Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) - Manual (Page 86)

goes down. Supporting these two functions requires the ability to define overlapping zones that isolate
the tape traffic from the DASD traffic and allow local access to the DASD ports.
FIGURE 24 System Data Mover topology using Enhanced TI Zones
The figure above shows the following Enhanced TI Zone definitions for the System Data Mover
topology:
• Green Zone includes Host A, ISL 1, and CU B.
• Orange Zone includes CU A, ISL 2, and Host B.
• Red Zone includes Host A and CU A.
• Blue Zone includes Host B and CU B.
Using these definitions with failover disabled achieves the desired behavior. The production channels
can access the local DASD and use an exclusive path to write data to the remote tape. The remote
channels can access the remote tape and use an exclusive path to write data to the production DASD.
In both cases, the production tape traffic is excluded from intruding on the backup DASD traffic and
vice versa.
Maintaining and Troubleshooting FICON
84 FICON Administrator's Guide
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