running out of space dd'ing JFFS2 image to /dev/mtdblock/0

[Josh Boyer]

On Mon, 2005-01-31 at 10:14 -0500, Robert P. J. Day wrote:
>   just for curiosity's sake, after i build a JFFS2 image using
> mkfs.jffs2, i want to mount out to verify its contents.  to do that, i
> use a recipe i patched together a while back involving loading the
> appropriate modules, creating /dev/mtdblock/0, dd'ing the image to
> that device, then mounting it.
> 
>   however, this morning, in trying this with a larger-than-normal
> JFFS2 image, i get:
> 
>   # dd bs=4096 if=soefsimage of=/dev/mtdblock/0
>   # dd: writing `/dev/mtdblock/0': No space left on device
>   1025+0 records in
>   1024+0 records out
> 
> IOW, it dies after 4M.  is this a limit imposed by the ramdisk limit
> in the kernel configuration?  is this a configurable parameter at
> module load time?  thanks for any pointers.

If you are using mtdram.c, it should be a module parameter.  Try setting
total_size to something larger.

josh