Vls12000 Eva Gateway Connected To An Eva - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Figure 46 VLS12000 EVA Gateway Connected to an EVA
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• Ensure that the zoning configuration is complete and that storage ports 2 and 3 on each VLS node
connect to different switches/fabrics or zones. The EVA controllers must also be connected to both
switches/fabrics or zones.
• VLS nodes can be configured through the EVA to have dual Fibre Channel paths to the back-end
disk arrays. With dual paths, if one path fails the node can still access each LUN through the re-
maining path(s). To get the best performance from the EVA, you must have balanced performance
across the array controllers. To address these requirements:
• VLS software will automatically recognize the multiple paths to the disk array LUNs. If it does
not, revisit your configuration and make changes as necessary so that the software does recog-
nize all paths upon rebooting the system.
• Path failure is reported through the array information presented in the graphical user interface.
NOTE:
Path failure can reduce throughput for backup and restore operations.
• Balance data traffic across both controllers of the array (called A and B in Command View
VLS). To do this, ensure that the preferred path for half of the VRaids in the array is set to Path
A-Failover only, and the preferred path for the other half of the VRaids in the array is set to
Path B-Failover only.
120 Virtual Library Systems