creating extra swap partitions

[Eric Fielding]

what does one have to do to create a second swap partition on a second disk
drive (in addition to the default b on the system disk)?  I tried changing the
partition size with 'chpt' of my /dev/rrz3b partition and entering it into my
/etc/fstab as a swap partition, but "swapon -a" complains that it must be a
block device. This happens with or without running 'mkfs' on that partition.
Is there some other program to run to create a "block device" for swapping?
Do you have to specify the swap partitions in the kernal configuration?
(Oh, in case it makes any difference this is Ultrix 3.0 on a PMAX.)

				++Eric Fielding
eric at jasper.tn.cornell.edu