270 Tivoli Storage Productivity Center for Replication for Open Systems
Restart the Global Mirror H2-H3
The go-back procedure is then completed and the normal operation configuration is restored.
This procedure does not require full copy of the data.
Figure 4-123 Site 3 planned outage state transition diagram
4.5 Troubleshooting
This section provides troubleshooting guidance for managing Tivoli Storage Productivity
Center for Replication with DS8000 storage systems.
4.5.1 Managing loss of connection to storage system
The loss of connection to DS8000 storage systems leads all the active Tivoli Storage
Productivity Center for Replication sessions that are using that DS8000 to an indeterminate
state. In Figure 4-124, the console log shows the connection loss events.
Figure 4-124 Console Log showing a connection loss event
In Figure 4-125 on page 271 and Figure 4-126 on page 271, the statuses of the storage
system and session after a connection loss are shown.
Chapter 4. Using Tivoli Storage Productivity Center for Replication with DS8000 271
Figure 4-125 Storage System Details panel that shows Disconnected status
Figure 4-126 Session Details panel that shows Severe status
Tivoli Storage Productivity Center for Replication continues polling the storage systems. After
the connection problem is fixed, the connectivity to the storage system and the actual session
status are immediately restored.
Other than the full box failure, there are two main causes that lead to a DS8000 connection
loss: network problems and HMC problems. In the following session, we describe this two
connection loss scenario.

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