save-nand problem

[Mitch Bradley]

Kim Quirk wrote:
> Hi Juliano,
> I just went through this process myself last night.
>
> The first time I did a save-nand it took many minutes. Unfortunately I 
> had to do it again since I missed a few things. The second time it 
> took many hours. It did complete (which surprised me).

I tried it a couple of times.  On a system with a nearly-pristine NAND 
image (200+ MB), the process took about 16 minutes.  I tried it twice 
and go similar results both times.  The USB device is a Verbatim 1 GB 
USB 2.0 FLASH key.  Prior to the test, I recreated the partition map by 
using fdisk to delete the existing partition and to create a new on of 
type 0x0c (FAT 32) of maximum size.  Then I inserted the key into a 
Windows XP system and formatted it as FAT32.

I was using q2c26x, which is my latest experimental firmware.  I don't 
it has any differences from q2c23 that would affect save-nand.

If your USB disk were being detected as USB 1.1 instead of USB 2.0, that 
would cause extreme slowness.

>
> The next step, which is new since 406, is that you also have to create 
> a .crc file.
> Scroll to the bottom of this page:
> http://wiki.laptop.org/go/Customizing_NAND_images 
> <http://wiki.laptop.org/go/Customizing_NAND_images>
>
> I had to get someone to build the crc for me since I didn't have a 
> build environment. I tried to upload the crcimg program that runs on a 
> linux machine, but I had some issues with the wiki upload. I had to 
> give it an extension. If you have access to a linux machine you may be 
> able to create your own crc file with this: 
> http://wiki.laptop.org/go/Image:Crcimg.sh
>
> Tell me if it works and we can add the link directly to wiki page. If 
> someone creates a version that can run on a mac or on windows it would 
> be great to upload them here so those of us without build environments 
> could create crc files for custom images
> Regards,
> Kim
>
>
> On 9/7/07, *Juliano Bittencourt* <juliano at lec.ufrgs.br 
> <mailto:juliano at lec.ufrgs.br>> wrote:
>
>
>
>         Hi folks,
>
>         I'm having problems using the save-nand OFW command to created a
>     customized version of the OS. In the near past I used this command
>     several times for this purpose, but now, it seems not working
>     anymore.
>         There are several symptoms:
>
>          1. When I try to create the image file with the command
>     'save-nand
>     disk:\nand.os', the laptop starts working but the entire process takes
>     serveral hours to complete (about 5 hours)
>          2. Even when the process completes successfully, eventually the
>     result is a 0 bites file;
>          3. When the process is completed and the resulting file has about
>     230mb, the problem is when I try to copy this file to a new
>     laptop. The
>     copy-nand command throws and error message : "Image file size is not a
>     multiple of the NAND erase block size".
>
>          I repeated the process serveral times, on B2 and B3 machines with
>     firmware q2c23. Am I missing something or is this actually a bug?
>
>          Best,
>
>          Juliano Bittencourt
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