A striped-mirror volume is an example of a layered volume that stripes several underlying mirror volumes. A striped-mirror volume requires space to be available on at least as many disks in the disk group as the number of columns multiplied by the number of mirrors in the volume.
# vxassist [-b] [-g diskgroup] make volume length \ layout=stripe-mirror [nmirror=number_of_mirrors] \ [ncol=number_of_columns] [stripewidth=size]
Specify the -b option if you want to make the volume immediately available for use.
By default, Veritas Volume Manager (VxVM) attempts to create the underlying volumes by mirroring subdisks rather than columns if the size of each column is greater than the value for the attribute stripe-mirror-col-split-trigger-pt that is defined in the vxassist defaults file.
If there are multiple subdisks per column, you can choose to mirror each subdisk individually instead of each column. To mirror at the subdisk level, specify the layout as stripe-mirror-sd rather than stripe-mirror. To mirror at the column level, specify the layout as stripe-mirror-col rather than stripe-mirror.