HP XP Continuous Access Software - Manual (Page 283)

Configuration file examples 283
The instance 1 configuration file in the preceding figure specifies that:
• Three BC pairs are recognized.
• The BC pairs are intermediate S-VOL/P-VOLs, because the TID/LUN
combinations are all the same.
Connecting CA and BC
You can use three configuration files to describe a CA/BC cascaded
configuration, as shown in the following figure.
The configuration file in the center (HORCMINST for CA/BC) can be
interpreted as follows:
• The first line is ambiguous as to whether the pair is CA or BC because
the MU# is blank.
• The second line shows that the MU# is 0, meaning BC. The
Port/TID/LUN is the same as on the first line, so you know that the top
line refers to a CA pair.
• Since all three lines use the same Port/TID/LUN, you know that the
pair is the intermediate part of a CA, cascaded BC configuration.
Another hint that oradb is a CA pair is that its remote pair serving host is a
host other than HOST2, which serves this RM instance.