HP StorageWorks XP Remote Web Console Software - Manual (Page 13)

Snapshot XP user guide 13
Business Copy XP
Use Business Copy XP to maintain array-internal copies of all user data on the array for data on open
systems such as UNIX and PC servers. Business Copy XP creates a pair of P-VOL and S-VOL, both of
which are logical volumes in the same array. Pairs that Business Copy XP creates are called Business
Copy XP pairs.
RAID-protected S-VOLs are created within the same array as the P-VOL. Use Business Copy XP to create
up to three S-VOLs for a P-VOL. Using Business Copy XP with External Storage XP, you can use external
volumes to create Business Copy XP pairs.
Unlike the Snapshot XP pair’s S-VOL, all P-VOL data is copied to the Business Copy XP pair’s S-VOL.
Therefore, the capacity of the Business Copy XP pair’s P-VOL and S-VOL is the same. In addition, Business
Copy XP’s copy process takes longer because all P-VOL data is copied to the S-VOL.
As described previously, Business Copy XP requires larger array capacity and the copy process takes
longer compared to Snapshot XP. However, when a failure disables access to one of the pair’s volumes,
the array can continue to operate using data stored in the other volume because the same data is stored
in the P-VOL and S-VOL. HP recommends using Business Copy XP when data integrity is more important
than copy process speed or array capacity. For more information, see the HP StorageWorks Business
Copy XP user guide for the XP12000/XP10000/SVS200.