Bug#607879: System hangs up with mmap.c:873!

[Timo Juhani Lindfors <timo.lindfors@iki.fi>]

Ronny Standtke <Ronny.Standtke@gmx.net> writes:
> Just boot the DVD in your home machine, the installer starts up automatically 
> and makes producing a Debian Live USB flash drive a breeze. Then you can test 
> on any machine that can boot from USB.

Well I don't have any DVDs and the cdrom drive is not easily
accessible. I tried booting

http://www.imedias.ch/dateien/lernstick-testversion/lernstick_debian5_2010-11-09.iso

with xen configuration

name = 'lernstick'
vcpus = '1'
memory = '1024'
kernel = '/usr/lib/xen/boot/hvmloader'
builder = 'hvm'
device_model='/usr/lib/xen/bin/qemu-dm'
disk = [ 'file:/local/xen/lernstick/lernstick_debian5_2010-11-09.iso,hdc:cdrom,r',
         'file:/local/xen/lernstick/usb.img,hda,w' ]
vif = [ 'bridge=eth0,mac=52:54:00:12:35:11' ]
vnc=1
vnclisten='0.0.0.0'
vncdisplay=22
vncpasswd='secret'
keymap='sv'
usbdevice='tablet'
localtime=1
boot = 'd'

but it gives me an error message in german and does not let me
copy&paste it :-) It seems to not recognize my empty usb.img as an usb
stick.

I tried creating partition with fdisk and filesystem with mkfs.vfat
but it still can't recognize it as an usb stick.