Figure 6: Status of the Partitions Configuration to verify basic control path failover
After verifying library connectivity using each of the library control paths, the library control path can be
moved back to the original drive if needed by power cycling the alternate control path drive.
Data path failover configuration
• The partition contains at least one LTO-6 dual-ported FC tape drive. SAS and other FC tape drives can
be in the same partition.
• The partition is not configured to use basic control path failover.
• Only hosts with advanced path failover drivers can access the drives in the partition. In a mixed
environment where some hosts have advanced path failover drivers installed and some hosts do not,
partition the library so that hosts that are using advanced path failover access one partition and hosts
not running the advanced path failover driver access the second partition.
• In some cases, a mix of host operating systems might be used with a single partition. For example, a
Windows host might be running the library control agent while a Linux host performs backups. In that
configuration, advanced control path failover could be enabled and the advanced path failover driver
installed on the library control host but the drives may be configured without path failover.
• The
HPE MSL6480 LTO-5&6 Control Path (CtrlP) Failover
license or the
HPE MSL3040 Ctrl
Failover
license has been added to the library.
• The partition contains at least one LTO-5 or LTO-6 dual-ported FC tape drive. SAS and other FC tape
drives can be in the same partition.
• The partition is not configured to use advanced control path failover.
Basic and advanced data path failover can be used with the drive ports configured in loop mode or fabric
mode. For best results and compatibility with basic control path failover, Hewlett Packard Enterprise
recommends that the drive ports be configured in fabric mode and connected to an FC switch.
Enabling data path failover
Data path failover is configured with the Expert Partition Wizard.
Data path failover configuration
35
