While creating a few Veritas volumes last week, I wanted to see the commands that vxassist was executing under the covers. This was easily accomplished by adding the "-v" (trace commands executed by vxassist) option to the vxassist command line:
$ vxassist -b -v make datavol02 1g layout=mirror mirror=3
/usr/sbin/vxvol -g datadg -o bg -o plexfork=128 -- start datavol02
VxVM is an awesome volume manager, and there are all kinds of cool things buried in the manual pages!