Extend VxFS filesystem

Solaris extend VxFS file system

I have a VxFS filesystem in "testdg" diskgroup

I have an extra drive c0t1t5

what are the steps I need to take to add this disk to the "testdg"
diskgroup and to extend the filesystem.

Please give me the exact commands so that I can add the whole disk(entire
capacity of c0t1d5) to the filesystem