Many design characteristics of the DS8000, its data copy and mirror capabilities, and features contribute to the full-time protection of your data. 

The information that is provided in this chapter is only an overview. Copy Services are covered in more detail in the following materials: 

## 5.1.2 Copy Services management interfaces 

GLYPH<SM590000> DS8000 Copy Services , SG24-8367 

GLYPH<SM590000> DS8000 Cascading FlashCopy Design and Scenarios , REDP-5463 

GLYPH<SM590000> IBM DS8870 Multiple Target Peer-to-Peer Remote Copy , REDP-5151 

GLYPH<SM590000> IBM DS8880 SafeGuarded Copy , REDP-5506 

You control and manage the DS8000 Copy Services functions by using the following interfaces: 

GLYPH<SM590000> Data Storage Command-Line Interface (DS CLI), which provides a set command that covers all Copy Services functions and options. 

GLYPH<SM590000> IBM Copy Services Manager (CSM), formerly known as Tivoli® Storage Productivity Center for Replication , to manage large Copy Services implementations easily and to provide data consistency across multiple systems. CSM is preinstalled on the Hardware Management Console (HMC) and can also be installed on a stand alone server or virtual machine. 

GLYPH<SM590000> IBM Storage Manager, the Graphical User Interface (GUI) of the DS8000 (DS GUI). 

GLYPH<SM590000> DS Open Application Programming Interface (DS Open API). 

IBM Z users can also use the following interfaces: 

GLYPH<SM590000> Time Sharing Option (TSO) commands 

GLYPH<SM590000> Device Support Facilities (ICKDSF) utility commands 

GLYPH<SM590000> ANTRQST Application Programming Interface (API) 

GLYPH<SM590000> Data Facility Storage Management Subsystem data set services (DFSMSdss) utility 

GLYPH<SM590000> DSCLI on z/OS (see 12.1.4, “Installing the DS CLI on z/OS System” on page 374) 

## 5.2 FlashCopy 

FlashCopy creates a point-in-time copy of the data. For open systems, FlashCopy creates a copy of the logical unit number (LUN). The target LUN must exist before you can use FlashCopy to copy the data from the source LUN to the target LUN. 

When a FlashCopy operation is started, it takes less than a second to establish the FlashCopy relationship, which consists of the source and target volume pairing and the necessary control bitmaps. Thereafter, a copy of the source volume is available as though all the data was copied. When the pair is established, you can read and write to the source and target volumes. 

