[ptxdist] Ext2 root file system above 4GB

[ptxdist] Ext2 root file system above 4GB

[Danny]

Hi All,

Our system platform is recently upgraded. Before the upgrade we were using 
a 1GB flash disk with 2 partitions of 400MB each (double partition for 
software upgrades). The new platform has a 16GB disk and it would be nice 
if we could increase the 400MB partitions to 6GB.

This is easy to configure in PTXdist using the configuration (image 
creation -- generate images/root.ext2 and generate images/hd.img). The 
root.ext2 size is increased to 6GB (6.291.456 bytes). The hd image 
partitions are changed to fit the double partitions.

Creating the 6GB image is causing some problems. The first issue is the 
inodes from ext2. The first error is "Creating root.ext2 ....... sysroot-
host/bin/genext2fs: couldn't allocate an inode (no free inode)". After 
forcing more inodes the following error is seen: "Running e2fsck on 
root.ext2...make: *** [images/root.ext2] Error 1". The image seems 
corrupted.

The creation of the partition seems to work fine up to 4GB. A few MB after 
this the image creation fails. Searching the internet got me to the 
following patch for genext2fs: 
http://sourceforge.net/p/genext2fs/mailman/message/29050966/

Does someone have the same issues?? Is patching the genext2fs the correct 
solution?

Thanks,
Danny


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Re: [ptxdist] Ext2 root file system above 4GB

[Michael Olbrich]

Hi,

On Tue, Dec 02, 2014 at 12:38:37PM +0000, Danny wrote:
> Our system platform is recently upgraded. Before the upgrade we were using 
> a 1GB flash disk with 2 partitions of 400MB each (double partition for 
> software upgrades). The new platform has a 16GB disk and it would be nice 
> if we could increase the 400MB partitions to 6GB.
> 
> This is easy to configure in PTXdist using the configuration (image 
> creation -- generate images/root.ext2 and generate images/hd.img). The 
> root.ext2 size is increased to 6GB (6.291.456 bytes). The hd image 
> partitions are changed to fit the double partitions.
> 
> Creating the 6GB image is causing some problems. The first issue is the 
> inodes from ext2. The first error is "Creating root.ext2 ....... sysroot-
> host/bin/genext2fs: couldn't allocate an inode (no free inode)". After 
> forcing more inodes the following error is seen: "Running e2fsck on 
> root.ext2...make: *** [images/root.ext2] Error 1". The image seems 
> corrupted.
> 
> The creation of the partition seems to work fine up to 4GB. A few MB after 
> this the image creation fails. Searching the internet got me to the 
> following patch for genext2fs: 
> http://sourceforge.net/p/genext2fs/mailman/message/29050966/
> 
> Does someone have the same issues?? Is patching the genext2fs the correct 
> solution?

I don't know these patches, so I cannot comment on any possible issues.

I don't think there is another solution right now. Future versions of
mke2fs will support creating filesystems with content. I don't know when
this will be available though.

Michael

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