HP XP Business Copy Software - Manual (Page 9)

You operate XP Business Copy from the Remote Web Console computer, and copy volumes in the
storage system. A volume that has original data is called a P-VOL, and a volume to which the data
is copied is called an S-VOL. A pair of the P-VOL and the S-VOL made by XP Business Copy is
called an XP Business Copy pair.
You may operate XP Business Copy directly from the host if you use RAID Manager. For details,
see
“RAID Manager” (page 9) .
Volume Pairs and Consistency Groups
XP Business Copy performs internal copy operations for logical volume pairs established by the
user. Therefore, XP Business Copy needs at least two volumes, one for the copy source (P-VOL)
and the other for the copy target (S-VOL). Each P-VOL can have up to three S-VOLs that are located
on the same storage system.
The XP Business Copy P-VOLs are the primary volumes that contain the original data. The XP
Business Copy S-VOLs are the secondary volumes that contain the backup data. Each S-VOL must
be paired with only one P-VOL. During XP Business Copy operations, the P-VOLs remain available
to all hosts for read and write I/O online operations (except during reverse copy and quick restore
operations). When the pair status is PAIR and if the P-VOL is updated, the differential data between
P-VOL and S-VOL will be copied to the S-VOL regularly. However, since XP Business Copy S-VOLs
are updated asynchronously, the P-VOL and S-VOL of the pair in PAIR status may not be identical.
Remember that the S-VOLs become available for host access only after the pair has been split.
Using RAID Manager, you can define multiple XP Business Copy pairs as one consistency group.
If you have defined a consistency group, you can split all XP Business Copy pairs in the group by
using the At-Time Split function. For details about the At-Time Split function, see
“Split Pair Operation”
(page 13) .
XP Business Copy Software
You can operate XP Business Copy by using the Remote Web Console computer. Remote Web
Console is attached to the storage systems through the TCP/IP local-area network (LAN). Remote
Web Console communicates and exchanges data directly with the service processor (SVP) of the
attached storage systems. You can view the structure or status of the storage system, or issue
commands to the storage system.
License
You need to purchase the XP Business Copy license and make sure that there is enough licensed
capacity for the capacity of the pairs you are going to create.
P-VOLs, S-VOLs, and reserved volumes require XP Business Copy licenses for volume capacity and
management. Before purchasing a volume capacity license, determine how much volume capacity
you will need. The total volume capacity you need to use cannot exceed the maximum licensed
volume capacity you have purchased.
RAID Manager
To operate XP Business Copy without using Remote Web Console, you can use RAID Manager.
By using RAID Manager, you can issue the commands directly from the host and operate XP Business
Copy.
XP Business Copy Operations
This section describes the main operations of XP Business Copy.
Set Reserve Attribute Operation
The XP Business Copy set reserve attribute operation reserves a volume so that it can be used as
an XP Business Copy S-VOL. Reserved volumes can only be used as XP Business Copy S-VOLs. The
XP Business Copy Operations 9