I just verified that swapon -a does nothing. So Pim must have something in his fstab that he omitted to mention in mp3tofid (or that I couldn't see).

As far as I can see, adding the swap lines (for both partitions - 1 on each disk) to fstab won't change anything until swapon -a is used, which will turn on swap for both partitions and then swapoff -a will do the reverse, but it won't affect normal running, It just allows a simple method to turn on all swap (and off).

Any reason therefore not to add them to fstab?