Use the following command to add a column to a volume, and grow the volume while doing this:
# vaxassist -g exdg add column vol1 layout=grow
Use the following command to add four columns to a volume, and grow the volume while doing this:
# vaxassist -g exdg add column vol1 ncols=4 layout=grow
Use the following command to add a column, but do not grow the volume:
# vaxassist -g exdg add column vol1 layout=nogrow
Use the following command to remove a column, and shrink the volume while doing this:
# vaxassist -g exdg remove column vol1 layout=shrink
Use the following command to remove a column, but do not shrink the volume:
# vaxassist -g exdg remove column vol1 layout=noshrink