Technical data
4 Path from host bus adapter A to controller B port 2
c. Set the bootdef_dev console environment variable for member
system 2 boot disk to a comma-separated list of several of the
boot paths that show up as connected in the reachability display
(wwidmgr -quickset or wwidmgr -show reachability). You
must initialize the system to use any of the device names in the
bootdef_dev variable as follows:
P00>>> set bootdef_dev \
dga132.1001.0.1.0,dga132.1004.0.1.0,\
dgb132.1002.0.2.0,dgb132.1003.0.2.0
POO>>> init
3. Boot the new cluster member system into the cluster and complete the
cluster installation.
4. Repeat steps 1 through 3 for other cluster member systems.
6.10 Converting the HSG80 from Transparent to
Multiple-Bus Failover Mode
If you are migrating from Tru64 UNIX Version 4.0F or Version 4.0G and
TruCluster Software Products Version 1.6 to Tru64 UNIX Version 5.1A and
TruCluster Server Version 5.1A, you may want to change from transparent
failover to multiple-bus failover to take advantage of multibus support in
Tru64 UNIX Version 5.1A and multiple-bus failover mode and the ability to
create a no-single-point-of-failure (NSPOF) cluster.
Or, you may be using transparent failover mode with Tru64 UNIX Version
5.1A and TruCluster Server Version 5.1A and want to take advantage of
the ability to create an NSPOF configuration, and the availability that
multiple-bus failover provides over transparent failover mode.
6.10.1 Overview
The change in failover modes cannot be accomplished with a simple SET
MULTIBUS COPY=THIS HSG80 CLI command because:
• Unit offsets are not changed by the HSG80 SET MULTIBUS_FAILOVER
COPY=THIS command.
Each path between a Fibre Channel host bus adapter in a host computer
and an active host port on an HSG80 controller is a connection. During
Fibre Channel initialization, when a controller becomes aware of a
connection to a host bus adapter through a switch or hub, it adds the
connection to its table of known connections. The unit offset for the
connection depends on the failover mode in effect at the time that the
6–76 Using Fibre Channel Storage