HP Mainframe Connectivity Design Guide

Figure 17 (page 126) shows an XRC pull configuration over a long-distance link.
Figure 17 XRC pull configuration
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Production
LPARs
Production
volumes
(Source)
Replicated
volumes
(Target)
FICON directors
(optional)
Local Remote
SDM
LPAR(s)
XRC push configuration
HP recommends that you not use a push configuration for XRC. In a push configuration, the SDM
mainframe can lose contact with target volumes if a link fails. All in-progress updates may be lost.
When the link is reestablished, the XRC configuration requires that volumes be resynchronized.
Figure 18 (page 126) shows an XRC push configuration over a long-distance link.
Figure 18 XRC push configuration
25293a
Production
LPARs
Production
volumes
(Source)
SDM
LPAR(s)
Replicated
volumes
(Target)
FICON directors
(optional)
Local Remote
Tape vaulting
HP does not offer FICON tape or FICON tape vaulting products. However, you can use mainframe
tape products across an HP FICON SAN. This section describes two types of FICON tape vaulting
over a long-distance link: native and virtual.
Native tape vaulting
Native tape vaulting uses tape drives connected directly to a CHPID, either through a SAN or over
a long-distance link (with or without a SAN). The mainframe communicates directly with the tape
drive, not with a virtual tape system.
126 FICON and FICON SAN extension