Thank you Jeff,
I tried to do as you said, but I always get the same error message mounting my usb pen-drive:

DebianUM:~# mount -t vfat /dev/ubdc1 /mnt/pendrive
mount: special device /dev/ubdc1 does not exist



2006/11/5, Jeff Dike <jdike@addtoit.com>:
> DebianUM:~# mount /mnt/cdrom/
> mount: /dev/ubd2 is not a valid block device

You didn't define ubd2, so it doesn't exist.

How can I create it???

Here's my /etc/fstab :

DebianUM:~# cat /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/ubd0   /    ext3  defaults 0 0
/dev/ubd1   none swap  sw       0 0
/dev/ubd2   /mnt/cdrom iso9660 user,noauto,ro 0 0

Thanks ..

Flavio