If you need to extend or shrink a VxFS file system, you can use the fsadm command.
If a VxFS file system requires more space, you can use this procedure to extend the size of the file system. If a VxFS File System is too large and you need the space elsewhere, you can use this procedure to shrink the file system.
Remember to increase the size of the underlying device or volume before increasing the size of the file system.
See the Veritas Volume Manager Administrator's Guide.Veritas Volume Manager Administrator's Guide.
Before resizing a file system, revew the following: