Figure 9: Standby and active ports
After verifying that the configuration change was successful, verify that the hosts with access to the tape
drive are still able to communicate with the drive.
After verifying host access via the initial path, force a data path port failover by disconnecting the cable
from the active port on the drive or using an FC switch management interface to down the port connected
to the tape drive.
The drive status display shows which drive port is active and which port is in standby. After disconnecting
the cable from the active port verify that the library network management page port status shows that the
active port has changed. Reconnect the disconnected port and verify that it shows as
Standby
. Verify
that each host still has access to the tape drive.
If a particular port is the preferred active port and it is configured as
Standby
you can force selection of a
particular port as the active port by disconnecting the cable from the other port.
Making the standby port be the active port
To make the standby port active, disconnect the FC cable from the active port. After the library control
path has failed over to the standby port, reconnect the FC cable.
Configuring basic control path failover
Enabling control path port failover on the library
Enabling control path failover
Prerequisites
• The library is used in a Fibre Channel SAN and connected as fabric devices.
• The library or logical library has two LTO-5 or two LTO-6 Fibre Channel drives of the same type
(Ultrium 6250 half height; 3000 half height, or Ultrium 3280 full height)
• All drive ports are configured to use a “Fabric N/F” connection
Making the standby port be the active port
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