Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) - Manual (Page 85)

System Data Mover topology
The figure below 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 switches
cascaded together using the System Data Mover (SDM) application. The storage differs between the
sites. In the production site, DASD storage is used to support fast access for production applications. In
the backup site, tape storage is used to support archival operations for system restoration.
FIGURE 23 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
System Data Mover topology
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