Jack Malmostoso wrote: > I set it up during the installation as the /dev/md1 RAID-1 device, ... > nostromo:~# mkswap -c /dev/sda2 > nostromo:~# swapon /dev/sda2 > swapon: /dev/sda2: Invalid argument Possibly, because you should have used /dev/md1 ? Works here: anthony@feynman:~$ cat /proc/swaps Filename Type Size Used Priority /dev/md1 partition 3903672 1180 -1