swap question

I have a Gentoo host, and have a swap file identified by my fstab as:

# /etc/fstab: static file system information.
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/fstab,v 1.12 2003/03/11 02:50:53 azarah Exp $
#
# noatime turns of atimes for increased performance (atimes normally aren't
# needed; notail increases performance of ReiserFS (at the expense of storage
# efficiency).  It's safe to drop the noatime options if you want and to
# switch between notail and tail freely.

# <fs><mountpoint><type><opts><dump pass=""># NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
/dev/ubd/0              /               ext3            defaults                0 0
/dev/ubd/1              none            swap            sw                      0 0</dump></opts></type></mountpoint></fs> 

today when I re-booted, I got a memory related to this swap location.

Should I be concerned?

* Activating (possibly) more swap ...swapon: cannot stat /dev/ubd/1: No such file or directory
                                    [ !! ]