HP XP P9500 Storage - Manual (Page 7)

1 About Compatible FlashCopy operations
This chapter provides an overview of Compatible FlashCopy operations on the P9500 storage
system.
About Compatible FlashCopy
The P9500 is functionally compatible with the IBM FlashCopy V2 (FCv2) and IBM FlashCopy SE
(FCSE) host control functions. Once the Compatible FlashCopy features are enabled, you can
perform FlashCopy operations on the P9500 by issuing PPRC TSO, DFSMSdss, ICKDSF, or
ANTRQST Macro commands from the host, and you can monitor FlashCopy operations from
Remote Web Console.
Hitachi Compatible Software for IBM FlashCopy V2 delivers FlashCopy V2 data mirroring
compatibility and interoperability for the P9500. Compatible FlashCopy V2 provides dataset-level
copy functionality and enables unattended point-in-time, full-volume, mirror-based data backup
under a FlashCopy operating environment.
Compatible FlashCopy SE provides an in-system solution for data protection that is IBM mainframe
compatible. It combines snapshots and virtual data management to create logical point-in-time (PiT)
copies. Once a source-target volume relationship is established, Compatible FlashCopy SE enables
thin-provisioned storage capacity that is allocated and used only when a change occurs in the
source volume. As backup copies are made to the target volume, storage resources are consumed
only on an as-needed basis, depending on the amount of changed data, resulting in lower overall
storage costs compared with full-volume physical mirroring.
The following Compatible FlashCopy operations are performed from Remote Web Console. All
other operations are performed from the mainframe host.
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Enabling the Compatible FlashCopy features:
Hitachi Compatible Software for IBM FlashCopy V2 ◦
◦ Compatible FlashCopy SE
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Viewing Compatible FlashCopy pair configuration and history.
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Setting the FC Slower Copy option.
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Changing the state change pending (SCP) time for control units (CUs).
Establishing a Compatible FlashCopy relationship
Compatible FlashCopy provides a fast data replication capability that enables you to copy the
source data to a targeted volume virtually or physically. A pair created by Compatible FlashCopy
is called a relationship. Once a relationship has been created, hosts can access the data that is
copied to the targeted volume.
You can also specify a range of data to be copied, which is called an extent, when you establish
a Compatible FlashCopy relationship. In addition, you can make multiple copies of data from one
copy source. When you specify only a part of a volume (that is, an extent) as the copy source, the
capacity of the source volume (S-VOL) and the target volume (T-VOL) can be different. However,
the specified target volume or extent must have a minimum size equal to that of the source volume
or extent. You can even specify both copy source and copy target within the same volume.
To establish a Compatible FlashCopy relationship, you need to specify a source volume (S-VOL)
and target volume (T-VOL). When you want to copy data according to dataset, you specify the
copy range as an extent in addition to the source and target. The smallest extent is a track.
Compatible FlashCopy enables you to establish up to 16 relationships from one extent, as shown
in the following figure.
About Compatible FlashCopy 7