HP XP Racks - Manual (Page 24)

Continuous Access Journal Z (Cnt Ac-J Z)
Writes updated data and control information to the master journal on the primary site. When the
secondary site makes a read journal request, the updated data and control information are written
from the master journal to the restore journal (on the secondary site). This activity is performed
asynchronously to host I/O processing.
Remote volume operations
A command device defined in Business Continuity Manager allows you to remotely create copy
pairs, remotely operate volumes, and remotely monitor the status of volumes. This allows you to
reduce the operational costs of remote locations.
Figure 2 (page 24) explains remote volume operation.
Figure 2 Remote volume operation
24 Overview of HP XP7 for Business Continuity Manager