Model Switching

By default, the DR 2.0 is enabled when you install the Solaris 8 operating environment Update 6. However, you can switch the model by using the first of the two procedures in "Switching DR Models". If you have DR 3.0 enabled, you can use the second procedure to switch back to DR 2.0.

Switching DR Models

The steps in both of the following procedures are executed on the domain.

If you switch to DR 3.0 in a domain that is running the Solaris 8 operating environment Update 6, you must upgrade the SSP software to version 3.5. SSP versions 3.3 and 3.4 do not support DR 3.0 operations.

To Switch to DR 3.0

1. Change directories to the following directory:

   /platform/SUNW,Ultra-Enterprise-10000/kernel/drv

2. Modify the ngdr.conf file to set the legacy-dr-model variable to 0 (zero).

   The default value for legacy-dr-model is 1.

   legacy-dr-model=0;

3. Reboot the domain.

   After the reboot, you can verify that DR 3.0 is enabled by viewing the /var/adm/messages file for the following message.

   NOTICE: Next Generation DR Model (DR 3.0) is enabled

   To ensure that the SSP recognized the model switch, execute the following command on the SSP: domain_status -m.

To Switch to the DR 2.0

1. Change directories to the following directory:

   /platform/SUNW,Ultra-Enterprise-10000/kernel/drv

2. Modify the ngdr.conf file to set the legacy-dr-model variable to 1.

   legacy-dr-model=1;

3. Reboot the domain.

   After the reboot, you can verify that the legacy model is enabled by viewing the /var/adm/messages file for the following message.

   NOTICE: Legacy DR Model (DR 2.0) is enabled

   To ensure that the SSP recognized the model switch, execute the following command on the SSP: domain_status -m