Re: [Gumstix-users] Re ducing / Splitting the Root File System

[Mark Y. <may...@ya...>]

Tom,

Thanks! I have this working now. I've partitioned my 2GB uSD with a vfat and a ext3 partition. I put the rootfs in the larger ext3. Seems to be working fine. The only major snag was that I had to update my u-boot. The one that came with my Verdex MB didn't detect the uSD (as mmc). I've moved up to the u-boot that's built with buildroot-1566.

Does anyone know why the ramdisk.img file is so large? What's in there? If it were smaller I could shrink my vfat partition down and make use of the space in my ext3 partition.

- Mark

----- Original Message ----
From: Tom Hoffman <hof...@gm...>
To: gum...@li...
Sent: Monday, January 21, 2008 6:35:57 PM
Subject: Re: [Gumstix-users] Re ducing / Splitting the Root File System



Another approach would be to use the initramfs method to move the
 entire root
file system to the SD card.  


Dave Hylands wrote:
> 
> Hi Mark,
> 
>> I'm guessing there must be a way to change the buildroot so that a
 part
>> of
>> the rootfs could be split into a second image (outside of .jffs2)
 but I
>> haven't been able to find any discussion on how to do this. Part of
 /usr
>> would be seem to be a good candidate to place on a secondary device.
 Is
>> there a standard way to do this sort of thing?
> 
> I don't know if there's a "standard" way, but you could modify things
> just before the jffs2 image is created.
> 
> So build things the standard way, then move the
> gumstix-buildroot/root/usr tree (or whatever portion of the tree
 you'd
> like to move) outside of the root directory, and create a symlink to
> point to it.
> 
> cd gumstix-buildroot/build_arm_nofpu/root
> mv usr ../root-usr
> ln -s ../root-usr usr
> cd ../..
> rm rootfs.arm_nofpu.jffs2
> make
> 
> Now you'll get a jffs2 image that has a symlink.
> 
> The first time you boot up your gumstix (I'm hoping it still boots -
 I
> haven't actually tested this), fix up the usr symlink to be what it
> should be.
> 
> You could also modify the makefiles for particular packages to put
 use
> some new variable instead of TARGET_DIR (which points to
> build_arm_nofpu/root) to get your files moved.
> 
> -- 
> Dave Hylands
> Vancouver, BC, Canada
> http://www.DaveHylands.com/
> 
>
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