The host will have two different worldwide names for the two different HBAs and each worldwide name
may be granted access to all ports or one name may be granted access to the first Fibre Channel port
and the second name may be granted access to the second Fibre Channel port.
Library configurations for mixed failover environments
In a mixed failover environment, hosts with advanced path failover drivers and hosts without advanced
path failover drivers all access the same tape library. Only a host using advanced path failover drivers can
access a tape drive configured for advanced path failover. The library reports an error if a host without the
advanced path failover drivers attempts to access a tape drive configured for advanced path failover.
The ESL G3 supports two methods of configuring the library to operate in mixed failover environments:
• Library partitions—The library is configured in multiple partitions such that all of the hosts accessing all
of the tape drives in the partition are either using advanced failover drivers or are not using advanced
failover drivers.
• Drive pools—The tape drives in a partition are configured into multiple pools where all of the hosts with
advanced path failover drivers use one pool of drives and advanced data path failover is enabled on
those drives. At the same time, a second pool of drives in the same partition either has basic data path
failover enabled or no data path failover enabled. The second pool of drives is accessed by the hosts
that do not have advanced path failover drivers.
Enabling data path failover
Procedure
1.
Log in to the Management Console as a user with Administrator privileges.
2.
Select the
Physical
managed view.
3.
Select
Setup
>
Partitions
>
Data Path Failover
.
4.
The
Data Path Failover (DPF)
dialog appears and displays all LTO-5 and LTO-6 drives. You can filter
the list by partition. Select the drives for which you want to enable failover and the type of failover, and
then click
OK
.
a.
To enable advanced path failover (ADPF), select the
ADPF
or
Driver
box for the drive.
b.
To enable basic path failover (BDPF), select the
BDPF
box for the drive.
NOTE:
Any drives that belong to an access group and have hosts mapped to the second port are
considered to be custom mapped. BDPF cannot be enabled on these drives until the custom
mapping is removed.
Advanced Data Path Failover can only be enabled on LTO-6 drives. Basic Data Path Failover
can be enabled on both LTO-5 and LTO-6 drives.
See the
StoreEver Enterprise Systems Library (ESL) G3 Tape Library User Guide
for more
information on modifying partitions.
22
Library configurations for mixed failover environments
