There is one VG (sharevg) in this RG, and there is one hdisk in this VG. You must set the parameter reserve_policy  to no_reserve  for all the disks if you want to enable the disk fencing policy. In our case, hdisk2 is used, so you must run the following command on each PowerHA node: 

## 9.12.2 Quarantine policy configuration in PowerHA 

chdev -l hdisk2 -a reserve_policy=no_reserve 

This section describes the quarantine policy configuration in a PowerHA cluster. 

## Ensuring that the active node halt policy is disabled 

Note:  If the ANHP policy is also enabled, in case of a cluster split, ANHP takes effect first. 

Complete the following steps: 

1. Use the SMIT fast path smitty cm_cluster_quarintine_halt , or run smitty sysmirror and then select Custom Cluster Configuration →  Cluster Nodes and Networks → Initial Cluster Setup (Custom) →  Configure Cluster Split and Merge Policy →  Split and Merge Management Policy →  Quarantine Policy →  Active Node Halt Policy . 

2. Example 9-83 shows the window. Select Configure Active Node Halt Policy . 

Active Node Halt Policy Move cursor to desired item and press Enter. HMC Configuration Configure Active Node Halt Policy 

3. Example 9-84 shows where you can disable the ANHP. 

Active Node Halt Policy Type or select values in entry fields. Press Enter AFTER making all desired changes. [Entry Fields] * Active Node Halt Policy No + * Critical Resource Group [testRG] 

## Enabling the disk fencing quarantine policy 

Use the SMIT fast path smitty cm_cluster_quarantine_disk_dialog , or you can run smitty sysmirror  and select Custom Cluster Configuration →  Cluster Nodes and Networks → Initial Cluster Setup (Custom) →  Configure Cluster Split and Merge Policy →  Split and Merge Management Policy →  Quarantine Policy →  Disk Fencing . 

