Having used two different packages to provide this kind of functionality my opinion is this;
Disksuite is free with Sol7
Veritas Logical Volume Manager is not free
You get what you pay for.
If all you want is straight RAID 0+1, or in your case RAID 1, for a relatively small set-up that is a relatively static size. It has more than enough guts for the job. Go for it !
If you have a dynamic system with high potential growth or a large number of disks, Veritas LVM is your friend. Ian
"IF" is not a word it's a way of life