
192 IBM eServer zSeries 900 Technical Guide
A compatible secondary volume must be available for each primary volume you want to
copy. The secondary volume must have the same geometry as the primary volume with an
equal or greater capacity.
GDPS/XRC software requirements
In addition to the GDPS/PPRC software prerequisites, XRC with ESS also requires the
following:
DFSMS/MVS 1.4.0 or above, with System Data Mover function
OS/390 V2 R6 or later
Figure 5-7 GDPS/XRC
5.4.3 GDPS and z900 features
GDPS consists of production images and controlling images. The production images execute
the mission critical workload. There must be sufficient processing ...