FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010)

54 FICON Administrator’s Guide
53-1001771-01
Traffic Isolation Zoning
5
System Data Mover topology
Figure 17 shows a cascaded topology which can be used to support an operations recovery site. In
this environment, host and storage systems exist at both sites, which are connected by two
directors cascaded together using the System Data Mover (SDM) application. The storage differs
between the sites. In the production site, the storage is DASD to support fast access for production
applications. In the backup site, the storage is tape to support archival operations for system
restoration.
FIGURE 17 Typical System Data Mover topology
The host in the production site operates the SDM application that reads data from the DASD and
writes it to the remote tape. The path to the remote site is required to be isolated to support the
bandwidth requirements needed to write the data to the remote tape. The host in the backup site
needs access to the DASD in the production site to support a hot recovery scenario in the event the
production host 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.