Establish Flashcopy Relationships - IBM System storage DS6000 Series Redbook

hex notation. In hex notation the third parameter refers to the channel connection address
(CCA) of the corresponding device.

24.5.4 Establish FlashCopy relationships

The next step is to create the FlashCopy relationship between the B volume and the C
volumes at the remote site; note in Figure 24-10 the particular attributes for FlashCopy
because it is being used in a Global Mirror environment.
Host
Global Mirror
session paths
Figure 24-10 ICKDSF - create FlashCopy relationship for Global Mirror
Depending on whether you connect to the remote site or to the local site, the FlashCopy
command is either directly issued to the remote storage disk subsystem or via an inband
command. The inband command is targeted to the local primary volume, and provides
addressing information for the FlashCopy source and target volumes at the remote site.
Example 24-25 shows an inband ICKDSF job example under the assumption that usually
there is no host connection from the local site to the remote storage disk subsystem, which
may reside on another continent.
Example 24-25 ICKDSF FlashCopy establish via an inband command
//* -------------------------------------------------------------- ***
//STEP01 EXEC PGM=ICKDSF
//SYSPRINT DD SYSOUT=*
//SYSIN
FLASHCPY
FC
/*
Primary volumes
LSS
Subordinate
Long distance
LSS
Global Copy
volume pairs
LSS
LSS
Local site
Master
(primary)
DD *
UNIT(7000) ESTABLISH
SOURCEVOL(X'00' X'00' X'7800' 25941)
TARGETVOL(X'01' X'00' 7900)
CHANGERCD(YES)
INHIBWRTS(YES)
MODE(NOCOPY)
TARGETCANCOMEONLINE(NO)
UNIT(7000) QUERY
SRCVOL(X'00' X'00' X'7800' 25941
Secondary volumes
Global Copy
paths
Global Copy
paths
-
-
-
-
-
-
-
Chapter 24. Global Mirror interfaces
= Flashcopy source
Flashcopy target
Change recording
LSS
Target write inhibited
Persistent
No background copy
LSS
Remote site
(secondary)
317