Technical data

6.9.6 Reset the bootdef_dev Console Environment Variable
If you set the bootdef_dev console environment variable to multiple paths
in Section 6.9.1.5, the base operating system installation or clu_create
procedures modify the variable and you should reset it to provide multiple
boot paths.
To reset the bootdef_dev console environment variable, follow these steps:
1. Obtain the device name and worldwide name for the Fibre Channel unit
from where you will boot cluster member system 1 (Table 6–4).
2. Examine the reachability display (Example 6–5) provided by the
wwidmgr -quickset or the wwidmgr -reachability commands
for the device names that can access the storage unit from which you
are booting. Examine the show dev command output to ensure the
device name may be assigned to the bootdef_dev console environment
variable.
____________________ Notes ____________________
Choose device names that show up as both Yes and No in
the reachability display connected column. Keep in mind,
that for multiple-bus failover, only one controller is normally
active for a storage unit. You must ensure that the unit is
reachable if the controllers have failed over.
If you have multiple Fibre Channel host bus adapters, use
device names for at least two host bus adapters.
For example, to ensure that you have a connected boot path
in case of a failed host bus adapter or controller failover,
choose device names for multiple host bus adapters and each
controller port. For example, if you use the reachability
display shown in Example 6–5, you can choose the following
device names when setting the bootdef_dev console
environment variable for the first cluster member system:
dga131.1004.0.1.0 1
dgb131.1002.0.2.0 2
dgb131.1003.0.2.0 3
dga131.1001.0.1.0 4
1 Path from host bus adapter A to controller A port 1
2 Path from host bus adapter B to controller A port 2
3 Path from host bus adapter B to controller B port 1
4 Path from host bus adapter A to controller B port 2
6–72 Using Fibre Channel Storage