Verifying The Physical Data Paths - Hitachi G1000 User Manual

Related topics
• Requirements and restrictions on page 2-2
• Planning the quorum disk on page 3-10

Verifying the physical data paths

Make sure that the following physical data paths are connected and
configured:
• From the primary system to the secondary system: two or more paths
• From the secondary system to the primary system: two or more paths
• From the primary system to the external system: two or more paths
• From the secondary system to the external system: two or more paths
• From the host to the primary system: two or more paths
• From the host to the secondary system: two or more paths
The following figure shows the physical data paths (redundant paths not
shown). Although only one path is required for each location, it is strongly
recommended that you connect the storage systems using at least two
physical paths. If you connect nodes using only one physical path, an
unexpected failover might occur in the server, or the GAD pairs might be
suspended, even though only one path or hardware failure has occurred.
When maintenance is performed on the physical paths between storage
systems, the GAD pairs must be suspended.
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Configuration and pair management using CCI
4-9