HP XP P9500 Storage - Manual (Page 20)

LUN Expansion
LUSE volumes can be assigned to ESAM pairs, provided that both P-VOL and S-VOL are LUSE
volumes consisting of the same number of LDEVs, the same size, and the same structure.
Configurations with Business Copy volumes
You can use the ESAM S-VOL as a Business Copy P-VOL. This configuration benefits the ESAM
pair if the P-VOL is logically destroyed. In this case, you can recover the data from the split Business
Copy S-VOL.
Figure 5 Sharing ESAM S-VOL with Business Copy P-VOL
Configuring ESAM with Business Copy
Procedure 1 To configure ESAM with Business Copy:
1. Create the ESAM pair. Make sure that pair status becomes PAIR.
2. Create the Business Copy pair, using the ESAM S-VOL as a Business Copy P-VOL.
3. Split the Business Copy pair and resume host operations on the ESAM P-VOL.
For the data recovery procedure, see “Recovery using Business Copy S-VOL ” (page 51) .
Configurations with Continuous Access Journal volumes
You can use the ESAM S-VOL as a Continuous Access Journal (Cnt Ac-J) P-VOL. This configuration
benefits the ESAM pair if data in the P-VOL and S-VOL become inconsistent due to a disaster. In
this case, you can recover the data from the split Continuous Access Journal S-VOL.
Figure 6 Sharing ESAM S-VOL with Continuous Access Journal P-VOL
20 Planning, system requirements, and recommendations