Compaq AA-RHGWC-TE manual 54Using Fibre Channel Storage

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 (see Table 6–2).

2.Check the reachability display (Example 6–5) provided by the wwidmgr -quicksetor the wwidmgr -reachabilitycommands for the device names that can access the storage unit from which you are booting.

Check the show dev command output to ensure the device name may be assigned to the bootdef_dev console environment variable.

____________________ Notes ____________________

1

2

3

4

You should 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, you should 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 could 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

Path from host bus adapter A to controller A port 1

Path from host bus adapter B to controller A port 2

Path from host bus adapter B to controller B port 1

Path from host bus adapter A to controller B port 2

You can set units preferred to a specific controller, in which case both controllers will be active.

3.Set the bootdef_dev console environment variable for member system 1 boot disk to a comma-separated list of several of the boot path(s) that show up as connected in the reachability display (wwidmgr -quickset

6–54Using Fibre Channel Storage