HP XP24000/XP20000 Business Copy Software User Guide (T5213-96034, November 2011)

or PSUS(SP) status. For details about pair status, see (page 21). You can reserve up to 16,384
volumes in one storage system.
Create Pair Operation
To create an XP Business Copy pair, the P-VOL must be in SMPL status. You may set a reserve
attribute on the S-VOL before creating a pair. You can also create a pair with an unreserved SMPL
volume. For details about how to create XP Business Copy pairs, see (page 66) and (page 77).
You can specify up to three S-VOLs for one XP Business Copy P-VOL and create three pairs. In
addition, the XP Business Copy cascade function allows you to create a second layer of up to two
S-VOLs for each S-VOL in the first layer. Pairs created between the first and second layer are called
cascaded pairs. Figure 2 (page 10) illustrates cascaded XP Business Copy pairs.
XP Business Copy Operations 9