HP Store Once Backup System 2700, 4500 and 4700 Installation and Configuration Guide

from discovering unnecessary disk controllers. For optimal performance, where practical,
dedicate HBAs for disk and tape.
NOTE: Overlapping zones are supported.
Use the StoreOnce Management GUI to find out the WWPN for use in zoning. The WW port
names are on the VTL-Libraries-Interface Information tab.
Using WWN zoning for high availability
NOTE: For detailed examples of possible FC configurations with illustrations please refer to the
HP StoreOnce Concepts and Configuration Guidelines.
The StoreOnce appliance allows the robot and tape drives to be presented to the different FC ports
that are connected to the customer’s fabric. When the VTL is created there is the option to present
the device to Port1, Port2 or Port 1&2. If you choose to present the VTL to Port 1 &2, the following
happens. The robot is presented to both Port1 and Port2, 50% of the configured drives are presented
to Port1 and the other 50% to Port2 (this can be changed if required). With this configuration in
the event of a Fabric Failure – the robot and 50% of the drives are available for backup. The
downside to this feature is that only a single 8Gb FC link is available for backups.
NOTE: In the following illustration, which shows two FC ports connected, each line from a VTL
to a FC port represents 50% of the drives + robot.
Figure 22 VTL Fibre Channel resiliency using WWN zoning with StoreOnce Backup
Use the StoreOnce Management GUI to find out the WWPN for use in zoning. The WW port
names are on the VTL-Libraries-Interface Information tab.
NOTE: The StoreOnce 4700 Backup has four FC ports and, therefore, presents more options for
VTL library deployment.
76 Fibre Channel installation and configuration