Quantum Scalar i6000 User Manual page 396

Chapter 10: Path Failover
Configuring Data Path Failover
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alternate data path when a preferred data path fails. If you previously
installed a Storage Networking license, you can use this feature once
you upgrade library firmware to the appropriate version. Verify
firmware version requirements in the
The HP LTO-6 and later Fibre Channel tape drives have two Fibre Channel
ports. If you enable Advanced Data Path Failover on the tape drive, both
ports are available but the driver chooses one port to be "active" and
used for data transmission, while the other port stands by for use if the
"active" port fails. If the tape drive loses its Fibre Channel link with the
"active" port, it will fail over and use the standby port to continue drive
operations.
Port 1 – default data path
Note: The library issues a RAS ticket when a 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 utilizes a driver installed on the host to manage path failover.
It uses Port 1 for data path transmission unless a failover occurs. Once
failover occurs, the driver uses Port 2 until failover occurs again or the
library is rebooted. Similarly, if a tape drive configured for advanced
data path failover is the control path for a partition, the host uses Port 1
Scalar i6000 Release Notes
Port 1 status LED
Port 2 status LED
Port 2 – default failover port
Quantum Scalar i6000 User's Guide
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