HP StoreOnce 4430 HP StoreOnce Backup System Concepts and Configuration Guidel - Page 44

Direct Attach (private loop), Zoning, Some of the benefits of zoning include

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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

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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