HP StoreOnce Backup System Concepts and Configuration Guidelines (BB877-90913, November 2013)
Direct Attach (private loop)
A direct attach (private loop) topology is implemented by connecting the StoreOnce appliance
ports directly to a Host Bus Adapter (HBA). In this configuration the Fibre Channel private loop
protocol must be used.
NOTE: The HP StoreOnce B6200 Backup system is not supported in direct attach configurations.
Figure 22 Fibre Channel, direct attach (private loop) topology
Either of the FC ports on a StoreOnce Backup system may be connected to a FC private loop,
direct attach topology. The FC port configuration of the StoreOnce appliance should be changed
from the default N_Port topology setting to Loop. This topology only supports a single host connected
to each private loop configured FC port. In Private loop mode the medium changer cannot be
shared across FC Port 1 and FC port 2.
Zoning
Zoning is only required if a switched fabric topology is used and provides a way to ensure that
only the hosts and targets that they need are visible to servers, disk arrays, and tape libraries.
Some of the benefits of zoning include:
• Limiting unnecessary discoveries on the StoreOnce appliance
• Reducing stress on the StoreOnce appliance and its library devices by polling agents
• Reducing the time it takes to debug and resolve anomalies in the backup/restore environment
• Reducing the potential for conflict with untested third-party products
• Zoning implemention needs to ensure StoreOnce FC diagnostic device is not presented to
hosts
44 Fibre Channel considerations