Ext4 (on sdcard) for OpenZio

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As I seem to be repeatedly losing files (including my entire music library, recently), and I am tired of it taking so long to recognize new files that I put on the sdcard via USB; I am starting this thread in hopes of starting efforts to get ext4 support included (or patched to) the OpenZio rom.

I apologize, Spz0, if I am stepping on any toes. Just thought this should be a separate thread from the main build thread.

--Reasons for using Ext4:
1. Native Linux filesystem. Mounts instantaneously, reducing boot time.
2. Journaled filesystem. Corrupt / lost files virtually eliminated.
3. Major performance improvements over Fat32.
4. Large file support (not my thing, but some people want it)

--Problem(s) with Ext4 on sdcard:
1. Unable to natively read card with Windows.
(still able to mount via USB to phone)
2. Permissions may be difficult to work out.

Any thoughts?

From what I gather in my searches, the following will need to be done to accomplish this:

1. Kernel module (ext4.ko) needs to be installed.
2. Appropriate libraries also need to be installed.
3. init.rc needs to have mount options changed.
4. Permissions issues need to be addressed.

Id love to see ext4 support but that lies within the kernel

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It isn't a monolithic kernel is it? If not, modules can be inserted on the fly

Sent from my Zio using XDA App

A what now?

Sent from my Kyocera Zio M6000 using XDA Premium App

before i switched over to openzio rom i ran ext3 on my sdcard, but did not try ext4. now my linux machine is dead and gone i have not tried either with openzio. with ext3 i did notice a small increase of speed, but never benchmarked to see how much.

Ext4 performs substanially better than ext3. The biggest improvement with ext3 was adding journaling support.

As for inserting kernel module on the fly, I am speaking as a Linux admin. I can't really speak about the Android kernel in particular. Typically linux kernels are dynamic, and allow for inserting of kernel modules as needed. Alternatively, kernels can be compiled as monolithic (or static), meaning that all required modules are compiled into the kernel.

I believe the required module is ext4.ko. I also read that there are some required libraries as well.

Well with android our kernel lies within our boot image. I'm sure ext4 can be added it's just a matter of taking the boot.img apart and adding ext4.ko then rebuilding the image and flashing it to the boot partition of the phone.

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As my car is in the shop, and I can't work (contractor that travels to jobs with a ton of tools), I may get more motivated to look into this more.

BTW, loosing my entire music library wasn't due to the filesystem, it was an ID10T error. I accidentally put one of my other SD cards in my phone, then proceeded to run over my 16GB card with my chair. Oh well, I think it was a class 4. Getting a class 10 card tomorrow.

You'd have to hit up Adrynalyne for a kernel update.
Havent seen him around for months.
I won't be using ext4 for my ROM. Perhaps someone else who develops a ROM for the Zio may, but I just dont have the time right now, and the Zio is pretty maxed out as it is with all the work we've done on it thusfar.
A better more viable option would be to get someone to build CM6 for you all, so the zio can somewhat stay on the learning curve. This phone is getting a touch old with all the newer cricket phones that are coming on the market now. Unfortunately I dont (and havent) seen any new devs capable of producing CM6 hit the forums with a zio lately... But, you never know..


Good Luck!