mount ubi volume fails: No such device

[Artem Bityutskiy]

On Wed, 2011-02-09 at 04:34 -0800, Lars Michael wrote:
> I formatted and wrote the image again. ubiattach _sometimes_ completes
> without the error code -22. In this case the mount went ok. But mount
> sometimes fails completely (structure needs cleaning), other times
> errors are reported but successfully recovered. So it seems to work,
> but no in
> a reliable way. Any suggestions on how to improve it? My kernel is
> 2.6.29 so perhaps some patches are needed?

You really need to make the subpage test work. You can ask UBI to not
use sub-pages using the 'vid_hdr_offs' parameter of the 'ubi.ko' module.
I cannot tell you the exact value because you did not provide enough
information about your flash. Ideally, reporters should read these
instructions:

http://www.linux-mtd.infradead.org/doc/ubifs.html#L_how_send_bugreport
http://www.linux-mtd.infradead.org/doc/ubi.html#L_how_send_bugreport

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)