Many design characteristics of the DS8000 and the data copying and mirroring
capabilities of the Copy Services features contribute to the protection of your data,
24 hours a day and seven days a week. The following information provides a brief
description of each of these licensed features.
You can manage Copy Services functions through the command-line interface
called the IBM TotalStorage DS CLI and the Web-based interface called the IBM
TotalStorage DS Storage Manager. The DS Storage Manager allows you to set up
and manage the following data-copy features from anywhere that network access is
available.
Point-in-time copy
The point-in-time copy feature, which includes FlashCopy, enables you to
create full volume copies of data using source and target volumes that span
logical subsystems within a single storage unit. After the FlashCopy function
completes, you can immediately access both the source and target copies.
Remote Mirror and Copy
The remote mirror and copy (previously known as Peer-to-Peer Remote
Copy or PPRC) feature copies data between volumes on two or more
storage units. When your host system performs I/O operations, the source
volume is copied (mirrored) to the target volume automatically. After you
create a remote mirror and copy relationship between a source volume and
a target volume, the target volume continues to be updated with changes
from the source volume until you remove the relationship between the
volumes.
The following functions of remote mirror and copy are available:
v IBM TotalStorage Metro Mirror (previously known as Synchronous PPRC)
v IBM TotalStorage Global Copy (previously known as PPRC Extended
Distance)
v IBM TotalStorage Global Mirror (previously known as Asynchronous
PPRC)
Remote
mirror for z/OS
z/OS Global Mirror (previously known as Extended Remote Copy or XRC)
provides a long-distance remote copy solution across two sites for open
systems and z/OS data using asynchronous technology. It is based on the
existing Copy Services functions called Global Copy and FlashCopy and
additional new functions that form consistency groups across one or more
storage units to manage and control Global Mirror sessions.
Consider
the following Copy Services information:
v The licenses for Copy Services features (remote mirror and copy and
point-in-time copy) must be activated in the DS Storage Manager before you can
begin using the features.
v A Copy Services domain, configured as part of the IBM TotalStorage Enterprise
Storage Server
®
(ESS) Models 750 and 800, is supported on the DS8000
storage unit.
IBM TotalStorage Resiliency Family
IBM TotalStorage Resiliency Family is a set of products and features that are
designed to help you implement storage solutions that keep your business running
24 hours a day, 7 days a week.
Chapter 8. Optional feature codes for the DS8000 105
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