Rafal Boni writes:
> Sounds like you got the tough parts right... Make sure that your
> sd1b partition is of type swap in the disklabel, as otherwise I
> believe the system refuses to swap to it.

Aha!  That's it - it was 4.2BSD.  `disklabel -r -e sd1` did the trick.
Thanks very much!
--
Bob Sutterfield                         +1 909 794 1151
Mission Aviation Fellowship / MAFlink Technical Manager
mailto:Bob@XC.Org                 http://www.XC.Org/bob
             Pray Globally - Serve Locally