IBM DS6000 User Manual
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IBM System Storage DS6000 Series: Copy Services with IBM System z
Table 9-9 Options and parameters used for FlashCopy with DFSMSdss COPY FULL
The following considerations apply to the supported options:
Multiple relationship FlashCopy
It is possible to establish up to 12 FlashCopy relationships using the same source. When
setting up a FlashCopy, it is necessary to determine whether the source volume might be
used in other FlashCopy relationships as well. Once a source volume is used in a
FlashCopy without identifying it as a multiple relationship source volume, it is not possible
to define other FlashCopies using this volume as source volume. Once established using
the DS SM, this attribute cannot be changed for an existing FlashCopy relationship.
Consistency Groups for FlashCopy
You can use the FlashCopy Consistency Group function to minimize application impact
when making consistent copies of data spanning multiple volumes. The procedure
consists of freezing the source volume during each volume copy operation, and thawing
all the frozen volumes using the CGCREATE command after a FlashCopy Consistency
Options
Parameter with
DFSMSdss
COPY FULL
Remark
Options for the source volume
Multiple relationship FlashCopy
selected pairs
Consistency Groups for
FlashCopy
FCCGFREEZE
CGCREATE
FCCGVERIFY
see note (1)
Options for the target volume
FlashCopy target can be Metro
Mirror or Global Copy primary
FCTOPPRCPrimary
Permit target volume to be online
—z/OS environment
no specific parameter
required
volume online / offline will be
handled by DFSMSdss as
required
Inhibit writes to target volume
not supported
Options for FlashCopy pair
Identification of FlashCopy pair
in the commands
Incremental FlashCopy
Persistent FlashCopy
Change Recording
FCINCREMENTAL
FCINCREMENTALLAST
FCINCRVERIFY
FCWAIT
Persistent and change
recording available via
Incremental relationships.
Also, see note (1)
Do not perform full volume
background FlashCopy
FCNOCOPY
also used: FCNC
Change copy mode (no copy to
full background copy)
FCNOCOPYTOCOPY
see note (1)
Sequence number
not supported
Options for DFSMSdss to force selection of FlashCopy
FlashCopy as preferred copy
method for DFSMSdss
FASTREPLICATION
Note: With z/OS V1R6 or later, and APARs OA11002, OA12707, OA12748, and OA14105