content_image/995985.jpg
## 6.11 Test scenarios for Example 2 (with On/Off CoD) 

Based on the configuration in 6.10, “Example 2: Setting up one ROHA cluster (with On/Off CoD)” on page 236, this section introduces two testing scenarios: 

## 6.11.1 Bringing two resource groups online 

GLYPH<SM590000> Bringing two resource groups online 

GLYPH<SM590000> Bringing one resource group offline 

When PowerHA SystemMirror starts cluster services on the primary node (ITSO_S1Node1), the two RGs go online. The procedure that is related to ROHA is shown in Figure 6-42. 

<img src='content_image/995985.jpg'>

Section 6.6, “Introduction to resource acquisition” on page 198 introduces four steps for PowerHA SystemMirror to acquire the resources. In this case, the following sections are the detailed descriptions of the four steps. 

## Query step 

PowerHA SystemMirror queries the server, EPCoD, the On/Off CoD, the LPARs, and the current RG information. The data is shown in the yellow tables in Figure 6-42. 

