove all partitions, select 1024Mb for first partition, and after that I've tried about 5 different combinations, including skipping both the second partition and the swap, trying two 1Gb partitions for SD-ext and no swap etc etc. It then prompts me to pick EXT3 or EXT4, and I always choose EXT4.
Everytime I do this however, the EXT partition is never formatted, despite it telling me it completed successfully. This means that when I install my rom (MIUI-XJ Data2EXT one) the rom will not boot as it has no EXT partition to write to (I'm presuming as I get no specific error).
Has anyone else had similar problems or can they point me in a direction where I might be going wrong?
Thanks in advance to anyone who can help shed some light on a user who is rapidly going grey here lol
Click to expand...
Click to collapse
U can use Gparted to format your card from pc
Sent from my HTC Desire using XDA App

rootSU said:
RMD is crap. There is a huge bug whereby there are issues backing up .android_secure.
We identified this in the thread yet as far as we are aware, has not been addressed. It would be good if not for that bug.
Click to expand...
Click to collapse
for backup i use cwm
for partitioning, i have used it many times with 1 ext4 partition or 2 ext4 partitions and a swap and such, it has never failed yet. after i partition the card, i go back to cwm, so i have no experience with backups on rmd

Just for partitioning? How odd?! haha
RMD uses SDparted for partitioning so it does not correctly align the partition, which hinders performance.
Gparted is the best way. Not sure how 4EXT works for partitioning but apparently it does not use SDparted and DOES align. Whether thats by scripts or not I dont know.
Anyway Gparted is the best choice for partitioning

Just to check things out as I've read stories about mislabelled micro sd cards being sold before, I just performed a full surface scan on the card, came up clean. Just tried GParted... still no go.
Could there be a problem with the partition sizes I'm choosing?
Do I need 2 ext4 partitions? (I'm assuming yes as I have two on my 8Gb which was partitioned perfectly fine within Clockwork about a year ago; 1 of 1Gb and one of about 70Mb)
Any other software I can use to partition via the PC?

One fat, one EXT
Whats happening in Gparted?
Tell me exactly how you are setting up and what the problem is please.

rootSU said:
One fat, one EXT
Whats happening in Gparted?
Tell me exactly how you are setting up and what the problem is please.
Click to expand...
Click to collapse
That's what I thought, one of each.
Gparted says completed fine, but looking in 4EXT Recovery it still says my EXT4 is unformatted and I cannot install my rom

no idea then, other than removing all the partitions then create all from scratch.
Create Fat32 at desired size then format fat 32 as fat 32. Create EXT4 as desired size then format ext4 as ext 4...

Using Gparted you need a Fat32 partition (main partition) followed by an ext3 or ext4 partition (just 1-2gb) Make sure its Fat32 first though.
For some strange reason, possibly drivers, I had trouble with Gparted running through VMware, maybe try making an actually bootable CD or Usb stick. Worked for me.

Reno_79 said:
Just to check things out as I've read stories about mislabelled micro sd cards being sold before, I just performed a full surface scan on the card, came up clean. Just tried GParted... still no go.
Could there be a problem with the partition sizes I'm choosing?
Do I need 2 ext4 partitions? (I'm assuming yes as I have two on my 8Gb which was partitioned perfectly fine within Clockwork about a year ago; 1 of 1Gb and one of about 70Mb)
Any other software I can use to partition via the PC?
Click to expand...
Click to collapse
you can use PARTED MAGIC but its basically Gparted and Parted put together in 1gui.Some other useful tools in it as well.
Also it runs off the computer ram, which is better than a live cd

Well a little update:
I've managed to get ClockWork Mod back on the phone, and it seems my partitions are working correctly now. Just got a bootloop problem now, I'll get there eventually lol

Looks like it's a bad sd card, no matter what I try and do, even if the software I create the ext partition with say successful, once I get it onto my phone it's not there anymore. Will never buy an micro-sd from ebay again.

Reno_79 said:
Looks like it's a bad sd card, no matter what I try and do, even if the software I create the ext partition with say successful, once I get it onto my phone it's not there anymore. Will never buy an micro-sd from ebay again.
Click to expand...
Click to collapse
I wouldn't blame the SD card. The Desire is notoriously awkward where using 32Gb cards are concerned, indeed I'm sure it's been said that it only supports upto 16Gb cards though I suspect some may have gotten 32Gb cards to work. Similarly, class 10 cards are a bit hit and miss with the Desire. It's taken me a couple of attempts to get a working class 10 16Gb card and to be honest there's no noticable speed improvement over my class 4 8Gb and 4Gb cards.

Parva4 said:
I wouldn't blame the SD card. The Desire is notoriously awkward where using 32Gb cards are concerned, indeed I'm sure it's been said that it only supports upto 16Gb cards though I suspect some may have gotten 32Gb cards to work. Similarly, class 10 cards are a bit hit and miss with the Desire. It's taken me a couple of attempts to get a working class 10 16Gb card and to be honest there's no noticable speed improvement over my class 4 8Gb and 4Gb cards.
Click to expand...
Click to collapse
That a fair point, so I thought I'd test it in my mates Sensation XL and another's Galaxy SII (Why do all my friends have much newer, bigger phones than me? ) Anyway... long story short, same kinda problems, ebay seller has been shut down, paypal looking into getting me a refund and I've bought another Lexar 32Gb that was on sale at amazon. Should be the end of my problems, but thanks everyone for the help.

same issue here
Hi guys,
I have the same problem. I have 2 Different cards, 8 and 16GB all Class 10 - I tested them and they have the right speed and they seem to work just fine.
I boot a live Ubuntu 11.10 and run Gparted. I then format (the 8GB card) by the book (fat32 first and 1GB ext4 after, both primary partitions).
My 4EXT 1.0.0.4 RC3 doesn't see the partitioning of the SD Card.
If I format the card using 4EXT, I can install the roms and they run fine for a few days but then EACH ROM (I've tried prolly 10...) starts hanging, and when I turn the phone off, the ROM don't boot anymore... wiping cache + dalvik doesn't help at that point.
I start thinking my Desire has an hardware issue?
thanks

SD Partition on 32 GB card?

