HP StorageWorks Clustered File System 3.2.1 Windows Storage Server Edition Administration Guide (February 2006)

Chapter 7: Configure Dynamic Volumes 54
Filesystem: If you want HP Clustered File System to create a filesystem
that will be placed on the dynamic volume, enter a label to identify the
filesystem. If you do not want a filesystem to be created, remove the
checkmark from “Create filesystem after volume creation.”
If you are creating a filesystem, you can also select the options to apply to
the filesystem. Click the Options button to see the Filesystem Options
dialog, which allows you to set the block size (either 4 KB or 8 KB).