Bug#330093: USB boot on ASUS P5WD2 Premium fails to find ISO image

[debian@good-with-numbers.com]

On Tue, Sep 27, 2005 at 11:52:51PM +0200, Frans Pop wrote:
> you should probably check that the USB drivers for your 
> hardware are loaded.
> This should be: usbcore, {e|o|u}hci_hcd, scsi_mod, sd_mod, usb_storage

usbcore and uhci_hcd are loaded on boot.  I added usb_storage in the
"Scan hard drives for an installer ISO image" step.  usb_storage
loaded scsi_mod.  Needed "insmod sd_mod" to get that--wasn't an option
in the termcap UI.

> Next you should check if there is a device pointing to your USB stick. 
> This should be /dev/disks/disc[0-9]/...
> See if you can mount the USB stick manualy (or maybe it is already 
> mounted?).

There is only a /dev/discs/disc0/disc under /dev/discs, and when I try
to mount it, I get "Mounting /dev/discs/disc0/disc on /mnt failed:
Invalid argument".  In syslog:

 kernel: Unable to load NLS charset cp437
 kernel: FAT: codepage cp437 not found

It is verily a VFAT-formatted device, since I copied boot.img onto it.
Is this causing the ISO scan to fail?  It appears in syslog at that
time as well.