VERITAS Volume Manager 3.1 Storage Administrator Administrator's Guide

Volume Tasks
Resizing a File System
Chapter 4 201
When you have provided all necessary information in the dialog box,
click OK.
Notes:
This task requires a file system name and either the desired size or
the amount of space to add to or subtract from the file system size.
When the file system is resized, the underlying volume is also resized.
Only vxfs file systems can be shrunk.
The file system to be resized must be on a volume.