Hey guys,
I've searched around a lot but haven't found anything explicit to a 32 GB card's ideal partition table. I've read somewhere that the ext3 shouldn't be larger than 2 GB, is this really the case? Or is it device specific? And if thats the case, can the MT3G3 handle a larger than 2GB partition? Also, is there a point to having a swap partition? I know on Linux systems it helps with memory and the XDA SD partition guide mentions that we can have one if we wanted .. but is there a point to it?
My second question is ... should I get data2ext or a2ext? Or some other tool? The choice is pretty confusing, esp since it seems that some of them do the same thing?
I'm thinking about making the partitions equal between FAT32 and Ext3 (if swap won't make a difference).
PS - Its a Class 10 Sandisk card.

eMJaaay said:
Hey guys,
I've searched around a lot but haven't found anything explicit to a 32 GB card's ideal partition table. I've read somewhere that the ext3 shouldn't be larger than 2 GB, is this really the case? Or is it device specific? And if thats the case, can the MT3G3 handle a larger than 2GB partition? Also, is there a point to having a swap partition? I know on Linux systems it helps with memory and the XDA SD partition guide mentions that we can have one if we wanted .. but is there a point to it?
My second question is ... should I get data2ext or a2ext? Or some other tool? The choice is pretty confusing, esp since it seems that some of them do the same thing?
I'm thinking about making the partitions equal between FAT32 and Ext3 (if swap won't make a difference).
PS - Its a Class 10 Sandisk card.
Click to expand...
Click to collapse
don't know what a mt3gs works with, 32 should work but no larger I doubt. as for an ext partition there is no reason to make it smaller than internal memory and 2gb should be more than enough, I have never even used more than 1gb but 1~2gb should be the perfect point.
not sure if any of the roms here support ext4, if they do I would recomend that over ext3, it won't ware the card much fast (the extra journaling does but not much)
personaly kinux swap doesn't help much, not even on the g1 but give it a shot and see if it works for you, will help with multitasking
use apps2ext for sure, not data as it will be slow
Sent from my HTC Vision using xda premium

Thanks so much for the reply
I'll give this a go! I might as well have a swap partition as well since I have so much space should the swap be smaller than the ext3 partition? I'll also look into apps2ext .. but earlier came across int2ext in CronMod .. would that work?

eMJaaay said:
I'll give this a go! I might as well have a swap partition as well since I have so much space should the swap be smaller than the ext3 partition? I'll also look into apps2ext .. but earlier came across int2ext in CronMod .. would that work?
Click to expand...
Click to collapse
I'm not sure if creating swap on sd is supported on this device (at least, CM7). When I tried to partition SD using Rom Manager the device didn't see my ext partition if I selected swap partition size more than 0.
As for apps for managing ext partition usage, s2e app worked for me all right on CM9 and CM7. If you device is running CM9 you should be extra careful with such software. In example, Link2SD caused much trouble for me - constant app FC and I had to reinstall the system.
And be careful - it seems that s2e wipes ext partition at the first mount.
Sent from my T-Mobile myTouch 3G Slide using xda app-developers app

If im not mistaken, your kernel has to support using a swap partition.
Look into darktremors apps2sd. A. Lot of folks seemed to like that. It allows you to choose different setups if I remember right. (A2sd, data2sd, etc)
Data2sd would prob work ok since you have a class 10 card.
Also, if you are needing more space and are running a custom rom, look up mtd partitions in development forum.
Another nice trick is bind-mount data to cache.
Mt3gs does not support higher than 32gb. Ext4 support I think is available but only through kernels or scripts.
Hope that helps.
Sent from my SGH-T999 using xda app-developers app

Different ROMs support different a2sd scripts.....you will have to find a script compatible with your ROM.
I use A2SDGUI on my phone.
A swap partition acts a virtual ram for your phone if you run low on ram memory.Not required though.
Sent from my GT-S5570 using xda app-developers app

Thanks for the replies everyone
I'm running CM7.2 which has built in moving to SD but this hardly does anything :/ I've only got around 7 apps half of which I can't even update cos its running low on space :/
Quite a few partition articles / posts, etc mention ext3 no larger than 2 GB and a swap of 0 MB :/ I've got the CM kernel that came with the last stable release (in June this year) .. does that support swap? Is there even a point of adding a swap of 0 MB .. might as well not make a swap partition at all right? I'm partitioning using Gparted on my Linux! I think S2E supports that!
Seriously guys, thank you so so much for all your replies

Update: Link2SD didn't work. S2E worked on S-ON with a 28 ish GB FAT32 Primary Partition and a 2048 MB i.e 2 GB EXT4 partition.