Quantum Scalar i6000, User Manual

Page: 395 / 738

Chapter 10: Path Failover
Configuring Data Path Failover
Quantum Scalar i6000 User’s Guide 377
Note: The library issues a RAS ticket when automatic data path
failover occurs. In addition, the library monitors the standby
port and issues a RAS ticket if the standby port does not report
a good Fibre Channel link status.
The library uses Port 1 for data path transmission unless a failover
occurs. Once failover occurs, the library uses Port 2 until failover occurs
again or the library is rebooted. Similarly, if a tape drive configured for
data path failover is the control path for a partition, the host uses Port 1
for media changer commands unless a failover occurs. Once failover
occurs, the host uses Port 2 until failover occurs again or the library is
rebooted.
Note: Performing a drive reset operation is another way to make Port
1 the active port again.
A tape drive can be configured for both data path failover and control
path failover. If both are configured, the control path will not fail over to
another tape drive unless both ports on the control path tape drive fail.
Advanced Data Path Failover (ADPF): Advanced Data Path Failover is a
feature provided as part of the Storage Networking license and applies
only to HP LTO-6 and later Fibre Channel tape drives. It provides an
Port 2 – default failover port
Port 1 status LED
Port 2 status LED
Port 1 – default data path