Quoting Manuel Bouyer (bouyer@antioche.eu.org):
> On Mon, Apr 14, 2003 at 02:09:39PM -0700, Caffeinate The World wrote:
> > I have two disks sd0 and sd1. I want to make a RAID1 from both for /,
> > swap, /usr, and /var:
> > 
> > Partition     Mount
> > a             /
> > b             swap
...
I've not found much gain in mirroring SWAP.  Only in HA
setups where a reboot (because of bad swap) would cost lots
of money.  In general, on most machines, if a disk goes bad,
and you lose a swap disk, you can afford a reboot. YMMV.