HP XP Racks - Manual (Page 240)

Figure 94 Example of a 4x4x4 Cascade configuration (2x2x2)
Preparing Hardware (4x4x4 Cascade)
The following tables describe the prerequisite hardware and the storage system settings required
to use Business Continuity Manager in a 4x4x4 Cascade configuration.
Table 78 Prerequisite Hardware (4x4x4 Cascade Configuration)
Remarks Description Item
You need a host for a remote site when using
Business Continuity Manager at a remote
site. One host computer is required for each of the primary,
intermediate, and remote sites. Host
Configuration limitations may exist. Consult
your HP Representative for detailed One or more XP12000, XP24000, XP P9500 disk
arrays, or XP7 storage are required for each site. Storage system
240 Configuration definitions