User's Manual

Diagnostic application
The Advanced Failover Diagnostic application communicates with the drivers to obtain the state
of failover sessions. The diagnostic application is installed with the driver and can be found in the
driver installation directory:
C:\Program Files\Hewlett-Packard\Advanced Failover Drivers\Utils or
C:\Program Files (x86)\Hewlett-Packard\Advanced Failover Drivers\
HPAdvFoDgn.
The application consists of two files, HPAdvFoDgn.exe and HPtapeFailover_mpio.dll.
Operation
The diagnostic application is started by double-clicking its icon. It displays a windows like the
window shown in Figure 19 (page 56). The window contains four panes:
Figure 19 Advanced failover diagnostic application
The Devices pane lists the tape drives and media changers that are associated with the path failover
drivers. This panel lists all devices that are capable of supporting advanced path failover regardless
of whether they are configured to use advanced path failover. In the example above Changer0
and Changer2 are paths to an ESL G3 library partition that is not using advanced path failover
so two entries are shown for the same changer. Changer1has advanced path failover enabled
and is only listed once. Since LTO-5 and older drives do not support advanced path failover, only
LTO-6 and newer drives will be listed.
The Paths pane shows information about the device which is selected in the Drives pane. In Figure 19
(page 56), the information is for the media changer named “Changer1.” The capital A in the Port
column of the Paths pane indicates the active control path to the SMC device server that is currently
being used, and the lower case a indicates alternate active control paths to the SMC device server.
56 Troubleshooting failover operation