HP XP External Storage Software - Manual (Page 141)

When resource group 2's status is Online, change resource group 2's execution node to
node 2 (failback). •
• When resource group 2's status is Offline, start resource group 2.
Errors in all paths to the external array
The following sections describe the recovery procedures for two examples when the error occurs in
all paths connected to the external array.
If each node uses a different external array
In the configuration in Figure 64 , all of the NAS Blade system's user LUs are volumes in the external
array. Each node uses the volume of a different array. All of node 1's user LUs are volumes in external
array 1. Therefore, if an error occurs in the path between the local array and external array 1, the
error occurs in all paths connected from node 1 to external array 1. In this situation, no user LU is
available for node 1.
The situation in Figure 64 is as follows:
• The NAS Blade system attempts to change resource group 1's execution node to node 2 because
no user LU can be used from node 1 (failover). However, node 2 cannot access volumes in external
array 1, the failover function failed, and an srmd executable error appears as error information
for resource group 1.
• The file system's status is blocked on node 2 because of the failure of the failover of resource
group 1.
• Clients cannot access volumes in external array 1, but can access volumes in external array 2.
• The local array recognizes that the status of all file systems and volumes in external array 1 are
blocked.
External Storage XP user guide for the XP12000, XP10000, SVS200 141