Business Copy Z Overview; Business Copy Z Software; How Business Copy Z Works; Hardware And Software Components - HP StorageWorks P9000 - Disk Arrays User Manual

1 Business Copy Z overview

Unless otherwise specified, the term P9000 in this guide refers to the following disk array:
P9500 Disk Array
The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer
browser. Actual windows may differ depending on the operating system and browser used. GUI
contents also vary with licensed program products, storage system models, and firmware versions.
Business Copy Z uses local mirroring technology to create and maintain a full copy of any volume
in the storage system.
This guide provides instructions for planning, pair operation, checking operational status, and
troubleshooting.

Business Copy Z software

With Business Copy Z software you create multiple copies of a data volume within the same storage
system. Business Copy Z backup data volumes can be used as backups or with target host
applications, data mining applications, and for testing — while the source business operations
continue to run at full capacity with the source data volume.

How Business Copy Z works

A pair is created when you:
Select a volume that you want to duplicate. This will become the source volume (S-VOL).
Identify another volume to contain the copy. This will become the target volume (T-VOL).
Associate the source and target volumes.
Perform the initial copy.
During the initial copy, the source volume remains available for read/write. After the copy is
completed, subsequent write operations to the source volume are regularly duplicated to the target
volume.
The S-VOL and T-VOL remain paired until they are split. When the pair is split, the source volume
continues to be updated, but data in the target volume remains as it was at the time of the split.
The T-VOL contains a mirror image of the original volume at that point in time.
T-VOL data is consistent and usable. It becomes available for read/write access by target host
applications.
Changes to the S-VOL and T-VOL are managed by differential bitmaps.
The volumes can be paired again by resynchronizing the update data from S-VOL-to-T-VOL,
or from T-VOL-to-S-VOL, as circumstance dictates.

Hardware and software components

A typical configuration consists of a P9500 storage system, a host connected to the storage system,
Business Copy Z software, a source volume, a target volume or volumes, and interface tools for
operating Business Copy Z.
Interface tools include the Remote Web Console graphical user interface (GUI) and VOS3 DMFVSS,
Business Continuity Manager, IBM PPRC host software functions, or IBM DFSMSdss host software
functions.
6 Business Copy Z overview