The FreeBSD 5+ methods for disk management are all based on GEOM. The currently available modules include
gconcat(8),
gstripe(8),
gmirror(8),
graid3(8), and
gjournal(8), with a
graid5(8) module in development.
Things like ccd, vinum, and other things that don't start with g, are all deprecated and falling into the bit-rot pile.