USB Mass Storage Device with HPS Stack

[Hans Petter Selasky]

On Friday 25 April 2008, Xiaofan Chen wrote:
> I've got a free USB flash disk from National Semiconductor. It may
> be the so-called U3 device since it comes up as a CDROM and
> a removable USB drive. The removable USB drive part works fine.
> But I am not able to mount the CD part which contains some datasheets
> from National Semiconductor. Any tips on this?
>

Hi,

The following line indicates that the software on the USB device was not ready 
at the moment the CD-ROM size was queried.

> cd0: Attempt to query device size failed: NOT READY, Medium not present

Try:

cat /dev/null > /dev/cd0

Then try to mount again. You can also try loading ata-usb instead of umass. 
ata-usb will query the disk size regularly.

--HPS