HP StorageWorks Clustered File System 3.6.1 File Serving Option for Windows administration guide (AG515 - 96008, August 2008)

Chapter 4: Configure Virtual CIFS Servers 18
If FS Option for Windows detects that a Virtual File Share can no longer
be accessed on the primary node, by default HP Clustered File System
will fail over the associated Virtual CIFS Server to one of the designated
backup nodes. Clients then access the Virtual CIFS Server’s Virtual File
Shares from that node. Because the files associated with the Virtual File
Shares are located on a PSFS cluster filesystem, the backup node can
immediately access the data.
By default, the Virtual CIFS Server will remain active on the backup node.
However, you can customize the failover and failback behavior. For
example, after access to the Virtual File Share is restored on the original
node, you may want the Virtual CIFS Server to fail back to that node.