Read this link it's very simple on how to open and edit these partitions 

http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack%2C_Edit%2C_and_Re-Pack_Boot_Images

http://forum.xda-developers.com/archive/index.php/t-443994.html

www.YouTube.com/linuxboxsolution
www.Krzyview.com
www.Email-Marketers.com


On Jun 5, 2011, at 4:07 PM, hedwin <hedwin.kon...@gmail.com> wrote:

> Did you try yaffs2
> 
> On Sat, Jun 4, 2011 at 9:25 PM, Tony <crackeri...@gmail.com> wrote:
> Hello,
> 
> I'm new to android dev and learning how to port gingerbread to my
> samsung i9003.
> I successfully converted partitions on the phone from samsung's RFS
> to ext2.
> But I have a problem, I need to modify the file init.rc to change the
> mount option to ext2. but the file is in ramfs, and I need to modify
> its source.
> There are to .img file which I think init.rc is placed -
> normalboot.img and recover.img. I have no idea what type of these
> files are.
> But I open it in a hex editor and found that the very first byte of
> the file is a string "ANDROID".
> Could someone give me a hint what these file are and how can I open or
> extract(repack) it?
> Is it a type of file system?
> 
> Tony
> 
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