From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Mon, 3 Oct 2011 15:36:39 -0500
Subject: [U-Boot] U-Boot: using nand write to flash an ubi image,
 ubi part fails
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On 09/29/2011 10:44 PM, Lars Michael wrote:
> --- On Thu, 29/9/11, Matthew L. Creech <mlcreech@gmail.com> wrote:
>> 2. Use the "ubinize" tool to create an image suitable for
>> writing
>> directly to NAND.  This takes a UBIFS image and
>> "wraps" it to turn it
>> into a UBI image, which you can then use with "nand
>> write".
> 
> This is what I am doing (or plan to do). But to get it to work, I need
> the space fixup feature for the nand write in U-Boot. I got that feature in Linux, so in Linux it works. Unfortunately it is not easy to patch 
> that one in my 2009.08 U-Boot.

Try using a current U-Boot, and use "nand write.trimffs".

-Scott