HP StoreEver MSL6480 Tape Library - Manual (Page 18)

4 Preparing the switches and hosts for failover
Prerequisites for using basic data and control path failover:
•
The library drive FC ports must be attached to a Fibre Channel SAN that supports NPIV and
NPIV must be enabled. LTO-5 and LTO-6 drives need an 8G connection with the fill word set
to arb(ff). With 4G connections, set the fill word to idle.
•
The switch is running a supported version of software. For a list of supported software, see
the EBS matrix on the HP website:
http://www.hp.com/go/ebs
•
The drive port FC topology must be in Fabric mode and the switch side must be set to F-port
or Auto Sense.
•
The host Fibre Channel port must have a physical path to both the first port and secondary
(passive) port on the Fibre Channel drive.
•
For basic data path failover with port zoning, the host Fibre Channel port and both ports on
the drive need to be within the same zone for failover to work.
•
For basic data path failover with World Wide Port Name zoning, the host Fibre Channel
World Wide Port Name and a single first port on the drive need to be in the zone.
•
For basic control path failover with port zoning the host Fibre Channel ports and the ports on
both the active and secondary drive chosen for basic control path failover will need to be in
the same zone.
•
For basic control path failover with World Wide Port Name zoning the host Fibre Channel
World Wide Port Name and basic control path failover World Wide Port Name assigned to
the library must be in the same zone. The Library World Wide Port Name is not the same as
the World Wide Port Name of the drive that is hosting the library.
•
Hosts connecting to the library may need to be rebooted if the operating system does not
support dynamic device detection.
•
Applications on hosts may need to be reconfigured to recognize the new library world wide
name.
Prerequisites for using advanced data and control path failover:
•
With LTO-5 and LTO-6 drives with an 8G connection, set the fill word set to arb(ff). With 4G
connections, set the fill word to idle.
•
The switch is running a supported version of software. For a list of supported software, see
the EBS matrix on the HP website:
http://www.hp.com/go/ebs
•
For advanced data path failover, the host must have a physical path to both the first port and
secondary port on the Fibre Channel drive. For full failover capabilities, the two drive ports
should be connected to different switches and the host Fibre Channel ports should also be
connected to the same two switches.
•
All drive ports must be zoned in the respective switches.
Hardware-specific requirements for basic failover
Brocade switches
Most recent firmware versions have NPIV enabled by default but it is configured per port and could
have been disabled. Verify that NPIV is enabled.
For best reliability use firmware revisions v6.2.2f, v6.3.2d, v6.4.3e, v7.1.1c or newer, depending
on the switch family. See the EBS design guide for current supported revisions at
www.hp.com/
go/ebs ).
18 Preparing the switches and hosts for failover