How to check free diskspace using veritas volume manager

How to check free diskspace using veritas volume manager
#vxdg free (list free diskspace for all diskgroup)
#vxdg -g free (list free diskspace for certain diskgroup)

* column #6 (length), this is the free diskspace information (sectors)
size(GB)=sector/2/1024/1024
* column #1, diskgroup name
* column #2, diskname

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