HP StoreEver MSL6480 Tape Library - Manual (Page 28)

Figure 7 Selecting the basic control path failover settings
Configuration requirements after enabling basic control path failure
When basic 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. You can find the new
world wide node name on the Status > Library Status screen.
Verifying control path failover
Basic control path failover
After enabling control path failover, modify switch zoning, if necessary, to enable host access to
the library.
To verify basic control path failover, you can force a failover from the Drives > Manual Control
Path Failover screen and verify that the control path has moved to the passive drive.
NOTE: There is always a library logical unit number hosted by a drive so the (LUN) indicator
does not change when basic control path failover is enabled. The library is presented as logical
unit number zero on its own world wide node name when basic control path failover is enabled
and is presented as logical unit number one on the drive world wide node name when basic control
path failover is not enabled.
Advanced control path failover
To verify advanced control path failover, you will need to power off the control path drive to create
a failover event. You can find the active control path drive for a partition from the Status > Partition
Map > Configuration Status screen, shown in
“Status of the Partitions Configuration to verify basic
control path failover” (page 29) .
To cause a failover event, power off the active control path drive from the Configuration > Drives
> Settings screen and then verify that the partition still has access to the host.
28 Configuring failover for HP StoreEver MSL6840 Tape Libraries