thanks santa but i dont have a clue about partitions etc.
i cant get my usb stick to work now here is the output from telnet
[SifTeam]$ cd /tmp
[SifTeam]$ mount #
rootfs on / type rootfs (rw)
/dev/root on / type squashfs (ro)
none on /tmp type tmpfs (rw)
none on /dev type tmpfs (rw)
none on /mnt type tmpfs (rw)
/dev/mtdblock4 on /var type jffs2 (rw)
none on /tmp/mqueue type mqueue (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw)
tmpfs on /dev/shm type tmpfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)
[SifTeam]$ umount /dev/sda1
umount: can't umount /dev/sda1: Invalid argument
[SifTeam]$