HP StoreEver MSL2024, MSL4048, MSL8048, and MSL8096 Tape Libraries User and Service Guide (AK378-96059, December 2012)

Table Of Contents
Figure 15 Configure library, control path failover configuration disabled
In “Configure library, control path failover configuration available” (page 30) the configuration
requirements for enabling control path failover have been met and the library has made the option
for Enable Library Control Path Failover selectable as well as providing a selection for the Alternate
Drive for Library Control Path.
Figure 16 Configure library, control path failover configuration available
Configuration requirements after enabling control path failure
When control path failover is enabled, the library is no longer presented as a logical unit behind
the tape drive and is assigned a new Fibre Channel node name. After configuring the control path
failover parameters, you may need to make additional changes:
Switches using world wide name zoning will have to be configured to allow access to the
library controller. If the switch interface does not allow manually entering a world wide name,
the zone for the primary control path can be configured and then a failover may be forced
to cause the secondary path to be enabled and the second zone configured. (To force a
failover, see “Verifying control path failover” (page 31)). The library world wide name can
be found in the Identity: Library page, as shown in Figure 17 (page 31).
30 Features and overview