Adding shared disk to Cluster Volume Manager 2.2

Hello Managers I have a doubt regarding adding one disk to existing
shared disk storage in control of CVxVM 2.2

in

http://docs.sun.com/db/doc/806-2329/6jbi8kk32?q=cluster+volume+manager&a=view

I must add a new disk to a existing A5200 in two E4500 cluster running
Solaris 8 and Cluster Veritas Volume Manager.

It says that to ADD a new shared disk to CVM the all cluster nodes must
be down, then add them to CVxVM control with vxdisksetup -i devicename
the new shared disk then up one node only, then create the volumes on
that new disks , and then bring up the second node.

Thats a lot of time for both nodes down, and I really can't afford both
nodes down, Only one.

Can I add to CVxVM control, the disk(s) being this node up ? and then
making the following steps described in the documents.

The document also says that there are shared disk groups and private
disk groups, however I cant find any diferences beetwen the traditional
vxvm commands and the cvxvm commands, Perhaps all shared storage beetwen
nodes is enough to make them shared disk groups ?

any feedback is welcome, I know is kind of late bue is an emergency
service for sunday.

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[1766 byte] By [CodeProf.com] at [2007-12-25 1:41:00]