Application program interfaces

Using EMC DASD may require the installation of EMC Application Interfaces, obtained from EMC, if the source or target volumes use the Symmetrix Remote Data Facility (SRDF), with or without the EMC Consistency Group software installed or if any EMC SAR function is used.

If the EMC DASD uses standard Peer-to-Peer Remote Copy (PPRC) functions in lieu of SRDF, then the EMC application program interface code is not required.

EMC API code can provide three different functions:

EMCSAI

The low-level Application Program Interface (API) that provides the Symmetrix Control Facility (SCF) interface

CGRPQDEV

A low-level Application Program Interface (API) for EMC Consistency Group support in CGRPQDEV

EMCSARQ

A low-level Application Program Interface (API) for EMC SAR support in SARQDEV

Important: TDMF detects if the EMC Symmetrix Control Facility (SCF) Application Program Interface (API) is installed in the operating system on all master and agent systems. If it is installed, the EMC Symmetrix Control Facility (SCF) Application Program Interface (API) must be either active, or it must have at least been started since the last IPL, although it may not be currently active. If it is not active, and has not been started since the last IPL, TDMF will terminate with a severe error. Without access to the interface, TDMF cannot detect the existence of the Symmetrix Remote Data Facility (SRDF) devices or the use of an EMC Consistency Group.